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| author | Song Liu <songliubraving@fb.com> | 2016-11-17 15:24:41 -0800 |
|---|---|---|
| committer | Shaohua Li <shli@fb.com> | 2016-11-18 13:27:24 -0800 |
| commit | 2c7da14b90a01e48b17a028de6050a796cfd6d8d (patch) | |
| tree | 69f8c6710e71f270146978d7e99744962a5eadc8 /drivers/md/raid5.h | |
| parent | a39f7afde358ca89e9fc09a5525d3f8631a98a3a (diff) | |
| download | linux-2c7da14b90a01e48b17a028de6050a796cfd6d8d.tar.bz2 | |
md/r5cache: sysfs entry journal_mode
With write cache, journal_mode is the knob to switch between
write-back and write-through.
Below is an example:
root@virt-test:~/# cat /sys/block/md0/md/journal_mode
[write-through] write-back
root@virt-test:~/# echo write-back > /sys/block/md0/md/journal_mode
root@virt-test:~/# cat /sys/block/md0/md/journal_mode
write-through [write-back]
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 35b4c0f0a850..a698113c6188 100644 --- a/drivers/md/raid5.h +++ b/drivers/md/raid5.h @@ -773,4 +773,5 @@ extern void r5c_make_stripe_write_out(struct stripe_head *sh); extern void r5c_flush_cache(struct r5conf *conf, int num); extern void r5c_check_stripe_cache_usage(struct r5conf *conf); extern void r5c_check_cached_full_stripe(struct r5conf *conf); +extern struct md_sysfs_entry r5c_journal_mode; #endif |