From: Andrew Morton <akpm@linux-foundation.org>
To: Gabriel Krisman Bertazi <krisman@suse.de>
Cc: Michal Hocko <mhocko@suse.com>,
linux-mm@kvack.org, Mel Gorman <mgorman@suse.de>,
Vlastimil Babka <vbabka@suse.cz>, Baoquan He <bhe@redhat.com>
Subject: Re: [PATCH] Revert "mm/page_alloc.c: don't show protection in zone's ->lowmem_reserve[] for empty zone"
Date: Wed, 26 Feb 2025 15:00:54 -0800 [thread overview]
Message-ID: <20250226150054.a40db3fb41148b10da9bdca6@linux-foundation.org> (raw)
In-Reply-To: <87h64gsnd5.fsf@mailhost.krisman.be>
On Wed, 26 Feb 2025 11:05:10 -0500 Gabriel Krisman Bertazi <krisman@suse.de> wrote:
> For reference, I collected vmstat with and without this patch on a
> freshly booted system running intensive randread io from an nvme for 5
> minutes. I got:
>
> rpm-6.12.0-slfo.1.2 -> pgscan_kswapd 5629543865
> Patched -> pgscan_kswapd 33580844
>
> 33M scans is similar to what we had in kernels predating this patch.
> These numbers is fairly representative of the workload on this machine, as
> measured in several runs. So we are talking about a 2-order of
> magnitude increase.
Thanks for adding this detail - I pasted it into the changelog.
I'll queue the patch with a cc:stable. You may wish to send along a
new changelog to fill in additional details resulting from the review
discussion.
next prev parent reply other threads:[~2025-02-26 23:00 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-26 3:22 Gabriel Krisman Bertazi
2025-02-26 6:54 ` Michal Hocko
2025-02-26 10:00 ` Baoquan He
2025-02-26 10:52 ` Michal Hocko
2025-02-26 11:00 ` Michal Hocko
2025-02-26 11:51 ` Baoquan He
2025-02-26 12:01 ` Michal Hocko
2025-02-26 15:57 ` Baoquan He
2025-02-26 17:46 ` Michal Hocko
2025-02-27 9:41 ` Baoquan He
2025-02-27 9:16 ` Vlastimil Babka
2025-02-27 10:24 ` Baoquan He
2025-02-27 13:16 ` Vlastimil Babka
2025-02-27 15:53 ` Baoquan He
2025-02-26 13:07 ` Vlastimil Babka
2025-02-26 16:05 ` Gabriel Krisman Bertazi
2025-02-26 23:00 ` Andrew Morton [this message]
2025-02-26 13:00 ` Vlastimil Babka
2025-02-27 11:50 ` Mel Gorman
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