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Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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Pull perf fixes from Ingo Molnar:
 "Misc fixes plus a small hw-enablement patch for Intel IB model 58
  uncore events"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel/lbr: Demand proper privileges for PERF_SAMPLE_BRANCH_KERNEL
  perf/x86/intel/lbr: Fix LBR filter
  perf/x86: Blacklist all MEM_*_RETIRED events for Ivy Bridge
  perf: Fix vmalloc ring buffer pages handling
  perf/x86/intel: Fix unintended variable name reuse
  perf/x86/intel: Add support for IvyBridge model 58 Uncore
  perf/x86/intel: Fix typo in perf_event_intel_uncore.c
  x86: Eliminate irq_mis_count counted in arch_irq_stat
This commit is contained in:
Linus Torvalds
2013-05-05 11:37:16 -07:00
parent f8ce1faf55 7cc23cd6c0
commit 64049d1973
5 changed files with 51 additions and 26 deletions
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kernel/events/ring_buffer.c
+10 -4
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@@ -326,11 +326,16 @@ void rb_free(struct ring_buffer *rb)
}
#else
static int data_page_nr(struct ring_buffer *rb)
{
return rb->nr_pages << page_order(rb);
}
struct page *
perf_mmap_to_page(struct ring_buffer *rb, unsigned long pgoff)
{
if (pgoff > (1UL << page_order(rb)))
/* The '>' counts in the user page. */
if (pgoff > data_page_nr(rb))
return NULL;
return vmalloc_to_page((void *)rb->user_page + pgoff * PAGE_SIZE);
@@ -350,10 +355,11 @@ static void rb_free_work(struct work_struct *work)
int i, nr;
rb = container_of(work, struct ring_buffer, work);
nr = 1 << page_order(rb);
nr = data_page_nr(rb);
base = rb->user_page;
for (i = 0; i < nr + 1; i++)
/* The '<=' counts in the user page. */
for (i = 0; i <= nr; i++)
perf_mmap_unmark_page(base + (i * PAGE_SIZE));
vfree(base);
@@ -387,7 +393,7 @@ struct ring_buffer *rb_alloc(int nr_pages, long watermark, int cpu, int flags)
rb->user_page = all_buf;
rb->data_pages[0] = all_buf + PAGE_SIZE;
rb->page_order = ilog2(nr_pages);
rb->nr_pages = 1;
rb->nr_pages = !!nr_pages;
ring_buffer_init(rb, watermark, flags);