On Fri, 13 Feb 2009, Jacky Kim wrote:
> Hi,
>
> 1. I test with the origin LV, and don't write to snapshots.
> 2. I don't delete snapshots when copy big files to the origin LV, but do create snapshot sometimes.
> 3. The snapshots have the same chunk size: 4KB or 64KB.
> 4. It seems to work well with 1 snapshot. But it always crashes each time with 2 snapshots.
> 5. I don't resize the origin device and the snapshots.
>
> The latest debug information is as follows:
Ohhh, the last patch from me was wrong, so it could produce a false
positive, so its result is unusable. Apply this on the top of it.
Mikulas
---
drivers/md/dm-snap.c | 1 +
1 file changed, 1 insertion(+)
Index: linux-2.6.28-snap-debug/drivers/md/dm-snap.c
===================================================================
--- linux-2.6.28-snap-debug.orig/drivers/md/dm-snap.c 2009-02-16 08:09:22.000000000 +0100
+++ linux-2.6.28-snap-debug/drivers/md/dm-snap.c 2009-02-16 08:09:47.000000000 +0100
@@ -874,6 +874,7 @@ static struct bio *put_pending_exception
pe->snap->store.check_pending_exception(&pe->snap->store, pe, __LINE__);
primary_pe = pe->primary_pe;
+ pe->primary_pe = NULL;
if (primary_pe) {
if (atomic_read(&primary_pe->ref_count) <= 0 || primary_pe->magic != 0x12345678) {
--
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