Hi Run the same workload and try this patch (also keep the previous patch applied). Note, that the patch is not correct (it leaks a little bit of memory when you deactivate a snapshot, also it will cause an error if you rmmod dm-snapshot), I just want to see if you get any more crashes with this. Mikulas > My workload in case of 32b involved only one volume and 3 snapshots to > this volume. I wrote only to origin volume (with use fstress) and I > created and deleted these snapshots from time to time. Snapshots was > mount with rw option. > > In case 64b I had 2 volume and 10 snapshots for each volume.I created > and deleted these snapshots from time to time as well. I wrote only to > origin volumes (with use dd) > > I don`t remember exactly but in case test with 1 snapshot per volume all > was working correctly through a few hours and I stopped this test but in > case my above tests system was working correctly through a few minutes. > > Mikulas Patocka wrote: > >> Hi Mikulas > >> > >> I send to You (in attachment) files from both kernels.Thank You for help > >> > >> Best > >> > > > > Thanks. Does your workload involve just one snapshot of a given volume, or > > do you have more snapshots of the same volume? Do you write only to origin > > or to both origin and the snapshot or only to the snapshot? > > > > I will send you some patch with more debug tests soon, just answer these > > questions first, so that I can make it. > > > > Mikulas --- drivers/md/dm-snap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) Index: linux-2.6.27-clean/drivers/md/dm-snap.c =================================================================== --- linux-2.6.27-clean.orig/drivers/md/dm-snap.c 2008-10-21 23:38:49.000000000 +0200 +++ linux-2.6.27-clean/drivers/md/dm-snap.c 2008-10-21 23:39:09.000000000 +0200 @@ -736,12 +736,12 @@ static void snapshot_dtr(struct dm_targe __free_exceptions(s); - mempool_destroy(s->pending_pool); + /*mempool_destroy(s->pending_pool);*/ dm_put_device(ti, s->origin); dm_put_device(ti, s->cow); - kfree(s); + /*kfree(s);*/ } /* -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
