On 09/02/2010 03:22 PM, Tejun Heo wrote: > Hello, > > On 09/01/2010 09:15 AM, Kiyoshi Ueda wrote: >> I don't see any obvious problem on this patch. >> However, I hit a NULL pointer dereference below when I use a mpath >> device with barrier option of ext3. I'm investigating the cause now. >> (Also I'm not sure the cause of the hang which Mike is hitting yet.) >> >> I tried on the commit 28dd53b26d362c16234249bad61db8cbd9222d0b of >> git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc.git flush-fua. >> >> # mke2fs -j /dev/mapper/mpatha >> # mount -o barrier=1 /dev/mapper/mpatha /mnt/0 >> # dd if=/dev/zero of=/mnt/0/a bs=512 count=1 >> # sync > > Hmm... I'm trying to reproduce this problem but hasn't been successful > yet. > >> BUG: unable to handle kernel NULL pointer dereference at 0000000000000078 >> IP: [<ffffffffa0070ec3>] scsi_finish_command+0xa3/0x120 [scsi_mod] > > Can you please ask gdb which source line this is? Ooh, never mind. Reproduced it. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
