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| author | Davidlohr Bueso <dave@stgolabs.net> | 2014-12-12 16:56:10 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-12-13 12:42:48 -0800 |
| commit | f5f302e21257ebb0c074bbafc37606c26d28cc3d (patch) | |
| tree | 9487dd9bdf2df8a1989af3dde28d64b84f04ede5 /mm/vmacache.c | |
| parent | 16a7ade8af3b4ad30aec880177ff291bb5ea86d1 (diff) | |
| download | lwn-f5f302e21257ebb0c074bbafc37606c26d28cc3d.tar.gz lwn-f5f302e21257ebb0c074bbafc37606c26d28cc3d.zip | |
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@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmacache.c')
| -rw-r--r-- | mm/vmacache.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/vmacache.c b/mm/vmacache.c index 9f25af825dec..b6e3662fe339 100644 --- a/mm/vmacache.c +++ b/mm/vmacache.c @@ -17,6 +17,8 @@ void vmacache_flush_all(struct mm_struct *mm) { 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 |