From: Rik van Riel <riel@surriel.com>
To: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org, kernel-team@fb.com, niketa@fb.com,
akpm@linux-foundation.org, sjenning@redhat.com,
ddstreet@ieee.org, konrad.wilk@oracle.com, hannes@cmpxchg.org
Subject: [PATCH 0/2] mm,swap: skip swap readahead for instant IO (like zswap)
Date: Mon, 21 Sep 2020 22:01:46 -0400 [thread overview]
Message-ID: <20200922020148.3261797-1-riel@surriel.com> (raw)
Both with frontswap/zswap, and with some extremely fast IO devices,
swap IO will be done before the "asynchronous" swap_readpage() call
has returned.
In that case, doing swap readahead only wastes memory, increases
latency, and increases the chances of needing to evict something more
useful from memory. In that case, just skip swap readahead.
next reply other threads:[~2020-09-22 2:02 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-22 2:01 Rik van Riel [this message]
2020-09-22 2:01 ` [PATCH 1/2] mm,swap: extract swap single page readahead into its own function Rik van Riel
2020-09-23 6:32 ` Christoph Hellwig
2020-09-23 8:02 ` Hillf Danton
2020-09-22 2:01 ` [PATCH 2/2] mm,swap: skip swap readahead if page was obtained instantaneously Rik van Riel
2020-09-22 3:13 ` huang ying
2020-09-22 11:33 ` Rik van Riel
2020-09-23 6:35 ` Christoph Hellwig
2020-09-22 17:12 ` [PATCH 0/2] mm,swap: skip swap readahead for instant IO (like zswap) Andrew Morton
2020-10-05 17:32 ` Rik van Riel
2020-10-09 14:38 ` Rik van Riel
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=20200922020148.3261797-1-riel@surriel.com \
--to=riel@surriel.com \
--cc=akpm@linux-foundation.org \
--cc=ddstreet@ieee.org \
--cc=hannes@cmpxchg.org \
--cc=kernel-team@fb.com \
--cc=konrad.wilk@oracle.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=niketa@fb.com \
--cc=sjenning@redhat.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