linux-ext4 - [PATCH] mke2fs: check that auto-detected blocksize <= sys_page

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Date:	Wed, 08 Jun 2011 11:23:18 +0200
From:	"Yury V. Zaytsev" <yury@...rup.com>
To:	linux-ext4@...r.kernel.org
Subject: [PATCH] mke2fs: check that auto-detected blocksize <= sys_page_size

Hi!

I have recently stumbled upon a RHEL6.1 installation problem on an SSD
drive that was working fine with older kernels, where created file
systems could not be mounted and the installation was aborting.

It turned out that the drive had a firmware bug and was exposing a
minimum_io_size of 8912, whereas my x86_64 system had a page size of
4096 bytes.

mkfs in turn was silently creating file systems with 8912 bytes block
size, because it was auto-detected as opposed to specified via the -b
option from the command line.

This made the problem hard to debug, hence I attach a tentative patch to
fix this issue. I'd like to acknowledge Mike Snitzer for directing me to
this list.

I'm not subscribed, so please CC: me upon replies and be mindful that
it's my first contribution of this kind, so even though I did my best to
do it the right way, I might have screwed something up.

Thanks!

-- 
Sincerely yours,
Yury V. Zaytsev

View attachment "0001-mke2fs-check-that-auto-detected-blocksize-sys_page_s.patch" of type "text/x-patch" (2447 bytes)