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authorJoakim Tjernlund <Joakim.Tjernlund@transmode.se>2010-10-07 18:01:44 +0200
committerDavid Woodhouse <David.Woodhouse@intel.com>2010-10-25 01:06:22 +0100
commit81cfc9f1f4ad8d335367bb393bd042cc45b00047 (patch)
tree9ba0193e5ba52abe543b12cde711fc061043ad76
parent733daa52b8d358e7c18be7fb9f82afc0619408f4 (diff)
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 <Joakim.Tjernlund@transmode.se> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
-rw-r--r--fs/jffs2/gc.c7
1 files changed, 4 insertions, 3 deletions
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 */