- 25 Jun, 2005 40 commits
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Paolo 'Blaisorblade' Giarrusso authored
Cope with a conditional i386 definition, which is wrong for UML. Before we just used that one, but it wasn't defined for CONFIG_SMP, so in that case we got link errors. Signed-off-by:
Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Jeff Dike authored
Clean up the hot-unplugging code. There is now an id procedure which is called to figure out what device we're talking to. The error messages from that are now done from mconsole_remove instead of the driver. remove is now called with the device number, after it has been checked, so doesn't need to do sanity checking on it. Signed-off-by:
Jeff Dike <jdike@addtoit.com> Cc: Paolo Giarrusso <blaisorblade@yahoo.it> Signed-off-by:
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Jeff Dike authored
user_time_init_skas and user_time_init_tt were essentially the same. So, this merges them, deleting the mode-specific functions and declarations. Signed-off-by:
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Jeff Dike authored
kmalloc wasn't being disabled during panic. This patch ensures that, no matter how UML is exiting, it is disabled. This matters because part of the cleanup is to remove the umid file, which involves readdir, which calls malloc. This must map to libc malloc, rather than kmalloc or vmalloc. Signed-off-by:
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Jeff Dike authored
In skas mode, the call to uml_idle_timer permanently shut off the virtual timer, resulting in no timer ticks to anything but the idle thread. This is likely the cause of the soft lockups that are seen sporadically in recent UMLs. Signed-off-by:
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Jeff Dike authored
Fix the do_fork calling convention: normal arch pass the regs and the new sp value to do_fork instead of NULL. Currently the arch-independent code ignores these values, while the UML code (actually it's copy_thread) gets the right values by itself. With this patch, things are fixed up. Signed-off-by:
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Jesper Juhl authored
Here's a small patch to remove a few unnessesary NULL pointer checks before kfree() in arch/um/drivers/daemon_user.c Signed-off-by:
Jesper Juhl <juhl-lkml@dif.dk> Signed-off-by:
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Andrew Morton authored
Size of pointer doesn't seem right, but maybe my solution isn't either (sig_size maybe?). Signed-off-by:
Domen Puncer <domen@coderock.org> Signed-off-by:
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Pavel Machek authored
Update video-after-suspend documentation; few more machines are added. Signed-off-by:
Pavel Machek <pavel@suse.cz> Signed-off-by:
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Pavel Machek authored
Show swsuspend only on .config where it can compile. I got this on PPC32 && SMP: kernel/power/smp.c:24: error: storage size of `ctxt' isn't known Also mark swsusp as no longer experimental. Signed-off-by:
Olaf Hering <olh@suse.de> Signed-off-by:
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pavel@ucw.cz authored
Added reference implementation of suspend and resume routines. From: Shaohua Li <shaohua.li@intel.com> build fix Signed-off-by:
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Shaohua Li authored
In the cpu hotplug case, per-cpu data possibly isn't initialized even the system state is 'running'. As the comments say in the original code, some console drivers assume per-cpu resources have been allocated. radeon fb is one such driver, which uses kmalloc. After a CPU is down, the per-cpu data of slab is freed, so the system crashed when printing some info. Signed-off-by:
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Pavel Machek authored
This patch fixes register saving so that each register is only saved once, and adds missing saving of %cr8 on x86-64. Some reordering so that save/restore is more logical/safer (segment registers should be restored after gdt). Signed-off-by:
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Pavel Machek authored
The following patch moves the recalculation of nr_copy_pages so that the right number is used in the calculation of the size of memory and swap needed. It prevents swsusp from attempting to suspend if there is not enough memory and/or swap (which is unlikely anyway). Signed-off-by:
Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by:
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Pavel Machek authored
The following patch cleans up whitespace in swsusp.c (a bit): - removes any trailing whitespace - adds spaces after if, for, for_each_pbe, for_each_zone etc., wherever necessary. Signed-off-by:
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Pavel Machek authored
The following patch removes the unnecessary function does_collide_order(). This function is no longer necessary, as currently there are only 0-order allocations in swsusp, and the use of it is confusing. Signed-off-by:
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Pavel Machek authored
Without this patch, Linux provokes emergency disk shutdowns and similar nastiness. It was in SuSE kernels for some time, IIRC. Signed-off-by:
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Pavel Machek authored
This fixes typos/formatting in video_extension.txt. Signed-off-by:
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Pavel Machek authored
Sleep code uses wrong version of lgdt, that does the wrong thing when gdt is beyond 16MB or so. Signed-off-by:
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Pavel Machek authored
CONFIG_PM_DISK is long gone, but it still managed to survived at few places. Signed-off-by:
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Pavel Machek authored
This updates documentation and fixes pointers in MAINTAINERS file. Signed-off-by:
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Li Shaohua authored
Using CPU hotplug to support suspend/resume SMP. Both S3 and S4 use disable/enable_nonboot_cpus API. The S4 part is based on Pavel's original S4 SMP patch. Signed-off-by: Li Shaohua<shaohua.li@intel.com> Signed-off-by:
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Nathan Lynch authored
We already do kobject_hotplug for cpu offline; this adds a kobject_hotplug call for the online case. This is being requested by developers of an application which wants to be notified about both kinds of events. Signed-off-by:
Nathan Lynch <ntl@pobox.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Greg KH <greg@kroah.com> Signed-off-by:
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Shaohua Li authored
Dead CPU notifies online CPU that it's dead using cpu_state variable. After switching to physical cpu hotplug, we forgot setting the variable. This patch fixes it. Currently only __cpu_die uses it. We changed other locations for consistency in case others use it. Signed-off-by:
Shaohua Li <shaohua.li@intel.com> Acked-by:
Ashok Raj <ashok.raj@intel.com> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by:
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Ashok Raj authored
This patch provides an option to switch broadcast or use mask version for sending IPI's. If CONFIG_HOTPLUG_CPU is defined, we choose not to use broadcast shortcuts by default, otherwise we choose broadcast mode as default. both cases, one can change this via startup cmd line option, to choose no-broadcast mode. no_ipi_broadcast=1 This is provided on request from Andi Kleen, since he doesnt agree with replacing IPI shortcuts as a solution for CPU hotplug. Without removing broadcast IPI's, it would mean lots of new code for __cpu_up() path, which would acheive the same results. Signed-off-by:
Andi Kleen <ak@muc.de> Acked-by:
Zwane Mwaikambo <zwane@arm.linux.org.uk> Signed-off-by:
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Ashok Raj authored
Broadcast IPI's provide un-expected behaviour for cpu hotplug. CPU's in offline state also end up receiving the IPI. Once the cpus become online they receive these stale IPI's which are bad and introduce unexpected behaviour. This is easily avoided by not sending a broadcast and addressing just the CPU's in online map. Doing prelim cycle counts it appears there is no big overhead and numbers seem around 0x3000-0x3900 on an average on x86 and x86_64 systems with CPUS running 3G, both for broadcast and mask version of the API's. The shortcuts are useful only for flat mode (where the perf shows no degradation), and in cluster mode, its unicast anyway. Its simpler to just not use broadcast anymore. Signed-off-by:
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Ashok Raj authored
This patch is a minor cleanup to the cpu sibling/core map. It is required that this setup happens on a per-cpu bringup time. Signed-off-by:
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Ashok Raj authored
Experimental CPU hotplug patch for x86_64 ----------------------------------------- This supports logical CPU online and offline. - Test with maxcpus=1, and then kick other cpu's off to test if init code is all cleaned up. CONFIG_SCHED_SMT works as well. - idle threads are forked on demand from keventd threads for clean startup TBD: 1. Not tested on a real NUMA machine (tested with numa=fake=2) 2. Handle ACPI pieces for physical hotplug support. Signed-off-by:
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Ashok Raj authored
This patch adds __cpuinit and __cpuinitdata sections that need to exist past boot to support cpu hotplug. Caveat: This is done *only* for EM64T CPU Hotplug support, on request from Andi Kleen. Much of the generic hotplug code in kernel, and none of the other archs that support CPU hotplug today, i386, ia64, ppc64, s390 and parisc dont mark sections with __cpuinit, but only mark them as __devinit, and __devinitdata. If someone is motivated to change generic code, we need to make sure all existing hotplug code does not break, on other arch's that dont use __cpuinit, and __cpudevinit. Signed-off-by:
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Ashok Raj authored
I really wish smp_prepare_cpu() would disappear eventually. In the interim this is ideally a weak function, so we dont end up changing several places to define this dummy in headers. Today since the dummy declaration is done only in drivers/base/cpu.c but the function is called in kernel/power/smp.c i get undefined reference in my cpu hotplug code for x86_64 under development. Signed-off-by:
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Li Shaohua authored
Clean CPU states in order to reuse smp boot code for CPU hotplug. Signed-off-by: Li Shaohua<shaohua.li@intel.com> Signed-off-by:
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Li Shaohua authored
Trival patch for CPU hotplug. In CPU identify part, only did cleaup for intel CPUs. Need do for other CPUs if they support S3 SMP. Signed-off-by: Li Shaohua<shaohua.li@intel.com> Signed-off-by:
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Li Shaohua authored
Make sibling map init per-cpu. Hotplug CPU may change the map at runtime. Signed-off-by: Li Shaohua<shaohua.li@intel.com> Signed-off-by:
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Li Shaohua authored
Make SEP init per-cpu, so it is hotplug safe. Signed-off-by: Li Shaohua<shaohua.li@intel.com> Signed-off-by:
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Ashok Raj authored
This patch introduces a startup parameter no_broadcast. When we enable CONFIG_HOTPLUG_CPU, we dont want to use broadcast shortcut as it has ill effects on a offline cpu. If we issue broadcast, the IPI is also delivered to offline cpus, or partially up cpu causing stale IPI's to be handled, which is a problem and can cause undesirable effects. Introduces a new startup cmdline option no_ipi_broadcast, that can be switched at cmdline if necessary. Signed-off-by:
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Zwane Mwaikambo authored
(The i386 CPU hotplug patch provides infrastructure for some work which Pavel is doing as well as for ACPI S3 (suspend-to-RAM) work which Li Shaohua <shaohua.li@intel.com> is doing) The following provides i386 architecture support for safely unregistering and registering processors during runtime, updated for the current -mm tree. In order to avoid dumping cpu hotplug code into kernel/irq/* i dropped the cpu_online check in do_IRQ() by modifying fixup_irqs(). The difference being that on cpu offline, fixup_irqs() is called before we clear the cpu from cpu_online_map and a long delay in order to ensure that we never have any queued external interrupts on the APICs. There are additional changes to s390 and ppc64 to account for this change. 1) Add CONFIG_HOTPLUG_CPU 2) disable local APIC timer on dead cpus. 3) Disable preempt around irq balancing to prevent CPUs going down. 4) Print irq stats for all possible cpus. 5) Debugging check for interrupts on offline cpus. 6) Hacky fixup_irqs() to redirect irqs when cpus go off/online. 7) play_dead() for offline cpus to spin inside. 8) Handle offline cpus set in flush_tlb_others(). 9) Grab lock earlier in smp_call_function() to prevent CPUs going down. 10) Implement __cpu_disable() and __cpu_die(). 11) Enable local interrupts in cpu_enable() after fixup_irqs() 12) Don't fiddle with NMI on dead cpu, but leave intact on other cpus. 13) Program IRQ affinity whilst cpu is still in cpu_online_map on offline. Signed-off-by:
Zwane Mwaikambo <zwane@linuxpower.ca> Signed-off-by:
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Shaohua Li authored
I'm doing the cpu hotplug stress test and found a variable ('ready') is overflow after several hundreds rounds of cpu hotplug. Here is a fix. Signed-off-by: Shaohua Li<shaohua.li@intel.com> Signed-off-by: -
Shaohua Li authored
With hpet enabled, cpu hotplug uses some routines marked with __init. Signed-off-by: Shaohua Li<shaohua.li@intel.com> Signed-off-by:
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Andrey Panin authored
Whitespace and CodingStyle cleanup. No functionality changes. Signed-off-by:
Andrey Panin <pazke@donpac.ru> Signed-off-by:
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Andrey Panin authored
Since last dmi quirk looks useless (it just prints 404 compliant url) we can finally remove central dmi blacklist. Signed-off-by:
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