diff options
| author | Song Liu <songliubraving@fb.com> | 2016-11-19 03:46:50 +0300 |
|---|---|---|
| committer | Shaohua Li <shli@fb.com> | 2016-11-19 04:13:49 +0300 |
| commit | 3bddb7f8f264ec58dc86e11ca97341c24f9d38f6 (patch) | |
| tree | 350e69ab8b594d2ce9eaa833e04294a939b8c044 /drivers/md/raid5.h | |
| parent | 5aabf7c49d9ebe54a318976276b187637177a03e (diff) | |
| download | linux-3bddb7f8f264ec58dc86e11ca97341c24f9d38f6.tar.xz | |
md/r5cache: handle FLUSH and FUA
With raid5 cache, we committing data from journal device. When
there is flush request, we need to flush journal device's cache.
This was not needed in raid5 journal, because we will flush the
journal before committing data to raid disks.
This is similar to FUA, except that we also need flush journal for
FUA. Otherwise, corruptions in earlier meta data will stop recovery
from reaching FUA data.
slightly changed the code by Shaohua
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md/raid5.h')
| -rw-r--r-- | drivers/md/raid5.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h index a698113c6188..d13fe45d6960 100644 --- a/drivers/md/raid5.h +++ b/drivers/md/raid5.h @@ -376,6 +376,7 @@ enum { STRIPE_R5C_FULL_STRIPE, /* in r5c cache (to-be/being handled or * in conf->r5c_full_stripe_list) */ + STRIPE_R5C_PREFLUSH, /* need to flush journal device */ }; #define STRIPE_EXPAND_SYNC_FLAGS \ |