[Bug 43359] LVM volumes not detected

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=43359





--- Comment #5 from Anonymous Emailer <anonymous@kernel-bugs.osdl.org>  2012-06-14 16:16:35 ---
Reply-To: muthu.lkml@gmail.com

I am using CentOS 6.x and I hit this bug with 3.5-rc2. I tried to look
in to the boot process and found that the initramfs generated from
3.5.-rc2 is not good for lvm root. It was missing /lib/modules/<uname
-r>/kernel/drivers/md/*". Also /sbin/ doesn't have lvm_scan and was
missing a bunch of other files too.

CCing initramfs folks. Any help?



On Sat, Jun 9, 2012 at 11:12 PM,  <bugzilla-daemon@bugzilla.kernel.org> wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=43359
>
>
>
>
>
> --- Comment #1 from François Valenduc <francois.valenduc@tvcablenet.be>  2012-06-10 06:12:06 ---
> This problem seems impossible to bisect. The first run (794c10fa0fa4d) was the
> result of the bisection limited to drivers and fs directories. A second run
> where I also added the block directory lead to a commit related to watchdog,
> which is impossible since I don't use watchdog on my computer.
> A 3rd run on the whole kernel tree leads to this commit:
>
> From 4523e1458566a0e8ecfaff90f380dd23acc44d27 Mon Sep 17 00:00:00 2001
> From: Dave Hansen <dave@linux.vnet.ibm.com>
> Date: Wed, 30 May 2012 07:51:07 -0700
> Subject: [PATCH] mm: fix vma_resv_map() NULL pointer
>
> hugetlb_reserve_pages() can be used for either normal file-backed
> hugetlbfs mappings, or MAP_HUGETLB.  In the MAP_HUGETLB, semi-anonymous
> mode, there is not a VMA around.  The new call to resv_map_put() assumed
> that there was, and resulted in a NULL pointer dereference:
>
> This is also strange because I don't use hugetlb. I can revert this commit but
> it doesn't change anything. Does anybody have an idea on what I could do to
> further investigate this problem.
>
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