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author | Yan, Zheng <zheng.z.yan@intel.com> | 2013-07-02 08:40:19 +0400 |
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committer | Sage Weil <sage@inktank.com> | 2013-07-04 02:32:56 +0400 |
commit | b415bf4f9fe25f39934f5c464125e4a2dffb6d08 (patch) | |
tree | f38df9c1746a1419e7942afb4534625175a5d353 /COPYING | |
parent | 5446429630257f4723829409337a26c076907d5d (diff) | |
download | linux-b415bf4f9fe25f39934f5c464125e4a2dffb6d08.tar.xz |
ceph: fix pending vmtruncate race
The locking order for pending vmtruncate is wrong, it can lead to
following race:
write wmtruncate work
------------------------ ----------------------
lock i_mutex
check i_truncate_pending check i_truncate_pending
truncate_inode_pages() lock i_mutex (blocked)
copy data to page cache
unlock i_mutex
truncate_inode_pages()
The fix is take i_mutex before calling __ceph_do_pending_vmtruncate()
Fixes: http://tracker.ceph.com/issues/5453
Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: Sage Weil <sage@inktank.com>
Diffstat (limited to 'COPYING')
0 files changed, 0 insertions, 0 deletions