- 13 Jul, 2023 10 commits
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Ricardo Neri authored
should_we_balance() traverses the group_balance_mask (AND'ed with lb_env:: cpus) starting from lower numbered CPUs looking for the first idle CPU. In hybrid x86 systems, the siblings of SMT cores get CPU numbers, before non-SMT cores: [0, 1] [2, 3] [4, 5] 6 7 8 9 b i b i b i b i i i In the figure above, CPUs in brackets are siblings of an SMT core. The rest are non-SMT cores. 'b' indicates a busy CPU, 'i' indicates an idle CPU. We should let a CPU on a fully idle core get the first chance to idle load balance as it has more CPU capacity than a CPU on an idle SMT CPU with busy sibling. So for the figure above, if we are running should_we_balance() to CPU 1, we should return false to let CPU 7 on idle core to have a chance first to idle load balance. A partially busy (i.e., of type group_has_spare) local group with SMT cores will often have only one SMT sibling busy. If the destination CPU is a non-SMT core, partially busy, lower-numbered, SMT cores should not be considered when finding the first idle CPU. However, in should_we_balance(), when we encounter idle SMT first in partially busy core, we prematurely break the search for the first idle CPU. Higher-numbered, non-SMT cores is not given the chance to have idle balance done on their behalf. Those CPUs will only be considered for idle balancing by chance via CPU_NEWLY_IDLE. Instead, consider the idle state of the whole SMT core. Signed-off-by:Ricardo Neri <ricardo.neri-calderon@linux.intel.com> Co-developed-by:
Tim Chen <tim.c.chen@linux.intel.com> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/807bdd05331378ea3bf5956bda87ded1036ba769.1688770494.git.tim.c.chen@linux.intel.com
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Tim C Chen authored
In the current prefer sibling load balancing code, there is an implicit assumption that the busiest sched group and local sched group are equivalent, hence the tasks to be moved is simply the difference in number of tasks between the two groups (i.e. imbalance) divided by two. However, we may have different number of cores between the cluster groups, say when we take CPU offline or we have hybrid groups. In that case, we should balance between the two groups such that #tasks/#cores ratio is the same between the same between both groups. Hence the imbalance computed will need to reflect this. Adjust the sibling imbalance computation to take into account of the above considerations. Signed-off-by:
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Tim C Chen authored
When balancing sibling domains that have different number of cores, tasks in respective sibling domain should be proportional to the number of cores in each domain. In preparation of implementing such a policy, record the number of cores in a scheduling group. Signed-off-by:
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Tim C Chen authored
On hybrid CPUs with scheduling cluster enabled, we will need to consider balancing between SMT CPU cluster, and Atom core cluster. Below shows such a hybrid x86 CPU with 4 big cores and 8 atom cores. Each scheduling cluster span a L2 cache. --L2-- --L2-- --L2-- --L2-- ----L2---- -----L2------ [0, 1] [2, 3] [4, 5] [5, 6] [7 8 9 10] [11 12 13 14] Big Big Big Big Atom Atom core core core core Module Module If the busiest group is a big core with both SMT CPUs busy, we should active load balance if destination group has idle CPU cores. Such condition is considered by asym_active_balance() in load balancing but not considered when looking for busiest group and computing load imbalance. Add this consideration in find_busiest_group() and calculate_imbalance(). In addition, update the logic determining the busier group when one group is SMT and the other group is non SMT but both groups are partially busy with idle CPU. The busier group should be the group with idle cores rather than the group with one busy SMT CPU. We do not want to make the SMT group the busiest one to pull the only task off SMT CPU and causing the whole core to go empty. Otherwise suppose in the search for the busiest group, we first encounter an SMT group with 1 task and set it as the busiest. The destination group is an atom cluster with 1 task and we next encounter an atom cluster group with 3 tasks, we will not pick this atom cluster over the SMT group, even though we should. As a result, we do not load balance the busier Atom cluster (with 3 tasks) towards the local atom cluster (with 1 task). And it doesn't make sense to pick the 1 task SMT group as the busier group as we also should not pull task off the SMT towards the 1 task atom cluster and make the SMT core completely empty. Signed-off-by: -
Miaohe Lin authored
The static key psi_cgroups_enabled is only used inside file psi.c. Make it static. Signed-off-by:
Miaohe Lin <linmiaohe@huawei.com> Signed-off-by:
Suren Baghdasaryan <surenb@google.com> Link: https://lore.kernel.org/r/20230525103428.49712-1-linmiaohe@huawei.com
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Cruz Zhao authored
As core scheduling introduced, a new state of idle is defined as force idle, running idle task but nr_running greater than zero. If a cpu is in force idle state, idle_cpu() will return zero. This result makes sense in some scenarios, e.g., load balance, showacpu when dumping, and judge the RCU boost kthread is starving. But this will cause error in other scenarios, e.g., tick_irq_exit(): When force idle, rq->curr == rq->idle but rq->nr_running > 0, results that idle_cpu() returns 0. In function tick_irq_exit(), if idle_cpu() is 0, tick_nohz_irq_exit() will not be called, and ts->idle_active will not become 1, which became 0 in tick_nohz_irq_enter(). ts->idle_sleeptime won't update in function update_ts_time_stats(), if ts->idle_active is 0, which should be 1. And this bug will result that ts->idle_sleeptime is less than the actual value, and finally will result that the idle time in /proc/stat is less than the actual value. To solve this problem, we introduce sched_core_idle_cpu(), which returns 1 when force idle. We audit all users of idle_cpu(), and change idle_cpu() into sched_core_idle_cpu() in function tick_irq_exit(). v2-->v3: Only replace idle_cpu() with sched_core_idle_cpu() in function tick_irq_exit(). And modify the corresponding commit log. Signed-off-by:
Cruz Zhao <CruzZhao@linux.alibaba.com> Signed-off-by:
Frederic Weisbecker <frederic@kernel.org> Reviewed-by:
Joel Fernandes <joel@joelfernandes.org> Link: https://lore.kernel.org/r/1688011324-42406-1-git-send-email-CruzZhao@linux.alibaba.com
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Josh Don authored
We currently export the total throttled time for cgroups that are given a bandwidth limit. This patch extends this accounting to also account the total time that each children cgroup has been throttled. This is useful to understand the degree to which children have been affected by the throttling control. Children which are not runnable during the entire throttled period, for example, will not show any self-throttling time during this period. Expose this in a new interface, 'cpu.stat.local', which is similar to how non-hierarchical events are accounted in 'memory.events.local'. Signed-off-by:
Josh Don <joshdon@google.com> Signed-off-by:
Tejun Heo <tj@kernel.org> Link: https://lore.kernel.org/r/20230620183247.737942-2-joshdon@google.com
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Josh Don authored
It is easy for a cfs_rq to become throttled even when it has no enqueued entities (for example, if we have just put_prev()'d the last runnable task of the cfs_rq, and the cfs_rq is out of quota). Avoid accounting this time towards total throttle time, since it otherwise falsely inflates the stats. Note that the dequeue path is special, since we normally disallow migrations when a task is in a throttled hierarchy (see throttled_lb_pair()). Signed-off-by:
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Wander Lairson Costa authored
In put_task_struct(), a spin_lock is indirectly acquired under the kernel stock. When running the kernel in real-time (RT) configuration, the operation is dispatched to a preemptible context call to ensure guaranteed preemption. However, if PROVE_RAW_LOCK_NESTING is enabled and __put_task_struct() is called while holding a raw_spinlock, lockdep incorrectly reports an "Invalid lock context" in the stock kernel. This false splat occurs because lockdep is unaware of the different route taken under RT. To address this issue, override the inner wait type to prevent the false lockdep splat. Suggested-by:
Oleg Nesterov <oleg@redhat.com> Suggested-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Suggested-by:
Wander Lairson Costa <wander@redhat.com> Signed-off-by:
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Wander Lairson Costa authored
Under PREEMPT_RT, __put_task_struct() indirectly acquires sleeping locks. Therefore, it can't be called from an non-preemptible context. One practical example is splat inside inactive_task_timer(), which is called in a interrupt context: CPU: 1 PID: 2848 Comm: life Kdump: loaded Tainted: G W --------- Hardware name: HP ProLiant DL388p Gen8, BIOS P70 07/15/2012 Call Trace: dump_stack_lvl+0x57/0x7d mark_lock_irq.cold+0x33/0xba mark_lock+0x1e7/0x400 mark_usage+0x11d/0x140 __lock_acquire+0x30d/0x930 lock_acquire.part.0+0x9c/0x210 rt_spin_lock+0x27/0xe0 refill_obj_stock+0x3d/0x3a0 kmem_cache_free+0x357/0x560 inactive_task_timer+0x1ad/0x340 __run_hrtimer+0x8a/0x1a0 __hrtimer_run_queues+0x91/0x130 hrtimer_interrupt+0x10f/0x220 __sysvec_apic_timer_interrupt+0x7b/0xd0 sysvec_apic_timer_interrupt+0x4f/0xd0 asm_sysvec_apic_timer_interrupt+0x12/0x20 RIP: 0033:0x7fff196bf6f5 Instead of calling __put_task_struct() directly, we defer it using call_rcu(). A more natural approach would use a workqueue, but since in PREEMPT_RT, we can't allocate dynamic memory from atomic context, the code would become more complex because we would need to put the work_struct instance in the task_struct and initialize it when we allocate a new task_struct. The issue is reproducible with stress-ng: while true; do stress-ng --sched deadline --sched-period 1000000000 \ --sched-runtime 800000000 --sched-deadline \ 1000000000 --mmapfork 23 -t 20 done Reported-by:Hu Chunyu <chuhu@redhat.com> Suggested-by:
Valentin Schneider <vschneid@redhat.com> Suggested-by:
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- 09 Jul, 2023 10 commits
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Linus Torvalds authored
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Linus Torvalds authored
We just sorted the entries and fields last release, so just out of a perverse sense of curiosity, I decided to see if we can keep things ordered for even just one release. The answer is "No. No we cannot". I suggest that all kernel developers will need weekly training sessions, involving a lot of Big Bird and Sesame Street. And at the yearly maintainer summit, we will all sing the alphabet song together. I doubt I will keep doing this. At some point "perverse sense of curiosity" turns into just a cold dark place filled with sadness and despair. Repeats: 80e62bc8 ("MAINTAINERS: re-sort all entries and fields") Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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git://git.infradead.org/users/hch/dma-mappingLinus Torvalds authored
Pull dma-mapping fixes from Christoph Hellwig: - swiotlb area sizing fixes (Petr Tesarik) * tag 'dma-mapping-6.5-2023-07-09' of git://git.infradead.org/users/hch/dma-mapping: swiotlb: reduce the number of areas to match actual memory pool size swiotlb: always set the number of areas before allocating the pool
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull irq update from Borislav Petkov: - Optimize IRQ domain's name assignment * tag 'irq_urgent_for_v6.5_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: irqdomain: Use return value of strreplace()
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 fpu fix from Borislav Petkov: - Do FPU AP initialization on Xen PV too which got missed by the recent boot reordering work * tag 'x86_urgent_for_v6.5_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/xen: Fix secondary processors' FPU initialization
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 fix from Thomas Gleixner: "A single fix for the mechanism to park CPUs with an INIT IPI. On shutdown or kexec, the kernel tries to park the non-boot CPUs with an INIT IPI. But the same code path is also used by the crash utility. If the CPU which panics is not the boot CPU then it sends an INIT IPI to the boot CPU which resets the machine. Prevent this by validating that the CPU which runs the stop mechanism is the boot CPU. If not, leave the other CPUs in HLT" * tag 'x86-core-2023-07-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/smp: Don't send INIT to boot CPU
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git://git.kernel.org/pub/scm/linux/kernel/git/mips/linuxLinus Torvalds authored
Pull MIPS fixes from Thomas Bogendoerfer: - fixes for KVM - fix for loongson build and cpu probing - DT fixes * tag 'mips_6.5_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: MIPS: kvm: Fix build error with KVM_MIPS_DEBUG_COP0_COUNTERS enabled MIPS: dts: add missing space before { MIPS: Loongson: Fix build error when make modules_install MIPS: KVM: Fix NULL pointer dereference MIPS: Loongson: Fix cpu_probe_loongson() again
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git://git.kernel.org/pub/scm/fs/xfs/xfs-linuxLinus Torvalds authored
Pull xfs fix from Darrick Wong: "Nothing exciting here, just getting rid of a gcc warning that I got tired of seeing when I turn on gcov" * tag 'xfs-6.5-merge-6' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: xfs: fix uninit warning in xfs_growfs_data
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git://git.samba.org/sfrench/cifs-2.6Linus Torvalds authored
Pull more smb client updates from Steve French: - fix potential use after free in unmount - minor cleanup - add worker to cleanup stale directory leases * tag '6.5-rc-smb3-client-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6: cifs: Add a laundromat thread for cached directories smb: client: remove redundant pointer 'server' cifs: fix session state transition to avoid use-after-free issue
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https://github.com/jonmason/ntbLinus Torvalds authored
Pull NTB updates from Jon Mason: "Fixes for pci_clean_master, error handling in driver inits, and various other issues/bugs" * tag 'ntb-6.5' of https://github.com/jonmason/ntb: ntb: hw: amd: Fix debugfs_create_dir error checking ntb.rst: Fix copy and paste error ntb_netdev: Fix module_init problem ntb: intel: Remove redundant pci_clear_master ntb: epf: Remove redundant pci_clear_master ntb_hw_amd: Remove redundant pci_clear_master ntb: idt: drop redundant pci_enable_pcie_error_reporting() MAINTAINERS: git://github -> https://github.com for jonmason NTB: EPF: fix possible memory leak in pci_vntb_probe() NTB: ntb_tool: Add check for devm_kcalloc NTB: ntb_transport: fix possible memory leak while device_register() fails ntb: intel: Fix error handling in intel_ntb_pci_driver_init() NTB: amd: Fix error handling in amd_ntb_pci_driver_init() ntb: idt: Fix error handling in idt_pci_driver_init()
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- 08 Jul, 2023 20 commits
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Hugh Dickins authored
Lockdep is certainly right to complain about (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_write+0x2d/0x3f but task is already holding lock: (&mapping->i_mmap_rwsem){+.+.}-{3:3}, at: mmap_region+0x4dc/0x6db Invert those to the usual ordering. Fixes: 33313a74 ("mm: lock newly mapped VMA which can be modified after it becomes visible") Cc: stable@vger.kernel.org Signed-off-by:Hugh Dickins <hughd@google.com> Tested-by:
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Linus Torvalds authored
Merge tag 'mm-hotfixes-stable-2023-07-08-10-43' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull hotfixes from Andrew Morton: "16 hotfixes. Six are cc:stable and the remainder address post-6.4 issues" The merge undoes the disabling of the CONFIG_PER_VMA_LOCK feature, since it was all hopefully fixed in mainline. * tag 'mm-hotfixes-stable-2023-07-08-10-43' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: lib: dhry: fix sleeping allocations inside non-preemptable section kasan, slub: fix HW_TAGS zeroing with slub_debug kasan: fix type cast in memory_is_poisoned_n mailmap: add entries for Heiko Stuebner mailmap: update manpage link bootmem: remove the vmemmap pages from kmemleak in free_bootmem_page MAINTAINERS: add linux-next info mailmap: add Markus Schneider-Pargmann writeback: account the number of pages written back mm: call arch_swap_restore() from do_swap_page() squashfs: fix cache race with migration mm/hugetlb.c: fix a bug within a BUG(): inconsistent pte comparison docs: update ocfs2-devel mailing list address MAINTAINERS: update ocfs2-devel mailing list address mm: disable CONFIG_PER_VMA_LOCK until its fixed fork: lock VMAs of the parent process when forking
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Suren Baghdasaryan authored
When forking a child process, the parent write-protects anonymous pages and COW-shares them with the child being forked using copy_present_pte(). We must not take any concurrent page faults on the source vma's as they are being processed, as we expect both the vma and the pte's behind it to be stable. For example, the anon_vma_fork() expects the parents vma->anon_vma to not change during the vma copy. A concurrent page fault on a page newly marked read-only by the page copy might trigger wp_page_copy() and a anon_vma_prepare(vma) on the source vma, defeating the anon_vma_clone() that wasn't done because the parent vma originally didn't have an anon_vma, but we now might end up copying a pte entry for a page that has one. Before the per-vma lock based changes, the mmap_lock guaranteed exclusion with concurrent page faults. But now we need to do a vma_start_write() to make sure no concurrent faults happen on this vma while it is being processed. This fix can potentially regress some fork-heavy workloads. Kernel build time did not show noticeable regression on a 56-core machine while a stress test mapping 10000 VMAs and forking 5000 times in a tight loop shows ~5% regression. If such fork time regression is unacceptable, disabling CONFIG_PER_VMA_LOCK should restore its performance. Further optimizations are possible if this regression proves to be problematic. Suggested-by:
David Hildenbrand <david@redhat.com> Reported-by:
Jiri Slaby <jirislaby@kernel.org> Closes: https://lore.kernel.org/all/dbdef34c-3a07-5951-e1ae-e9c6e3cdf51b@kernel.org/Reported-by:
Holger Hoffstätte <holger@applied-asynchrony.com> Closes: https://lore.kernel.org/all/b198d649-f4bf-b971-31d0-e8433ec2a34c@applied-asynchrony.com/Reported-by:
Jacob Young <jacobly.alt@gmail.com> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=217624 Fixes: 0bff0aae ("x86/mm: try VMA lock-based page fault handling first") Cc: stable@vger.kernel.org Signed-off-by:
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Suren Baghdasaryan authored
mmap_region adds a newly created VMA into VMA tree and might modify it afterwards before dropping the mmap_lock. This poses a problem for page faults handled under per-VMA locks because they don't take the mmap_lock and can stumble on this VMA while it's still being modified. Currently this does not pose a problem since post-addition modifications are done only for file-backed VMAs, which are not handled under per-VMA lock. However, once support for handling file-backed page faults with per-VMA locks is added, this will become a race. Fix this by write-locking the VMA before inserting it into the VMA tree. Other places where a new VMA is added into VMA tree do not modify it after the insertion, so do not need the same locking. Cc: stable@vger.kernel.org Signed-off-by:
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Suren Baghdasaryan authored
With recent changes necessitating mmap_lock to be held for write while expanding a stack, per-VMA locks should follow the same rules and be write-locked to prevent page faults into the VMA being expanded. Add the necessary locking. Cc: stable@vger.kernel.org Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds authored
Pull more SCSI updates from James Bottomley: "A few late arriving patches that missed the initial pull request. It's mostly bug fixes (the dt-bindings is a fix for the initial pull)" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: ufs: core: Remove unused function declaration scsi: target: docs: Remove tcm_mod_builder.py scsi: target: iblock: Quiet bool conversion warning with pr_preempt use scsi: dt-bindings: ufs: qcom: Fix ICE phandle scsi: core: Simplify scsi_cdl_check_cmd() scsi: isci: Fix comment typo scsi: smartpqi: Replace one-element arrays with flexible-array members scsi: target: tcmu: Replace strlcpy() with strscpy() scsi: ncr53c8xx: Replace strlcpy() with strscpy() scsi: lpfc: Fix lpfc_name struct packing
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git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linuxLinus Torvalds authored
Pull more i2c updates from Wolfram Sang: - xiic patch should have been in the original pull but slipped through - mpc patch fixes a build regression - nomadik cleanup * tag 'i2c-for-6.5-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: i2c: mpc: Drop unused variable i2c: nomadik: Remove a useless call in the remove function i2c: xiic: Don't try to handle more interrupt events after error
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git://git.kernel.org/pub/scm/linux/kernel/git/kees/linuxLinus Torvalds authored
Pull hardening fixes from Kees Cook: - Check for NULL bdev in LoadPin (Matthias Kaehlcke) - Revert unwanted KUnit FORTIFY build default - Fix 1-element array causing boot warnings with xhci-hub * tag 'hardening-v6.5-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: usb: ch9: Replace bmSublinkSpeedAttr 1-element array with flexible array Revert "fortify: Allow KUnit test to build without FORTIFY" dm: verity-loadpin: Add NULL pointer check for 'bdev' parameter
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Anup Sharma authored
The debugfs_create_dir function returns ERR_PTR in case of error, and the only correct way to check if an error occurred is 'IS_ERR' inline function. This patch will replace the null-comparison with IS_ERR. Signed-off-by:
Anup Sharma <anupnewsmail@gmail.com> Suggested-by:
Ivan Orlov <ivan.orlov0322@gmail.com> Signed-off-by:
Jon Mason <jdmason@kudzu.us>
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Linus Torvalds authored
Merge tag 'perf-tools-for-v6.5-2-2023-07-06' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next Pull more perf tools updates from Namhyung Kim: "These are remaining changes and fixes for this cycle. Build: - Allow generating vmlinux.h from BTF using `make GEN_VMLINUX_H=1` and skip if the vmlinux has no BTF. - Replace deprecated clang -target xxx option by --target=xxx. perf record: - Print event attributes with well known type and config symbols in the debug output like below: # perf record -e cycles,cpu-clock -C0 -vv true <SNIP> ------------------------------------------------------------ perf_event_attr: type 0 (PERF_TYPE_HARDWARE) size 136 config 0 (PERF_COUNT_HW_CPU_CYCLES) { sample_period, sample_freq } 4000 sample_type IP|TID|TIME|CPU|PERIOD|IDENTIFIER read_format ID disabled 1 inherit 1 freq 1 sample_id_all 1 exclude_guest 1 ------------------------------------------------------------ sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 5 ------------------------------------------------------------ perf_event_attr: type 1 (PERF_TYPE_SOFTWARE) size 136 config 0 (PERF_COUNT_SW_CPU_CLOCK) { sample_period, sample_freq } 4000 sample_type IP|TID|TIME|CPU|PERIOD|IDENTIFIER read_format ID disabled 1 inherit 1 freq 1 sample_id_all 1 exclude_guest 1 - Update AMD IBS event error message since it now support per-process profiling but no priviledge filters. $ sudo perf record -e ibs_op//k -C 0 Error: AMD IBS doesn't support privilege filtering. Try again without the privilege modifiers (like 'k') at the end. perf lock contention: - Support CSV style output using -x option $ sudo perf lock con -ab -x, sleep 1 # output: contended, total wait, max wait, avg wait, type, caller 19, 194232, 21415, 10222, spinlock, process_one_work+0x1f0 15, 162748, 23843, 10849, rwsem:R, do_user_addr_fault+0x40e 4, 86740, 23415, 21685, rwlock:R, ep_poll_callback+0x2d 1, 84281, 84281, 84281, mutex, iwl_mvm_async_handlers_wk+0x135 8, 67608, 27404, 8451, spinlock, __queue_work+0x174 3, 58616, 31125, 19538, rwsem:W, do_mprotect_pkey+0xff 3, 52953, 21172, 17651, rwlock:W, do_epoll_wait+0x248 2, 30324, 19704, 15162, rwsem:R, do_madvise+0x3ad 1, 24619, 24619, 24619, spinlock, rcu_core+0xd4 - Add --output option to save the data to a file not to be interfered by other debug messages. Test: - Fix event parsing test on ARM where there's no raw PMU nor supports PERF_PMU_CAP_EXTENDED_HW_TYPE. - Update the lock contention test case for CSV output. - Fix a segfault in the daemon command test. Vendor events (JSON): - Add has_event() to check if the given event is available on system at runtime. On Intel machines, some transaction events may not be present when TSC extensions are disabled. - Update Intel event metrics. Misc: - Sort symbols by name using an external array of pointers instead of a rbtree node in the symbol. This will save 16-bytes or 24-bytes per symbol whether the sorting is actually requested or not. - Fix unwinding DWARF callstacks using libdw when --symfs option is used" * tag 'perf-tools-for-v6.5-2-2023-07-06' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next: (38 commits) perf test: Fix event parsing test when PERF_PMU_CAP_EXTENDED_HW_TYPE isn't supported. perf test: Fix event parsing test on Arm perf evsel amd: Fix IBS error message perf: unwind: Fix symfs with libdw perf symbol: Fix uninitialized return value in symbols__find_by_name() perf test: Test perf lock contention CSV output perf lock contention: Add --output option perf lock contention: Add -x option for CSV style output perf lock: Remove stale comments perf vendor events intel: Update tigerlake to 1.13 perf vendor events intel: Update skylakex to 1.31 perf vendor events intel: Update skylake to 57 perf vendor events intel: Update sapphirerapids to 1.14 perf vendor events intel: Update icelakex to 1.21 perf vendor events intel: Update icelake to 1.19 perf vendor events intel: Update cascadelakex to 1.19 perf vendor events intel: Update meteorlake to 1.03 perf vendor events intel: Add rocketlake events/metrics perf vendor metrics intel: Make transaction metrics conditional perf jevents: Support for has_event function ...
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https://github.com/norov/linuxLinus Torvalds authored
Pull bitmap updates from Yury Norov: "Fixes for different bitmap pieces: - lib/test_bitmap: increment failure counter properly The tests that don't use expect_eq() macro to determine that a test is failured must increment failed_tests explicitly. - lib/bitmap: drop optimization of bitmap_{from,to}_arr64 bitmap_{from,to}_arr64() optimization is overly optimistic on 32-bit LE architectures when it's wired to bitmap_copy_clear_tail(). - nodemask: Drop duplicate check in for_each_node_mask() As the return value type of first_node() became unsigned, the node >= 0 became unnecessary. - cpumask: fix function description kernel-doc notation - MAINTAINERS: Add bits.h and bitfield.h to the BITMAP API record Add linux/bits.h and linux/bitfield.h for visibility" * tag 'bitmap-6.5-rc1' of https://github.com/norov/linux: MAINTAINERS: Add bitfield.h to the BITMAP API record MAINTAINERS: Add bits.h to the BITMAP API record cpumask: fix function description kernel-doc notation nodemask: Drop duplicate check in for_each_node_mask() lib/bitmap: drop optimization of bitmap_{from,to}_arr64 lib/test_bitmap: increment failure counter properly -
Geert Uytterhoeven authored
The Smatch static checker reports the following warnings: lib/dhry_run.c:38 dhry_benchmark() warn: sleeping in atomic context lib/dhry_run.c:43 dhry_benchmark() warn: sleeping in atomic context Indeed, dhry() does sleeping allocations inside the non-preemptable section delimited by get_cpu()/put_cpu(). Fix this by using atomic allocations instead. Add error handling, as atomic these allocations may fail. Link: https://lkml.kernel.org/r/bac6d517818a7cd8efe217c1ad649fffab9cc371.1688568764.git.geert+renesas@glider.be Fixes: 13684e96 ("lib: dhry: fix unstable smp_processor_id(_) usage") Reported-by:Dan Carpenter <dan.carpenter@linaro.org> Closes: https://lore.kernel.org/r/0469eb3a-02eb-4b41-b189-de20b931fa56@moroto.mountainSigned-off-by:
Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org>
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Andrey Konovalov authored
Commit 946fa0db ("mm/slub: extend redzone check to extra allocated kmalloc space than requested") added precise kmalloc redzone poisoning to the slub_debug functionality. However, this commit didn't account for HW_TAGS KASAN fully initializing the object via its built-in memory initialization feature. Even though HW_TAGS KASAN memory initialization contains special memory initialization handling for when slub_debug is enabled, it does not account for in-object slub_debug redzones. As a result, HW_TAGS KASAN can overwrite these redzones and cause false-positive slub_debug reports. To fix the issue, avoid HW_TAGS KASAN memory initialization when slub_debug is enabled altogether. Implement this by moving the __slub_debug_enabled check to slab_post_alloc_hook. Common slab code seems like a more appropriate place for a slub_debug check anyway. Link: https://lkml.kernel.org/r/678ac92ab790dba9198f9ca14f405651b97c8502.1688561016.git.andreyknvl@google.com Fixes: 946fa0db ("mm/slub: extend redzone check to extra allocated kmalloc space than requested") Signed-off-by:
Andrey Konovalov <andreyknvl@google.com> Reported-by:
Will Deacon <will@kernel.org> Acked-by:
Marco Elver <elver@google.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christoph Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Feng Tang <feng.tang@intel.com> Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: kasan-dev@googlegroups.com Cc: Pekka Enberg <penberg@kernel.org> Cc: Peter Collingbourne <pcc@google.com> Cc: Roman Gushchin <roman.gushchin@linux.dev> Cc: Vincenzo Frascino <vincenzo.frascino@arm.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: <stable@vger.kernel.org> Signed-off-by:
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Andrey Konovalov authored
Commit bb6e04a1 ("kasan: use internal prototypes matching gcc-13 builtins") introduced a bug into the memory_is_poisoned_n implementation: it effectively removed the cast to a signed integer type after applying KASAN_GRANULE_MASK. As a result, KASAN started failing to properly check memset, memcpy, and other similar functions. Fix the bug by adding the cast back (through an additional signed integer variable to make the code more readable). Link: https://lkml.kernel.org/r/8c9e0251c2b8b81016255709d4ec42942dcaf018.1688431866.git.andreyknvl@google.com Fixes: bb6e04a1 ("kasan: use internal prototypes matching gcc-13 builtins") Signed-off-by:
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Heiko Stuebner authored
I am going to lose my vrull.eu address at the end of july, and while adding it to mailmap I also realised that there are more old addresses from me dangling, so update .mailmap for all of them. Link: https://lkml.kernel.org/r/20230704163919.1136784-3-heiko@sntech.deSigned-off-by:
Heiko Stuebner <heiko@sntech.de> Signed-off-by:
Heiko Stuebner <heiko.stuebner@vrull.eu> Signed-off-by:
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Heiko Stuebner authored
Patch series "Update .mailmap for my work address and fix manpage". While updating mailmap for the going-away address, I also found that on current systems the manpage linked from the header comment changed. And in fact it looks like the git mailmap feature got its own manpage. This patch (of 2): On recent systems the git-shortlog manpage only tells people to See gitmailmap(5) So instead of sending people on a scavenger hunt, put that info into the header directly. Though keep the old reference around for older systems. Link: https://lkml.kernel.org/r/20230704163919.1136784-1-heiko@sntech.de Link: https://lkml.kernel.org/r/20230704163919.1136784-2-heiko@sntech.deSigned-off-by: -
Liu Shixin authored
commit dd0ff4d1 ("bootmem: remove the vmemmap pages from kmemleak in put_page_bootmem") fix an overlaps existing problem of kmemleak. But the problem still existed when HAVE_BOOTMEM_INFO_NODE is disabled, because in this case, free_bootmem_page() will call free_reserved_page() directly. Fix the problem by adding kmemleak_free_part() in free_bootmem_page() when HAVE_BOOTMEM_INFO_NODE is disabled. Link: https://lkml.kernel.org/r/20230704101942.2819426-1-liushixin2@huawei.com Fixes: f41f2ed4 ("mm: hugetlb: free the vmemmap pages associated with each HugeTLB page") Signed-off-by:
Liu Shixin <liushixin2@huawei.com> Acked-by:
Muchun Song <songmuchun@bytedance.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: <stable@vger.kernel.org> Signed-off-by:
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Randy Dunlap authored
Add linux-next info to MAINTAINERS for ease of finding this data. Link: https://lkml.kernel.org/r/20230704054410.12527-1-rdunlap@infradead.orgSigned-off-by:
Randy Dunlap <rdunlap@infradead.org> Acked-by:
Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
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Markus Schneider-Pargmann authored
Add my old mail address and update my name. Link: https://lkml.kernel.org/r/20230628081341.3470229-1-msp@baylibre.comSigned-off-by:
Markus Schneider-Pargmann <msp@baylibre.com> Signed-off-by:
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Matthew Wilcox (Oracle) authored
nr_to_write is a count of pages, so we need to decrease it by the number of pages in the folio we just wrote, not by 1. Most callers specify either LONG_MAX or 1, so are unaffected, but writeback_sb_inodes() might end up writing 512x as many pages as it asked for. Dave added: : XFS is the only filesystem this would affect, right? AFAIA, nothing : else enables large folios and uses writeback through : write_cache_pages() at this point... : : In which case, I'd be surprised if much difference, if any, gets : noticed by anyone. Link: https://lkml.kernel.org/r/20230628185548.981888-1-willy@infradead.org Fixes: 793917d9 ("mm/readahead: Add large folio readahead") Signed-off-by:
Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by:
Christoph Hellwig <hch@lst.de> Cc: Jan Kara <jack@suse.cz> Cc: Dave Chinner <david@fromorbit.com> Signed-off-by:
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