Re: [Bug 43359] LVM volumes not detected

[Muthu Kumar <muthu.lkml@xxxxxxxxx>]

Thanks to Harald and Bryn, I narrowed it to local changes in my system.

On Mon, Jun 11, 2012 at 9:56 PM, Muthu Kumar <muthu.lkml@xxxxxxxxx> wrote:
> 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@xxxxxxxxxxxxxxxxxxx> wrote:
>> https://bugzilla.kernel.org/show_bug.cgi?id=43359
>>
>>
>>
>>
>>
>> --- Comment #1 from François Valenduc <francois.valenduc@xxxxxxxxxxxxx>  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@xxxxxxxxxxxxxxxxxx>
>> 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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