[Bug 992480] Re: fsck.btrfs of a 1TB volume triggers OOM kill on a 1GB RAM machine. (32-bit)

[Arie Skliarouk]

Same story, 4TB volume on a 4GB RAM machine. (64-bit).

btrfs-tools  version  0.19+20100601-3ubuntu3  (as provided by ubuntu
12.04)

The reason I want to do btrfsck as there is a subvolume I can not delete
anymore:

/sbin/btrfs subvolume delete backup_2012-05-17
Delete subvolume '/backups/backup_2012-05-17'
ERROR: cannot delete '/backups/backup_2012-05-17'

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Title:
  fsck.btrfs of a 1TB volume triggers OOM kill on a 1GB RAM machine.
  (32-bit)

Status in “btrfs-tools” package in Ubuntu:
  Confirmed

Bug description:
  fsck.btrfs of a 1TB volume triggers OOM kill on a 1GB RAM machine.
  (32-bit)

  Thats about all there is to say:

  sudo fsck -v /dev/sdd1
  fsck from util-linux 2.20.1
  fsck: Warning... fsck.btrfs for device /dev/sdd1 exited with signal 9.

  May  1 17:49:10 lifelesswks kernel: [639863.533203] Out of memory: Kill process 32192 (fsck.btrfs) score 846 or sacrifice child
  May  1 17:49:10 lifelesswks kernel: [639863.533210] Killed process 32192 (fsck.btrfs) total-vm:2555884kB, anon-rss:772228kB, file-rss:0kB

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