- 05 Feb, 2006 30 commits
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Eric Dumazet authored
percpu_data blindly allocates bootmem memory to store NR_CPUS instances of cpudata, instead of allocating memory only for possible cpus. As a preparation for changing that, we need to convert various 0 -> NR_CPUS loops to use for_each_cpu(). (The above only applies to users of asm-generic/percpu.h. powerpc has gone it alone and is presently only allocating memory for present CPUs, so it's currently corrupting memory). Signed-off-by:
Eric Dumazet <dada1@cosmosbay.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: James Bottomley <James.Bottomley@steeleye.com> Acked-by:
Ingo Molnar <mingo@elte.hu> Cc: Jens Axboe <axboe@suse.de> Cc: Anton Blanchard <anton@samba.org> Acked-by:
William Irwin <wli@holomorphy.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Linus Torvalds authored
This reverts commit 10f4dc8b. Quoth Andi Kleen: "Kiran decided that it makes the problem worse than it was before. Fixing it fully requires more work which is too much for 2.6.16. So please revert that commit for now." Signed-off-by:
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Jon Mason authored
This patch contains a printk reorder to remove the current problem of displaying "PCI-DMA: Disabling IOMMU." and then "PCI-DMA: using GART IOMMU" 20 lines later in dmesg. It also constains a printk reorder in swiotlb to state swiotlb enablement prior to describing the location of the bounce buffers, and a printk reorder to state gart enablement prior to describing the aperature. Also constains a whitespace cleanup in arch/x86_64/kernel/setup.c Tested (along with patch 2/2) on dual opteron with gart enabled, iommu=soft, and iommu=off. Signed-off-by:
Jon Mason <jdmason@us.ibm.com> Signed-off-by:
Andi Kleen <ak@suse.de> Signed-off-by:
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Andi Kleen authored
Hack for 2.6.16. In 2.6.17 all code that uses NR_CPUs should be audited and changed to only touch possible CPUs. Don't mark the reference per cpu data init data (so it stays around after boot) and point all impossible CPUs to it. This way they reference some valid - although shared memory. Usually this is only initialization like INIT_LIST_HEADs and there won't be races because these CPUs never run. Still somewhat hackish. Signed-off-by:
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Andi Kleen authored
It's bad juju to touch the APIC when it hasn't been enabled. I also moved ack_bad_irq for x86-64 out of line following i386. Signed-off-by:
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Ashok Raj authored
Some broken BIOS's had processors disabled, but same apic id as a valid processor. This causes acpi_processor_start() to think this disabled cpu is ok, and croak. So we dont record bad apicid's anymore. http://bugzilla.kernel.org/show_bug.cgi?id=5930Signed-off-by:
Ashok Raj <ashok.raj@intel.com> Signed-off-by:
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Jan Beulich authored
Checking of the validity of pointers should be consistently done before dereferencing the pointer. Signed-Off-By:
Jan Beulich <jbeulich@novell.com> Signed-off-by:
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Jan Beulich authored
Conditionalize two unwind directives to match other similarly conditional code. Signed-Off-By:
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Andi Kleen authored
On some broken motherboards (at least one NForce3 based AMD64 laptop) the PIT timer runs at a incorrect frequency. This patch adds a new option "apicpmtimer" that allows to use the APIC timer and calibrate it using the PMTimer. It requires the earlier patch that allows to run the main timer from the APIC. Specifying apicpmtimer implies apicmaintimer. The option defaults to off for now. I tested it on a few systems and the resulting APIC timer frequencies were usually a bit off, but always <1%, which should be tolerable. TBD figure out heuristic to enable this automatically on the affected systems TBD perhaps do it on all NForce3s or using DMI? Signed-off-by:
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Andi Kleen authored
kprobes cannot deal with the funny calling conventions when it runs on a different stack when it returns. If someone wants to instrument context switch they can add a probe to schedule() instead. Cc: jkenisto@us.ibm.com, prasanna@in.ibm.com Signed-off-by:
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Zach Brown authored
Align the start of the per-cpu section to the configured number of bytes in a cache line. This stops a BUG_ON() from triggering in load_module() when DEFINE_PER_CPU() is used in a module and the section isn't cacheline-aligned. Rusty also found this and sent a patch in a while ago (http://lkml.org/lkml/2004/10/19/17), I don't know what came of that. Signed-off-by:
Zach Brown <zach.brown@oracle.com> Signed-off-by:
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Kevin VanMaren authored
[ AK: I redid Kevin's fix to be simpler, but the idea and original analysis of the problem is from Kevin] This avoid allocation failures on some SATA systems like Nvidia CK8 when the IOMMU gets fragmented. Modern SATA devices have quite large queues (128 entries) and the FS with ext2/3 is good enough now that it often passes whole 128 page sg lists down to the driver. These require 512K of continuous free space in the IOMMU aperture to map when merged. When the IOMMU is fragmented this could lead to spurious IO errors due to failing mappings. Short term fix is to just try to map the SG list again unmerged page by page - this way fragmentation doesn't matter anymore. The code for that was already there, but it just wasn't enabled for the merge case. According to Kevin at least the Nvidia device doesn't seem to benefit from merging much anyways, so the only slowdown is from trying to do an unnecessary merge attempt. Kevin plans to implement better fragmentation avoidance in the future, but that wouldn't be 2.6.16 material. TBD: should add some statistic counters to count how often that really happens. Signed-off-by:
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Andi Kleen authored
I broke this earlier when moving the patch from i386 to x86-64. Need to return the virtual address here, not the physical address. This fixes some boot time crashes on x86-64. Cc: gregkh@suse.de Signed-off-by:
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Andi Kleen authored
- Check if the processor/memory affinity entries are long enough according to the ACPI 3.0 spec. - Ignore memory affinity entries that define a zero length region. All based on BIOS issues found in the field @) Signed-off-by:
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Ashok Raj authored
attached patch is 2 more cases i found via running the reference_init.pl script. These were easy to spot just knowing the file names. There is one another about init/main.c that i cant exactly zero in. (partly because i dont know how to interpret the data thats spewed out of the tool). Signed-off-by:
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Shaohua Li authored
SIgned-off-by: Shaohua Li<shaohua.li@intel.com> Signed-off-by:
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Andi Kleen authored
Might fix boot failures on systems with empty PXMs in SRAT Signed-off-by:
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Chen, Kenneth W authored
> mm/mempolicy.c: In function `huge_zonelist': > mm/mempolicy.c:1045: error: `HPAGE_SHIFT' undeclared (first use in this function) > mm/mempolicy.c:1045: error: (Each undeclared identifier is reported only once > mm/mempolicy.c:1045: error: for each function it appears in.) > make[1]: *** [mm/mempolicy.o] Error 1 Need to wrap huge_zonelist function with CONFIG_HUGETLBFS. Signed-off-by:
Ken Chen <kenneth.w.chen@intel.com> Signed-off-by:
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Andi Kleen authored
Signed-off-by:
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Andi Kleen authored
It has been enabled by default for some time now and is cheap enough so it doesn't matter anyways. Signed-off-by:
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Ravikiran G Thirumalai authored
Currently, x86_64 and ia64 arches do not clear the corresponding bits in the node's cpumask when a cpu goes down or cpu bring up is cancelled. This is buggy since there are pieces of common code where the cpumask is checked in the cpu down code path to decide on things (like in the slab down path). PPC does the right thing, but x86_64 and ia64 don't (This was the reason Sonny hit upon a slab bug during cpu offline on ppc and could not reproduce on other arches). This patch fixes it for x86_64. I won't attempt ia64 as I cannot test it. Credit for spotting this should go to Alok. Signed-off-by:
Alok N Kataria <alokk@calsoftinc.com> Signed-off-by:
Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by:
Shai Fultheim <shai@scalex86.org> Signed-off-by:
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Andi Kleen authored
They cause quite bad performance regressions on Netburst This is temporary until we can get new optimized functions for these CPUs. This undoes changes that were done in 2.6.15 and in 2.6.16-rc1, essentially bringing the code back to 2.6.14 level. Only change is I renamed the X86_FEATURE_K8_C flag to X86_FEATURE_REP_GOOD and fixed the check for the flag and also fixed some comments. Signed-off-by:
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Andi Kleen authored
This avoids BUG_ONs in the low level allocator when an illegal GFP mask is added. Signed-off-by:
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Shaohua Li authored
At resume time, TSC's value or something similar might be changed a lot against suspend time. This could make system gets a very big lost ticks. See http://bugzilla.kernel.org/show_bug.cgi?id=5825 Signed-off-by: Shaohua Li<shaohua.li@intel.com> Signed-off-by:
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Andi Kleen authored
They all have problems with IRQ 0 routing, so just use the APIC on them. Can be overwritten with "noapicmaintimer" Signed-off-by:
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Andi Kleen authored
Another piece from the no-idle-tick patch. This can be enabled with the "apicmaintimer" option. This is mainly useful when the PIT/HPET interrupt is unreliable. Note there are some systems that are known to stop the APIC timer in C3. For those it will never work, but this case should be automatically detected. It also only works with PM timer right now. When HPET is used the way the main timer handler computes the delay doesn't work. It should be a bit more efficient because there is one less regular interrupt to process on the boot processor. Requires earlier bugfix from Venkatesh Signed-off-by:
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Venkatesh Pallipadi authored
Bug in apic timer removal on C3 patch. We should switch to IPI from APIC timer only when C3 state is valid. Signed-off-by:
Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by:
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Andi Kleen authored
Avoids some ifdef mess later. Signed-off-by:
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Andi Kleen authored
A kprobe executes IRET early and that could cause NMI recursion and stack corruption. Signed-off-by:
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Andi Kleen authored
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- 04 Feb, 2006 2 commits
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Stephen Smalley authored
Remove private inode tests from security_inode_alloc and security_inode_free, as we otherwise end up leaking inode security structures for private inodes. Signed-off-by:
Stephen Smalley <sds@tycho.nsa.gov> Acked-by:
James Morris <jmorris@namei.org> Signed-off-by:
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Linus Torvalds authored
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- 03 Feb, 2006 8 commits
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Linus Torvalds authored
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Linus Torvalds authored
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Linus Torvalds authored
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Russell King authored
ARCH_CAMELOT (excalibur) got removed; remove it from the AT91 defconfigs Signed-off-by:Russell King <rmk+kernel@arm.linux.org.uk>
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Russell King authored
Prevent SERIAL_8250_RUNTIME_UARTS being larger than SERIAL_8250_NR_UARTS. Signed-off-by: -
Mark Fasheh authored
The mount path had incorrectly asked the locking code to wait for recovery completion, which deadlocks things because recovery waits for mount to complete first. Signed-off-by:Mark Fasheh <mark.fasheh@oracle.com>
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Eric Sesterhenn / snakebyte authored
this changes if() BUG(); constructs to BUG_ON() which is cleaner, contains unlikely() and can better optimized away. Signed-off-by:
Eric Sesterhenn <snakebyte@gmx.de> Signed-off-by:
Joel Becker <joel.becker@oracle.com> Signed-off-by:
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