linux-kernel - Re: nvme boot problems after merge of mm-stable tree into linux-next

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Message-ID: <58fb32f8-ce1e-913b-3b85-c41b0630d4c6@roeck-us.net>
Date:   Mon, 13 Feb 2023 20:01:33 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Bagas Sanjaya <bagasdotme@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        "linux-next@...r.kernel.org" <linux-next@...r.kernel.org>,
        linux-mm@...ck.org
Subject: Re: nvme boot problems after merge of mm-stable tree into linux-next

On 2/13/23 18:23, Bagas Sanjaya wrote:
> On 2/14/23 00:47, Andrew Morton wrote:
>>> I am having problems booting from nvme in linux-next. Bisect points to 06e5887cdcc11
>>> ("Merge branch 'mm-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm").
>>> The problem was first seen on February 8.
>>>
> 
> Hi,
> 
> Can you please directly test mm-stable tree instead and bisect from there?
> 

I'd love to, but as it turns out today's next release (next-20230213)
bisects to a different merge. Still mm, but this time it is the merge
of mm-everything, and both the merge of mm-stable as well as mm/mm-stable
itself are fine. See below for the updated bisect results. mm/mm-everything
itself (mm-hotfixes-stable-2023-02-13-13-50-593-g48de1df158c9) is fine as well.
The merge of mm-nonmm-stable into linux-next (v6.2-rc7-12363-g214c8cfc3507)
is also fine. However, the merge of mm-everything into linux-next) is broken.

Overall, that suggests that there may have been a change somewhere
else in the kernel which is incompatible with a change in one of
the mm branches. It is interesting that the problem in next-20230210
was seen after the merge of mm-stable, and that it is now seen after
the merge of mm-everything.

Guenter

---
# bad: [09e41676e35ab06e4bce8870ea3bf1f191c3cb90] Add linux-next specific files for 20230213
# good: [4ec5183ec48656cec489c49f989c508b68b518e3] Linux 6.2-rc7
git bisect start 'HEAD' 'v6.2-rc7'
# good: [8b065aee8dfbecc978324b204fc897168c9adcd0] Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git
git bisect good 8b065aee8dfbecc978324b204fc897168c9adcd0
# good: [72655d7bf4966cc46ac85ef74b26eb74e251ae4a] Merge branch 'rcu/next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git
git bisect good 72655d7bf4966cc46ac85ef74b26eb74e251ae4a
# good: [11b208f696c4111c8bd66863b8306d7857266e4c] Merge branch 'staging-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
git bisect good 11b208f696c4111c8bd66863b8306d7857266e4c
# good: [d69b9b369439219613ca6df66745217f1f56a533] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock.git
git bisect good d69b9b369439219613ca6df66745217f1f56a533
# good: [37598f5a9d8b63b91cce0cb6bac5f6374ed1bb80] mlock: convert mlock to vma iterator
git bisect good 37598f5a9d8b63b91cce0cb6bac5f6374ed1bb80
# good: [1c2080951a87c3f146c9f9f837ec3c877d4a3c87] Merge branch 'mm-nonmm-unstable' into mm-everything
git bisect good 1c2080951a87c3f146c9f9f837ec3c877d4a3c87
# good: [d1b7f15191d2c203b48eff421f65effce20faa4b] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/krisman/unicode.git
git bisect good d1b7f15191d2c203b48eff421f65effce20faa4b
# good: [7223173e7652230265ba89c5a12eacab1d416797] Merge branch 'bitmap-for-next' of https://github.com/norov/linux.git
git bisect good 7223173e7652230265ba89c5a12eacab1d416797
# good: [70d207cb345c41262a24973e1a40f5015c2c309f] Merge branch 'for-next/kspp' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git
git bisect good 70d207cb345c41262a24973e1a40f5015c2c309f
# good: [84798f2849942bb5e8817417adfdfa6241df2835] iommufd: Add three missing structures in ucmd_buffer
git bisect good 84798f2849942bb5e8817417adfdfa6241df2835
# good: [e5773cfccc0b3c35cef89129f45087d43c136a2d] Merge branch 'for-next/kspp' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git
git bisect good e5773cfccc0b3c35cef89129f45087d43c136a2d
# good: [77ce632bfb804e4d71bd7aa106cc5b10f164cb14] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jgg/iommufd.git
git bisect good 77ce632bfb804e4d71bd7aa106cc5b10f164cb14
# good: [214c8cfc350729dcce2f2e6d228b996ff568626c] Merge branch 'mm-nonmm-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
git bisect good 214c8cfc350729dcce2f2e6d228b996ff568626c
# bad: [a037e6164093ebb92745768a59e1e2ff8c731d57] Merge branch 'mm-everything' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
git bisect bad a037e6164093ebb92745768a59e1e2ff8c731d57
# first bad commit: [a037e6164093ebb92745768a59e1e2ff8c731d57] Merge branch 'mm-everything' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm