Re: [SCSI REGRESSION] 3.10.2 or 3.10.3: arcmsr failure at bootup/ early userspace transition

From: Bernd Schubert
Date: Thu Aug 01 2013 - 10:55:26 EST

On 07/30/2013 11:20 PM, Nix wrote:
On 30 Jul 2013, Bernd Schubert told this:

On 07/30/2013 02:56 AM, Nix wrote:
On 30 Jul 2013, Douglas Gilbert outgrape:

Please supply the information that Martin Petersen asked

Did it in private IRC (the advantage of working for the same division of
the same company!)

I didn't realise the original fix was actually implemented to allow
Bernd, with a different Areca controller, to boot... obviously, in that
situation, reversion is wrong, since that would just replace one won't-
boot situation with another.

Unless there is very simple fix the commit should reverted, imho. It
would better then to remove write-same support from the md-layer.

I'm not using md on that machine, just LVM. Our suspicion is that ext4
is doing a WRITE SAME for some reason.

I didn't check yet for other cases, mkfs.ext4 does WRITE SAME and with lazy init it also will happen after mounting the file system, while lazy init is running (inode zeroing).

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