From bc8f167f9c4656b7a972936237e9c38e6ab80c67 Mon Sep 17 00:00:00 2001 From: JackieLiu Date: Mon, 28 Nov 2016 16:19:20 +0800 Subject: 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 Reviewed-by: Song Liu Signed-off-by: JackieLiu Signed-off-by: Shaohua Li --- drivers/md/raid5-cache.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) (limited to 'drivers/md/raid5-cache.c') 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; -- cgit v1.2.3