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| author | Guoqing Jiang <gqjiang@suse.com> | 2019-06-14 11:10:36 +0200 |
|---|---|---|
| committer | Song Liu <songliubraving@fb.com> | 2019-06-21 01:36:00 +0200 |
| commit | 963c555e75b033202dd76cf6325a7b7c83d08d5f (patch) | |
| tree | 093639f1a814ce053bee95459f4f9c242dfc72ea /drivers/md/md.h | |
| parent | md/raid1: fix potential data inconsistency issue with write behind device (diff) | |
| download | linux-963c555e75b033202dd76cf6325a7b7c83d08d5f.tar.xz linux-963c555e75b033202dd76cf6325a7b7c83d08d5f.zip | |
md: introduce mddev_create/destroy_wb_pool for the change of member device
Previously, we called rdev_init_wb to avoid potential data
inconsistency when array is created.
Now, we need to call the function and create mempool if a
device is added or just be flaged as "writemostly". So
mddev_create_wb_pool is introduced and called accordingly.
And for safety reason, we mark implicit GFP_NOIO allocation
scope for create mempool during mddev_suspend/mddev_resume.
And mempool should be removed conversely after remove a
member device or its's "writemostly" flag, which is done
by call mddev_destroy_wb_pool.
Reviewed-by: NeilBrown <neilb@suse.com>
Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Diffstat (limited to 'drivers/md/md.h')
| -rw-r--r-- | drivers/md/md.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/md/md.h b/drivers/md/md.h index d449d514cff9..10f98200e2f8 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -730,6 +730,8 @@ extern struct bio *bio_alloc_mddev(gfp_t gfp_mask, int nr_iovecs, extern void md_reload_sb(struct mddev *mddev, int raid_disk); extern void md_update_sb(struct mddev *mddev, int force); extern void md_kick_rdev_from_array(struct md_rdev * rdev); +extern void mddev_create_wb_pool(struct mddev *mddev, struct md_rdev *rdev, + bool is_suspend); struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr); struct md_rdev *md_find_rdev_rcu(struct mddev *mddev, dev_t dev); |