diff options
| author | Steven Whitehouse <swhiteho@redhat.com> | 2013-12-18 14:14:52 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-09 12:24:24 -0800 |
| commit | 8553459e73c6da3e5b9da9239dd8ef017181252a (patch) | |
| tree | e20426b756ab2e9133cb6963e2081f358b00de65 /mm/memcontrol.c | |
| parent | 21b6291b88c534d8c6018ad483e232abab63f644 (diff) | |
GFS2: Fix incorrect invalidation for DIO/buffered I/O
commit dfd11184d894cd0a92397b25cac18831a1a6a5bc upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm/memcontrol.c')
0 files changed, 0 insertions, 0 deletions