Yan Li wrote: > On Thu, 28 Feb 2008 23:20:48 -0800, Andrew Morton wrote: >> On Thu, 28 Feb 2008 19:24:03 +0530 Ritesh Raj Sarraf <rrs@xxxxxxxxxxxxxx> wrote: >>> I noted kernel soft lockup messages on my laptop when doing a lot of I/O >>> (200GB) to a dm-crypt device. It was setup using LUKS. >>> The I/O never got disrupted nor anything failed. Just the messages. > > I met the same problem yesterday. > >> Could be a dm-crypt problem, could be a crypto problem, could even be a >> core block problems. > > I think it's due to heavy encryption computation that run longer than > 10s and triggered the warning. By heavy I mean dm-crypt with > aes-xts-plain, 512b key size. > > This is a typical soft lockup call trace snip from dmesg: > Call Trace: > [<ffffffff882c60b6>] :xts:crypt+0x9d/0xea > [<ffffffff882b5705>] :aes_x86_64:aes_encrypt+0x0/0x5 > [<ffffffff882b5705>] :aes_x86_64:aes_encrypt+0x0/0x5 > [<ffffffff882c622e>] :xts:encrypt+0x41/0x46 > [<ffffffff8828273f>] :dm_crypt:crypt_convert_scatterlist+0x7b/0xc7 > [<ffffffff882828ae>] :dm_crypt:crypt_convert+0x123/0x15d > [<ffffffff88282abd>] :dm_crypt:kcryptd_do_crypt+0x1d5/0x253 > [<ffffffff882828e8>] :dm_crypt:kcryptd_do_crypt+0x0/0x253 > [<ffffffff802448e5>] run_workqueue+0x7f/0x10b > ... (omitted) Please could you try if patch here helps and doesn't cause performance degradation? http://www2.kernel.org/pub/linux/kernel/people/agk/patches/2.6/2.6.25/dm-crypt-add-cond_resched.patch ... > Anybody see a data corruption? It shouldn't cause any corruption of data. Milan -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
