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| author | Steven Whitehouse <swhiteho@redhat.com> | 2013-12-18 09:14:52 -0500 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2013-12-20 05:41:21 -0500 |
| commit | dfd11184d894cd0a92397b25cac18831a1a6a5bc (patch) | |
| tree | b9b52451fc269f124312b91d6da6a5c894f4e6b9 /tools/perf/scripts/python/futex-contention.py | |
| parent | 502be2a32f09f388e4ff34ef2e3ebcabbbb261da (diff) | |
GFS2: Fix incorrect invalidation for DIO/buffered I/O
In patch 209806aba9d540dde3db0a5ce72307f85f33468f we allowed
local deferred locks to be granted against a cached exclusive
lock. That opened up a corner case which this patch now
fixes.
The solution to the problem is to check whether we have cached
pages each time we do direct I/O and if so to unmap, flush
and invalidate those pages. Since the glock state machine
normally does that for us, mostly the code will be a no-op.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python/futex-contention.py')
0 files changed, 0 insertions, 0 deletions