From: Matt Fleming <mfleming@cloudflare.com>
To: Vlastimil Babka <vbabka@suse.cz>
Cc: Yu Zhao <yuzhao@google.com>, Michal Hocko <mhocko@suse.com>,
Andrew Morton <akpm@linux-foundation.org>,
David Rientjes <rientjes@google.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Link Lin <linkl@google.com>,
Mel Gorman <mgorman@techsingularity.net>
Subject: Re: [PATCH mm-unstable v1] mm/page_alloc: try not to overestimate free highatomic
Date: Wed, 23 Oct 2024 10:25:43 +0100 [thread overview]
Message-ID: <CAGis_TUHyH8mM4q+pWJH+LfYchQkjL6Pap4sNfLA=HRqg50KAQ@mail.gmail.com> (raw)
In-Reply-To: <97ccf48e-f30c-4abd-b8ff-2b5310a8b60f@suse.cz>
On Wed, Oct 23, 2024 at 8:35 AM Vlastimil Babka <vbabka@suse.cz> wrote:
>
> I thought the alloc demand is only blocked on the pessimistic watermark
> calculation. Usable free pages exist, but the allocation is not allowed to
> use them.
I'm confused -- I thought the problem was the inverse of your
statement: the allocation is attempted because
__zone_watermark_unusable_free() claims the highatomic pages are free
but they're not?
next prev parent reply other threads:[~2024-10-23 9:26 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-20 5:13 Yu Zhao
2024-10-21 8:13 ` Michal Hocko
2024-10-21 17:10 ` Yu Zhao
2024-10-21 17:25 ` Michal Hocko
2024-10-21 17:47 ` Yu Zhao
2024-10-22 10:53 ` Vlastimil Babka
2024-10-23 6:36 ` Yu Zhao
2024-10-23 7:34 ` Vlastimil Babka
2024-10-23 9:25 ` Matt Fleming [this message]
2024-10-23 9:44 ` Vlastimil Babka
2024-10-24 4:35 ` Yu Zhao
2024-10-24 8:16 ` Vlastimil Babka
2024-10-24 21:15 ` Yu Zhao
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