diff options
| author | Ross Zwisler <[email protected]> | 2016-02-26 15:19:49 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2016-02-27 10:28:52 -0800 |
| commit | 73f34a5e2ceddfca27c999c170620e6354aaf6d7 (patch) | |
| tree | bbadfef9feecde6b2961f248166f7a526004faaa /tools/perf/scripts/python/bin/export-to-postgresql-report | |
| parent | 0a6cf9137ded4856b41910a4336677ee0ffa6736 (diff) | |
ext4: online defrag not supported with DAX
Online defrag operations for ext4 are hard coded to use the page cache.
See ext4_ioctl() -> ext4_move_extents() -> move_extent_per_page()
When combined with DAX I/O, which circumvents the page cache, this can
result in data corruption. This was observed with xfstests ext4/307 and
ext4/308.
Fix this by only allowing online defrag for non-DAX files.
Signed-off-by: Ross Zwisler <[email protected]>
Reviewed-by: Jan Kara <[email protected]>
Cc: Theodore Ts'o <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: Dave Chinner <[email protected]>
Cc: Jens Axboe <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/bin/export-to-postgresql-report')
0 files changed, 0 insertions, 0 deletions