From: David Hildenbrand <david@redhat.com>
To: Michal Hocko <mhocko@suse.com>
Cc: Minchan Kim <minchan@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
joaodias@google.com
Subject: Re: [PATCH] mm: be more verbose for alloc_contig_range faliures
Date: Mon, 8 Mar 2021 15:13:35 +0100 [thread overview]
Message-ID: <9f7b4b8a-5317-e382-7f21-01667e017982@redhat.com> (raw)
In-Reply-To: <YEYwdjvYGiZ4crMt@dhcp22.suse.cz>
On 08.03.21 15:11, Michal Hocko wrote:
> On Mon 08-03-21 14:22:12, David Hildenbrand wrote:
>> On 08.03.21 13:49, Michal Hocko wrote:
> [...]
>>> Earlier in the discussion I have suggested dynamic debugging facility.
>>> Documentation/admin-guide/dynamic-debug-howto.rst. Have you tried to
>>> look into that direction?
>>
>> Did you see the previous mail this is based on:
>>
>> https://lkml.kernel.org/r/YEEUq8ZRn4WyYWVx@google.com
>>
>> I agree that "nofail" is misleading. Rather something like
>> "dump_on_failure", just a better name :)
>
> Yeah, I have read through the email thread. I just do not get why we
> cannot make it pr_debug() and add -DDYNAMIC_DEBUG_MODULE for
> page_alloc.c (I haven't checked whether that is possible for built in
> compile units, maybe it is not but from a quick seems it should).
>
> I really do not like this to be a part of the API. alloc_contig_range is
Which API? It does not affect alloc_contig_range() itself, it's used
internally only. Sure, we could simply pr_debug() for each and every
migration failure. As long as it's default-disabled, sure.
I do agree that we should look into properly including this into the
dynamic debugging ifrastructure.
--
Thanks,
David / dhildenb
next prev parent reply other threads:[~2021-03-08 14:14 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-17 16:36 [PATCH] mm: be more verbose for alloc_contig_range faliures Minchan Kim
2021-02-17 16:51 ` David Hildenbrand
2021-02-17 17:26 ` Minchan Kim
2021-02-17 17:34 ` David Hildenbrand
2021-02-17 17:45 ` Minchan Kim
2021-02-18 8:56 ` Michal Hocko
2021-02-18 9:02 ` David Hildenbrand
2021-02-18 9:35 ` Michal Hocko
2021-02-18 9:43 ` David Hildenbrand
2021-02-18 9:59 ` Michal Hocko
2021-02-18 16:19 ` Minchan Kim
2021-02-18 16:26 ` David Hildenbrand
2021-02-18 16:47 ` Minchan Kim
2021-02-18 16:53 ` David Hildenbrand
2021-02-19 9:28 ` Michal Hocko
2021-02-19 9:30 ` David Hildenbrand
2021-02-19 10:02 ` Michal Hocko
2021-02-19 10:34 ` David Hildenbrand
2021-03-02 17:23 ` Minchan Kim
2021-03-04 16:01 ` Minchan Kim
2021-03-04 16:10 ` David Hildenbrand
2021-03-04 16:23 ` Minchan Kim
2021-03-04 16:28 ` David Hildenbrand
2021-03-04 17:11 ` Minchan Kim
2021-03-04 17:23 ` David Hildenbrand
2021-03-04 18:11 ` Minchan Kim
2021-03-04 18:22 ` Minchan Kim
2021-03-08 12:49 ` Michal Hocko
2021-03-08 13:22 ` David Hildenbrand
2021-03-08 14:11 ` Michal Hocko
2021-03-08 14:13 ` David Hildenbrand [this message]
2021-03-08 15:42 ` Michal Hocko
2021-03-08 15:58 ` Minchan Kim
2021-03-08 16:21 ` Michal Hocko
2021-03-08 17:01 ` Minchan Kim
2021-03-08 20:27 ` Minchan Kim
2021-02-18 16:10 ` Minchan Kim
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