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| author | Steven Whitehouse <swhiteho@redhat.com> | 2013-12-18 18:14:52 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-08 21:42:12 +0400 |
| commit | d23a87af40a35e7bedb349d071c4a1c5dcf050e2 (patch) | |
| tree | bb272e54ac0bb2f87bc921ee0d03deb44659b7d9 /Documentation/vm | |
| parent | af7cf2107d3a05709799e441a55c2a646e7b5a45 (diff) | |
| download | linux-d23a87af40a35e7bedb349d071c4a1c5dcf050e2.tar.xz | |
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 'Documentation/vm')
0 files changed, 0 insertions, 0 deletions