linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Bagas Sanjaya <bagasdotme@gmail.com>
To: Linux regressions mailing list <regressions@lists.linux.dev>,
	Alistair Popple <apopple@nvidia.com>,
	Felix Kuehling <Felix.Kuehling@amd.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Marco <rodomar705@protonmail.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Linux Memory Management List <linux-mm@kvack.org>
Subject: Re: Fwd: Kernel memory management bug at mm/migrate.c:662 when flushing caches
Date: Wed, 2 Aug 2023 18:47:07 +0700	[thread overview]
Message-ID: <307e4377-f52f-40dc-23ec-90a75668cb99@gmail.com> (raw)
In-Reply-To: <32c3d93c-c320-0f88-87db-003f51bfc039@leemhuis.info>

On 02/08/2023 18:25, Linux regression tracking (Thorsten Leemhuis) wrote:
> On 02.08.23 13:08, Bagas Sanjaya wrote:
>>
>> I notice a regression report on Bugzilla [1]. Quoting from it:
>>
>>> I hit this kernel bug on the latest 6.3.9 kernel after executing this script to cleanup hugepages from the kernel before booting up a Windows 11 VM with QEMU (otherwise I don't have enough contiguous memory to allocate the pages to the VM)
>>>
>>> snip
>>> if [[ $VM_ACTION == 'prepare' ]];
>>> then
>>>     sync
>>>     echo 3 > /proc/sys/vm/drop_caches
>>>     echo 1 > /proc/sys/vm/compact_memory
>>> endsnip
>>>
>>> Attached is the full QEMU script that I used. I do use ZFS as a root filesystem, as you can see from the loaded modules.
> 
> Bagas, FWIW, I'd totally understand if developers will ignore this
> (remains to be seen if that is the case, maybe we are lucky and somebody
> will take a look), as I think you for now shouldn't have forwarded this
> for two reasons:
> 
> * 6.3.y is old and EOL; testing mainline or at least a fresh 6.4.y
> kernel) would have been a must here.
> * with out-of-tree modules like ZFS anything can happen, the user is own
> its own.
> 

I have already asked the reporter to try reproducing this with
"officially-supported" other filesystems (e.g. ext4, xfs, or btrfs).
The reporter also stated that he was now trying the mainline (but not
rc release, just latest stable).

> As I can see from the bug both things will likely clear up soon, hence
> waiting would have been wise here.
> 
> Please in the future do not forward such bugs, as developers might
> otherwise start to ignore mails wrt to regression tracking -- which we
> really need to avoid, as that will make things a lot harder.
> 

Thanks for another tip!

-- 
An old man doll... just what I always wanted! - Clara


  reply	other threads:[~2023-08-02 11:47 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-08-02 11:08 Fwd: Kernel memory management bug at mm/migrate.c:662 when flushing caches Bagas Sanjaya
2023-08-02 11:25 ` Linux regression tracking (Thorsten Leemhuis)
2023-08-02 11:47   ` Bagas Sanjaya [this message]
2023-08-02 12:38 ` Bagas Sanjaya

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=307e4377-f52f-40dc-23ec-90a75668cb99@gmail.com \
    --to=bagasdotme@gmail.com \
    --cc=Felix.Kuehling@amd.com \
    --cc=akpm@linux-foundation.org \
    --cc=apopple@nvidia.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=regressions@lists.linux.dev \
    --cc=rodomar705@protonmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).