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Merge branch 'akpm' (patches from Andrew)

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Merge misc fixes from Andrew Morton:
 "10 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  scripts/gdb: fix lx-lsmod refcnt
  omfs: fix potential integer overflow in allocator
  omfs: fix sign confusion for bitmap loop counter
  omfs: set error return when d_make_root() fails
  fs, omfs: add NULL terminator in the end up the token list
  MAINTAINERS: update CAPABILITIES pattern
  fs/binfmt_elf.c:load_elf_binary(): return -EINVAL on zero-length mappings
  tracing/mm: don't trace mm_page_pcpu_drain on offline cpus
  tracing/mm: don't trace mm_page_free on offline cpus
  tracing/mm: don't trace kmem_cache_free on offline cpus
This commit is contained in:
Linus Torvalds
2015-05-29 13:28:57 -07:00
parent 6e49ba1bb1 ca3f172c19
commit c2102f3d73
6 changed files with 60 additions and 18 deletions
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54
include/trace/events/kmem.h
View File

@@ -140,19 +140,42 @@ DEFINE_EVENT(kmem_free, kfree,
TP_ARGS(call_site, ptr)
);
DEFINE_EVENT(kmem_free, kmem_cache_free,
DEFINE_EVENT_CONDITION(kmem_free, kmem_cache_free,
TP_PROTO(unsigned long call_site, const void *ptr),
TP_ARGS(call_site, ptr)
TP_ARGS(call_site, ptr),
/*
* This trace can be potentially called from an offlined cpu.
* Since trace points use RCU and RCU should not be used from
* offline cpus, filter such calls out.
* While this trace can be called from a preemptable section,
* it has no impact on the condition since tasks can migrate
* only from online cpus to other online cpus. Thus its safe
* to use raw_smp_processor_id.
*/
TP_CONDITION(cpu_online(raw_smp_processor_id()))
);
TRACE_EVENT(mm_page_free,
TRACE_EVENT_CONDITION(mm_page_free,
TP_PROTO(struct page *page, unsigned int order),
TP_ARGS(page, order),
/*
* This trace can be potentially called from an offlined cpu.
* Since trace points use RCU and RCU should not be used from
* offline cpus, filter such calls out.
* While this trace can be called from a preemptable section,
* it has no impact on the condition since tasks can migrate
* only from online cpus to other online cpus. Thus its safe
* to use raw_smp_processor_id.
*/
TP_CONDITION(cpu_online(raw_smp_processor_id())),
TP_STRUCT__entry(
__field( unsigned long, pfn )
__field( unsigned int, order )
@@ -253,12 +276,35 @@ DEFINE_EVENT(mm_page, mm_page_alloc_zone_locked,
TP_ARGS(page, order, migratetype)
);
DEFINE_EVENT_PRINT(mm_page, mm_page_pcpu_drain,
TRACE_EVENT_CONDITION(mm_page_pcpu_drain,
TP_PROTO(struct page *page, unsigned int order, int migratetype),
TP_ARGS(page, order, migratetype),
/*
* This trace can be potentially called from an offlined cpu.
* Since trace points use RCU and RCU should not be used from
* offline cpus, filter such calls out.
* While this trace can be called from a preemptable section,
* it has no impact on the condition since tasks can migrate
* only from online cpus to other online cpus. Thus its safe
* to use raw_smp_processor_id.
*/
TP_CONDITION(cpu_online(raw_smp_processor_id())),
TP_STRUCT__entry(
__field( unsigned long, pfn )
__field( unsigned int, order )
__field( int, migratetype )
),
TP_fast_assign(
__entry->pfn = page ? page_to_pfn(page) : -1UL;
__entry->order = order;
__entry->migratetype = migratetype;
),
TP_printk("page=%p pfn=%lu order=%d migratetype=%d",
pfn_to_page(__entry->pfn), __entry->pfn,
__entry->order, __entry->migratetype)