On Tue, 17 May 2011 16:10:07 +0400 Jason Tinker <jsntinker@xxxxxxxxx> wrote: > I have encountered a weird bug when trying to use ext4 partition on > top of mdadm RAID5 array. Mdadm array has internal bitmap, and ext4 is > mounted with default options - which means that barriers are enabled. The same combination works perfectly for me on 2.6.38. > When trying to write large enough amount of files system just locks up > indefinitely, only hard reset helps. This seems to happen at random > times, yet consistently after several minutes of usage. > I tried different configuration options and it seems to happen only > when both barriers on ext4 and mdadm's internal bitmaps are enabled. > After disabling ext4 barriers for good (it seemed like a lesser evil) > no lock ups happened for 3 months. > Mdadm is version 3.1.3, kernel is 2.6.32 (rhel6) How about a newer kernel, maybe? -- With respect, Roman
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