https://bugzilla.kernel.org/show_bug.cgi?id=118041 Bug ID: 118041 Summary: My tricky script involving zram and device mapper hangs on "mount" Product: File System Version: 2.5 Kernel Version: 4.4.8-grsec,4.1.9 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: ext4 Assignee: fs_ext4@xxxxxxxxxxxxxxxxxxxx Reporter: vi0oss@xxxxxxxxx Regression: No As far as I remember, I have implemented and used the script on 3.8.3 (or 3.7.5?) successfully. But after upgrading to other kernel version it broke: now "mount" hangs (in uninterruptible sleep), consuming 100% CPU and eating all memory. The script: --- modprobe zram num_devices=2 sleep 1 echo 1500M > /sys/block/zram0/disksize echo 100M > /sys/block/zram1/disksize MS=$(blockdev --getsize /dev/zram0) WS=$(blockdev --getsize /dev/zram1) DS=$(blockdev --getsize /dev/mapper/cryptie4-ff) MN=$(printf '%d:%d' `stat -Lc '0x%t 0x%T' /dev/zram0`) WN=$(printf '%d:%d' `stat -Lc '0x%t 0x%T' /dev/zram1`) DN=$(printf '%d:%d' `stat -Lc '0x%t 0x%T' /dev/mapper/cryptie4-ff`) pv /dev/mapper/cryptie4-ff | hashed_update /dev/stdin NULL /dev/zram0 /tmp/ff.md5 65536 dmsetup create ff --table "0 $MS snapshot-origin $MN" # /dev/mapper/ff /mnt/ff ext4 noatime,noauto 0 0 mount /mnt/ff # after this command ff_snap should begin working dmsetup create ff_disk --table "0 $DS snapshot-origin $DN" --- So far I have just abandoned the script and hasn't experimented more. Shall I try to isolate and maybe bisect the problem? -- 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
