From: Joakim Tjernlund Date: Thu, 7 Oct 2010 16:01:44 +0000 (+0200) Subject: jffs2: Fix serious write stall due to erase X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=81cfc9f;p=deliverable%2Flinux.git jffs2: Fix serious write stall due to erase Drop the alloc_sem before erasing flash in jffs2_garbage_collect_pass(). Otherwise writes are put on hold until the erase has finised. Signed-off-by: Joakim Tjernlund Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse --- diff --git a/fs/jffs2/gc.c b/fs/jffs2/gc.c index 846a79452497..31dce611337c 100644 --- a/fs/jffs2/gc.c +++ b/fs/jffs2/gc.c @@ -219,13 +219,14 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c) if (!list_empty(&c->erase_complete_list) || !list_empty(&c->erase_pending_list)) { spin_unlock(&c->erase_completion_lock); + mutex_unlock(&c->alloc_sem); D1(printk(KERN_DEBUG "jffs2_garbage_collect_pass() erasing pending blocks\n")); - if (jffs2_erase_pending_blocks(c, 1)) { - mutex_unlock(&c->alloc_sem); + if (jffs2_erase_pending_blocks(c, 1)) return 0; - } + D1(printk(KERN_DEBUG "No progress from erasing blocks; doing GC anyway\n")); spin_lock(&c->erase_completion_lock); + mutex_lock(&c->alloc_sem); } /* First, work out which block we're garbage-collecting */