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| author | JackieLiu <liuyun01@kylinos.cn> | 2016-11-28 11:19:20 +0300 |
|---|---|---|
| committer | Shaohua Li <shli@fb.com> | 2016-11-30 01:46:22 +0300 |
| commit | bc8f167f9c4656b7a972936237e9c38e6ab80c67 (patch) | |
| tree | 5a8e38d74ff8ffb0e3916bbf977e2c34b4134e66 /drivers/md | |
| parent | fc833c2a2f4129c42efdaed64b9eb6e9ae5fdcee (diff) | |
| download | linux-bc8f167f9c4656b7a972936237e9c38e6ab80c67.tar.xz | |
md/raid5-cache: release the stripe_head at the appropriate location
If we released the 'stripe_head' in r5c_recovery_flush_log,
ctx->cached_list will both release the data-parity stripes and
data-only stripes, which will become empty.
And we also need to use the data-only stripes in
r5c_recovery_rewrite_data_only_stripes, so we should wait util rewrite
data-only stripes is done before releasing them.
Reviewed-by: Zhengyuan Liu <liuzhengyuan@kylinos.cn>
Reviewed-by: Song Liu <songliubraving@fb.com>
Signed-off-by: JackieLiu <liuyun01@kylinos.cn>
Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/raid5-cache.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/md/raid5-cache.c b/drivers/md/raid5-cache.c index 5ef20c57731f..7b9149ef685c 100644 --- a/drivers/md/raid5-cache.c +++ b/drivers/md/raid5-cache.c @@ -1948,7 +1948,7 @@ static void r5c_recovery_load_one_stripe(struct r5l_log *log, static int r5c_recovery_flush_log(struct r5l_log *log, struct r5l_recovery_ctx *ctx) { - struct stripe_head *sh, *next; + struct stripe_head *sh; int ret = 0; /* scan through the log */ @@ -1977,11 +1977,9 @@ static int r5c_recovery_flush_log(struct r5l_log *log, r5c_recovery_replay_stripes(&ctx->cached_list, ctx); /* load data-only stripes to stripe cache */ - list_for_each_entry_safe(sh, next, &ctx->cached_list, lru) { + list_for_each_entry(sh, &ctx->cached_list, lru) { WARN_ON(!test_bit(STRIPE_R5C_CACHING, &sh->state)); r5c_recovery_load_one_stripe(log, sh); - list_del_init(&sh->lru); - raid5_release_stripe(sh); ctx->data_only_stripes++; } @@ -2061,7 +2059,7 @@ static int r5c_recovery_rewrite_data_only_stripes(struct r5l_log *log, struct r5l_recovery_ctx *ctx) { - struct stripe_head *sh; + struct stripe_head *sh, *next; struct mddev *mddev = log->rdev->mddev; struct page *page; @@ -2073,7 +2071,7 @@ r5c_recovery_rewrite_data_only_stripes(struct r5l_log *log, } ctx->seq += 10; - list_for_each_entry(sh, &ctx->cached_list, lru) { + list_for_each_entry_safe(sh, next, &ctx->cached_list, lru) { struct r5l_meta_block *mb; int i; int offset; @@ -2119,6 +2117,9 @@ r5c_recovery_rewrite_data_only_stripes(struct r5l_log *log, sh->log_start = ctx->pos; ctx->pos = write_pos; ctx->seq += 1; + + list_del_init(&sh->lru); + raid5_release_stripe(sh); } __free_page(page); return 0; |