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  1. 23 1月, 2010 1 次提交
  3. 11 12月, 2009 1 次提交
    • P
      x86, AMD: Fix stale cpuid4_info shared_map data in shared_cpu_map cpumasks · ebb682f5
      由 Prarit Bhargava 提交于 
      The per_cpu cpuid4_info shared_map can contain stale data when CPUs are added
and removed.

The stale data can lead to a NULL pointer derefernce panic on a remove of a
CPU that has had siblings previously removed.

This patch resolves the panic by verifying a cpu is actually online before
adding it to the shared_cpu_map, only examining cpus that are part of
the same lower level cache, and by updating other siblings lowest level cache
maps when a cpu is added.
Signed-off-by: NPrarit Bhargava <prarit@redhat.com>
LKML-Reference: <20091209183336.17855.98708.sendpatchset@prarit.bos.redhat.com>
Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
      ebb682f5
  5. 13 11月, 2009 1 次提交
    • D
      x86: Remove the CPU cache size printk's · 15cd8812
      由 Dave Jones 提交于 
      They aren't really useful, and they pollute the dmesg output a lot
(especially on machines with many cores).

Also the same information can be trivially found out from
userspace.
Reported-by: NMike Travis <travis@sgi.com>
Signed-off-by: NDave Jones <davej@redhat.com>
Acked-by: NH. Peter Anvin <hpa@zytor.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Roland Dreier <rdreier@cisco.com>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Cc: Tejun Heo <tj@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Cc: Jack Steiner <steiner@sgi.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20091112231542.GA7129@redhat.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      15cd8812
  7. 11 11月, 2009 2 次提交
  9. 29 10月, 2009 1 次提交
    • T
      percpu: make percpu symbols in x86 unique · 0fe1e009
      由 Tejun Heo 提交于 
      This patch updates percpu related symbols in x86 such that percpu
symbols are unique and don't clash with local symbols.  This serves
two purposes of decreasing the possibility of global percpu symbol
collision and allowing dropping per_cpu__ prefix from percpu symbols.

* arch/x86/kernel/cpu/common.c: rename local variable to avoid collision

* arch/x86/kvm/svm.c: s/svm_data/sd/ for local variables to avoid collision

* arch/x86/kernel/cpu/cpu_debug.c: s/cpu_arr/cpud_arr/
  				   s/priv_arr/cpud_priv_arr/
				   s/cpu_priv_count/cpud_priv_count/

* arch/x86/kernel/cpu/intel_cacheinfo.c: s/cpuid4_info/ici_cpuid4_info/
  					 s/cache_kobject/ici_cache_kobject/
					 s/index_kobject/ici_index_kobject/

* arch/x86/kernel/ds.c: s/cpu_context/cpu_ds_context/

Partly based on Rusty Russell's "alloc_percpu: rename percpu vars
which cause name clashes" patch.
Signed-off-by: NTejun Heo <tj@kernel.org>
Acked-by: N(kvm) Avi Kivity <avi@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: x86@kernel.org
      0fe1e009
  11. 04 9月, 2009 1 次提交
  13. 11 7月, 2009 1 次提交
  15. 10 4月, 2009 6 次提交
  17. 12 3月, 2009 1 次提交
  19. 27 2月, 2009 1 次提交
    • I
      fix warning in arch/x86/kernel/cpu/intel_cacheinfo.c · ba1d755a
      由 Ingo Molnar 提交于 
      fix this warning:

  arch/x86/kernel/cpu/intel_cacheinfo.c:139: warning: ‘k8_nb_id’ defined but not used
  arch/x86/kernel/cpu/intel_cacheinfo.c:527: warning: ‘free_cache_attributes’ defined but not used
  arch/x86/kernel/cpu/intel_cacheinfo.c:538: warning: ‘detect_cache_attributes’ defined but not used

Unused variables in the !CONFIG_SYSCTL case.
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      ba1d755a
  21. 01 2月, 2009 1 次提交
  23. 27 1月, 2009 1 次提交
  25. 12 1月, 2009 1 次提交
  27. 29 12月, 2008 1 次提交
  29. 17 12月, 2008 1 次提交
  31. 13 12月, 2008 1 次提交
    • R
      cpumask: change cpumask_scnprintf, cpumask_parse_user, cpulist_parse, and... · 29c0177e
      由 Rusty Russell 提交于 
      cpumask: change cpumask_scnprintf, cpumask_parse_user, cpulist_parse, and cpulist_scnprintf to take pointers.

Impact: change calling convention of existing cpumask APIs

Most cpumask functions started with cpus_: these have been replaced by
cpumask_ ones which take struct cpumask pointers as expected.

These four functions don't have good replacement names; fortunately
they're rarely used, so we just change them over.
Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
Signed-off-by: NMike Travis <travis@sgi.com>
Acked-by: NIngo Molnar <mingo@elte.hu>
Cc: paulus@samba.org
Cc: mingo@redhat.com
Cc: tony.luck@intel.com
Cc: ralf@linux-mips.org
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: cl@linux-foundation.org
Cc: srostedt@redhat.com
      29c0177e
  33. 30 11月, 2008 1 次提交
  35. 28 7月, 2008 5 次提交
  37. 26 7月, 2008 1 次提交
  39. 19 7月, 2008 1 次提交
    • M
      cpumask: Replace cpumask_of_cpu with cpumask_of_cpu_ptr · 65c01184
      由 Mike Travis 提交于 
        * This patch replaces the dangerous lvalue version of cpumask_of_cpu
    with new cpumask_of_cpu_ptr macros.  These are patterned after the
    node_to_cpumask_ptr macros.

    In general terms, if there is a cpumask_of_cpu_map[] then a pointer to
    the cpumask_of_cpu_map[cpu] entry is used.  The cpumask_of_cpu_map
    is provided when there is a large NR_CPUS count, reducing
    greatly the amount of code generated and stack space used for
    cpumask_of_cpu().  The pointer to the cpumask_t value is needed for
    calling set_cpus_allowed_ptr() to reduce the amount of stack space
    needed to pass the cpumask_t value.

    If there isn't a cpumask_of_cpu_map[], then a temporary variable is
    declared and filled in with value from cpumask_of_cpu(cpu) as well as
    a pointer variable pointing to this temporary variable.  Afterwards,
    the pointer is used to reference the cpumask value.  The compiler
    will optimize out the extra dereference through the pointer as well
    as the stack space used for the pointer, resulting in identical code.

    A good example of the orthogonal usages is in net/sunrpc/svc.c:

	case SVC_POOL_PERCPU:
	{
		unsigned int cpu = m->pool_to[pidx];
		cpumask_of_cpu_ptr(cpumask, cpu);

		*oldmask = current->cpus_allowed;
		set_cpus_allowed_ptr(current, cpumask);
		return 1;
	}
	case SVC_POOL_PERNODE:
	{
		unsigned int node = m->pool_to[pidx];
		node_to_cpumask_ptr(nodecpumask, node);

		*oldmask = current->cpus_allowed;
		set_cpus_allowed_ptr(current, nodecpumask);
		return 1;
	}
Signed-off-by: NMike Travis <travis@sgi.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      65c01184
  41. 18 7月, 2008 1 次提交
  43. 24 5月, 2008 1 次提交
  45. 13 5月, 2008 1 次提交
  47. 20 4月, 2008 3 次提交
    • M
      x86: modify show_shared_cpu_map in intel_cacheinfo · fb0f330e
      由 Mike Travis 提交于 
        * Removed kmalloc (or local array) in show_shared_cpu_map().

  * Added show_shared_cpu_list() function.
Signed-off-by: NMike Travis <travis@sgi.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      fb0f330e
    • M
      x86: use new set_cpus_allowed_ptr function · fc0e4748
      由 Mike Travis 提交于 
        * Use new set_cpus_allowed_ptr() function added by previous patch,
    which instead of passing the "newly allowed cpus" cpumask_t arg
    by value,  pass it by pointer:

    -int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask)
    +int set_cpus_allowed_ptr(struct task_struct *p, const cpumask_t *new_mask)

  * Cleanup uses of CPU_MASK_ALL.

  * Collapse other NR_CPUS changes to arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
    Use pointers to cpumask_t arguments whenever possible.

Depends on:
	[sched-devel]: sched: add new set_cpus_allowed_ptr function

Cc: Len Brown <len.brown@intel.com>
Cc: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: NMike Travis <travis@sgi.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      fc0e4748
    • M
      x86: reduce memory and stack usage in intel_cacheinfo · 6b6309b4
      由 Mike Travis 提交于 
      * Change the following static arrays sized by NR_CPUS to
  per_cpu data variables:

	_cpuid4_info *cpuid4_info[NR_CPUS];
	_index_kobject *index_kobject[NR_CPUS];
	kobject * cache_kobject[NR_CPUS];

* Remove the local NR_CPUS array with a kmalloc'd region in
  show_shared_cpu_map().

Also some minor complaints from checkpatch.pl fixed.

Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: NMike Travis <travis@sgi.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      6b6309b4
  49. 01 2月, 2008 1 次提交
    • H
      x86: fix sparse warnings in intel_cacheinfo.c · c1666e66
      由 Harvey Harrison 提交于 
      arch/x86/kernel/cpu/intel_cacheinfo.c:355:7: warning: symbol 'i' shadows an earlier one
arch/x86/kernel/cpu/intel_cacheinfo.c:296:39: originally declared here
arch/x86/kernel/cpu/intel_cacheinfo.c:367:18: warning: incorrect type in argument 2 (different signedness)
arch/x86/kernel/cpu/intel_cacheinfo.c:367:18:    expected unsigned int *eax
arch/x86/kernel/cpu/intel_cacheinfo.c:367:18:    got int *
arch/x86/kernel/cpu/intel_cacheinfo.c:367:28: warning: incorrect type in argument 3 (different signedness)
arch/x86/kernel/cpu/intel_cacheinfo.c:367:28:    expected unsigned int *ebx
arch/x86/kernel/cpu/intel_cacheinfo.c:367:28:    got int *
arch/x86/kernel/cpu/intel_cacheinfo.c:367:38: warning: incorrect type in argument 4 (different signedness)
arch/x86/kernel/cpu/intel_cacheinfo.c:367:38:    expected unsigned int *ecx
arch/x86/kernel/cpu/intel_cacheinfo.c:367:38:    got int *
arch/x86/kernel/cpu/intel_cacheinfo.c:367:48: warning: incorrect type in argument 5 (different signedness)
arch/x86/kernel/cpu/intel_cacheinfo.c:367:48:    expected unsigned int *edx
arch/x86/kernel/cpu/intel_cacheinfo.c:367:48:    got int *
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      c1666e66
  51. 25 1月, 2008 2 次提交
  53. 21 12月, 2007 1 次提交