The patch titled
Subject: mm,vmacache: count number of system-wide flushes
has been removed from the -mm tree. Its filename was
mmvmacache-count-number-of-system-wide-flushes.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Davidlohr Bueso <dave@xxxxxxxxxxxx>
Subject: mm,vmacache: count number of system-wide flushes
These flushes deal with sequence number overflows, such as for long lived
threads. These are rare, but interesting from a debugging PoV. As such,
display the number of flushes when vmacache debugging is enabled.
Signed-off-by: Davidlohr Bueso <dbueso@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/vm_event_item.h | 1 +
mm/vmacache.c | 2 ++
mm/vmstat.c | 1 +
3 files changed, 4 insertions(+)
diff -puN include/linux/vm_event_item.h~mmvmacache-count-number-of-system-wide-flushes include/linux/vm_event_item.h
--- a/include/linux/vm_event_item.h~mmvmacache-count-number-of-system-wide-flushes
+++ a/include/linux/vm_event_item.h
@@ -90,6 +90,7 @@ enum vm_event_item { PGPGIN, PGPGOUT, PS
#ifdef CONFIG_DEBUG_VM_VMACACHE
VMACACHE_FIND_CALLS,
VMACACHE_FIND_HITS,
+ VMACACHE_FULL_FLUSHES,
#endif
NR_VM_EVENT_ITEMS
};
diff -puN mm/vmacache.c~mmvmacache-count-number-of-system-wide-flushes mm/vmacache.c
--- a/mm/vmacache.c~mmvmacache-count-number-of-system-wide-flushes
+++ a/mm/vmacache.c
@@ -17,6 +17,8 @@ void vmacache_flush_all(struct mm_struct
{
struct task_struct *g, *p;
+ count_vm_vmacache_event(VMACACHE_FULL_FLUSHES);
+
/*
* Single threaded tasks need not iterate the entire
* list of process. We can avoid the flushing as well
diff -puN mm/vmstat.c~mmvmacache-count-number-of-system-wide-flushes mm/vmstat.c
--- a/mm/vmstat.c~mmvmacache-count-number-of-system-wide-flushes
+++ a/mm/vmstat.c
@@ -900,6 +900,7 @@ const char * const vmstat_text[] = {
#ifdef CONFIG_DEBUG_VM_VMACACHE
"vmacache_find_calls",
"vmacache_find_hits",
+ "vmacache_full_flushes",
#endif
#endif /* CONFIG_VM_EVENTS_COUNTERS */
};
_
Patches currently in -mm which might be from dave@xxxxxxxxxxxx are
origin.patch
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