Re: Random file system corruption in 3.17 (not BTRFS related...?)

[Juan Orti Alcaine <juan.orti@miceliux.com>]

El 2014-10-14 18:54, Robert White escribió:
> Howdy,
> 
> So I run several gentoo systems and I upgraded two of them to kernel 
> 3.17.0
> 
> One using BTRFS for root.
> One using ext3 for root (via the ext4 driver)
> 
> _Both_ systems exhibited strange behavior (long pauses and then hangs
> requiring hard-power) within several hours. Both then had random
> filesystem damage.
> 
> On the BTRFS system much of my browser settings for firefox were
> trashed, particularly the cookies and saved conifigurations for
> add-ons (like which sites had scripts enabled/disabled in no-script)
> etc.
> 
> On the ext3/4 system there were several corruptions including a
> pipe/special file with a large non-zero size that required I do a
> "fsck -fyD /dev/sda3" to repair. (one comment from fsck was that the
> pipe/special file "looked like a directory" or some such)
> 
> So I can say that corruption is taking place, but I suspect it is
> _not_ happening in the BTRFS specific code.
> 
> (ASIDE: both systems are older amd64 using built-in radeon display 
> hardware.)
> 

I've also experienced Btrfs corruptions with 3.17.0 (Fedora 21 alpha). 
It has happened two times, each one after a clean reinstall and a wipe 
of the old fs. In less than a day, both installations got corrupted and 
the filesystems went readonly. When listing the contents, I saw many 
directories with question marks.

My system has 4 drives and 2 fs:
- 1 SSD in single
- 3 HDD in RAID1

I do readonly snapshots every hour of all the subvolumes, so I have 
hundreds of snapshots.

Now I'm back in 3.16.4 without any problems. I'm trying to reproduce my 
setup in a virtual machine. If the corruption happens again, I'll send 
you more data on this problem.

-- 
Juan Orti
https://miceliux.com