From: David Hildenbrand <david@redhat.com>
To: Minchan Kim <minchan@kernel.org>, Michal Hocko <mhocko@suse.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-mm <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
John Dias <joaodias@google.com>, Jason Baron <jbaron@akamai.com>
Subject: Re: [PATCH v2] mm: page_alloc: dump migrate-failed pages
Date: Wed, 10 Mar 2021 09:20:40 +0100 [thread overview]
Message-ID: <5f0e17f2-b161-f0f1-65a4-a7b3af4d2cce@redhat.com> (raw)
In-Reply-To: <YEh4doXvyuRl5BDB@google.com>
On 10.03.21 08:42, Minchan Kim wrote:
> On Tue, Mar 09, 2021 at 08:15:41AM -0800, Minchan Kim wrote:
>
> < snip >
>
>>> [...]
>>>> +void dump_migrate_failure_pages(struct list_head *page_list)
>>>> +{
>>>> + DEFINE_DYNAMIC_DEBUG_METADATA(descriptor,
>>>> + "migrate failure");
>>>> + if (DYNAMIC_DEBUG_BRANCH(descriptor) &&
>>>> + alloc_contig_ratelimit()) {
>>>> + struct page *page;
>>>> +
>>>> + WARN(1, "failed callstack");
>>>> + list_for_each_entry(page, page_list, lru)
>>>> + dump_page(page, "migration failure");
>>>> + }
>>>
>>> Apart from the above, do we have to warn for something that is a
>>> debugging aid? A similar concern wrt dump_page which uses pr_warn and
>>
>> Make sense.
>>
>>> page owner is using even pr_alert.
>>> Would it make sense to add a loglevel parameter both into __dump_page
>>> and dump_page_owner?
>>
>> Let me try it.
>
> I looked though them and made first draft to clean them up.
>
> It's bigger than my initial expectaion because there are many callsites
> to use dump_page and stack_trace_print inconsistent loglevel.
> Since it's not a specific problem for this work, I'd like to deal with
> it as separate patchset since I don't want to be stuck on here for my
> initial goal.
Why the need to rush regarding your series?
If it will clean up your patch significantly, then I think doing the
cleanups first is the proper way to go.
I really don't get why this is a real problem.
--
Thanks,
David / dhildenb
next prev parent reply other threads:[~2021-03-10 8:20 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-08 20:20 [PATCH v2] mm: page_alloc: dump migrate-failed pages Minchan Kim
2021-03-08 21:29 ` kernel test robot
2021-03-08 22:29 ` Minchan Kim
2021-03-09 0:41 ` [kbuild-all] " Rong Chen
2021-03-09 2:23 ` Minchan Kim
2021-03-09 0:21 ` Andrew Morton
2021-03-09 2:21 ` Minchan Kim
2021-03-09 0:30 ` kernel test robot
2021-03-09 0:30 ` [RFC PATCH] mm: page_alloc: alloc_contig_ratelimit() can be static kernel test robot
2021-03-09 9:32 ` [PATCH v2] mm: page_alloc: dump migrate-failed pages Michal Hocko
2021-03-09 16:15 ` Minchan Kim
2021-03-09 16:32 ` Michal Hocko
2021-03-09 17:27 ` Minchan Kim
2021-03-10 13:04 ` Michal Hocko
2021-03-10 15:59 ` Minchan Kim
2021-03-10 7:42 ` Minchan Kim
2021-03-10 8:20 ` David Hildenbrand [this message]
2021-03-10 15:45 ` Minchan Kim
2021-03-10 13:07 ` Michal Hocko
2021-03-10 16:05 ` Minchan Kim
2021-03-10 16:46 ` Michal Hocko
2021-03-10 17:06 ` Minchan Kim
2021-03-10 18:07 ` Minchan Kim
2021-03-10 13:26 ` Matthew Wilcox
2021-03-10 13:54 ` Michal Hocko
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