https://bugzilla.kernel.org/show_bug.cgi?id=56821 Theodore Tso <tytso@xxxxxxx> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |tytso@xxxxxxx --- Comment #2 from Theodore Tso <tytso@xxxxxxx> 2013-04-19 17:32:54 --- This should allow your system not to crash. echo 0 > /sys/fs/ext4/<dev>/extent_max_zeroout_kb The failure which you are showing seems to be one where your SCSI controller and/or your SCSI disks are freaking out when ext4 tries to zero out a block range by calling sb_issue_zeroout(). The block layer will translate this into a TRIM command or a SCSI WRITE SAME command for those devices which support this, so that blocks can be efficiently zeroed out. It looks like the block device layer translated this to a standard SCSI WRITE(10) command which is getting issued to both disks at the same time (I assume you are using a software raid via an md device?). I suspect this is a case where ext4 is enabling a new block device optimization interface, and this is interacting badly with your hardware or your block device driver. So we need to figure out what is actually causing the feature, so we can some how automatically blacklist whatever is failing. In the mean time, you can force off the optimization at the ext4 layer by setting extent_max_zeroout_kb to zero. Hopefully we can figure out a better way of disabling the optimization at a lower level (so you can get the benefits of minimizing extent tree fragmentation without causing your raid array to hang), and some way of disabling some level of optimization or hardware breakage workaround automatically. mptscsih: ioc0: attempting task abort! (sc=ffff8803ec450f00) sd 6:0:1:0: [sdb] CDB: Write(10): 2a 00 12 60 a0 a8 00 00 40 00 mptbase: ioc0: LogInfo(0x31140000): Originator={PL}, Code={IO Executed}, SubCode(0x0000) cb_idx mptscsih_io_done mptscsih: ioc0: task abort: SUCCESS (rv=2002) (sc=ffff8803ec450f00) mptscsih: ioc0: attempting task abort! (sc=ffff8803ec450900) sd 6:0:0:0: [sda] CDB: Write(10): 2a 00 12 60 a0 a8 00 00 40 00 mptbase: ioc0: LogInfo(0x31140000): Originator={PL}, Code={IO Executed}, SubCode(0x0000) cb_idx mptscsih_io_done mptscsih: ioc0: task abort: SUCCESS (rv=2002) (sc=ffff8803ec450900) -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
