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 - 12:21:51 EST

On 08/01/2013 06:04 PM, Nix wrote:
On 1 Aug 2013, Bernd Schubert verbalised:

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).

Well, it'll happen the first few times you mount the fs. If your fs is
years old (as mine are) the inode tables will probably have been
initialized by now!

I'm frequently doing tests with millions of files and reformating is ways faster than deleting the all these files.
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