Re: kernel 4.0.2+ ext4 corruption

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On 20.05.2015 15:28, Michael Cronenworth wrote:
> On 05/20/2015 05:22 AM, Matthew Miller wrote:
>> Michael, are you able to reproduce this reliably, by any chance, so we
>> have a test case for any potential fix?
> 
> I upgraded to 4.0.4 from a 4.0.0 build I was running. Initially everything seemed fine.
> 
> The corruption occurred several hours later after I started an update run and during 
> the run ldconfig was spitting out "bad ELF" errors. I corrected those that were 
> reported, but upon a reboot it had corrupted even more files and the system was no 
> longer bootable due to corruption to libXfont and a few other libraries.
> 
> I was able to salvage the system after downgrading to 4.0.1 and re-installing rpm, 
> yum, and a couple dozen other packages.
> 
> The problem may only be related to >4.0.2 and mdadm RAID. I won't have time right 
> this minute, but if no one else can easily reproduce it I will setup a VM with two 
> drives and see if that's enough.
> 


ext4: fix data corruption caused by unwritten and delayed extents
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?id=d2dc317

RAID 0, RAID 1, RAID 4, RAID 5, RAID 6 or RAID 10?

Here is RAID1/EXT4, and everything is OK, although the kernel ain't the stock Fedora kernel,
but 4.0.4 with "sched: always use blk_schedule_flush_plug in io_schedule_out"
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/kernel/sched/core.c?id=5596d0d
https://bugzilla.redhat.com/show_bug.cgi?id=1220519


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