From: Jens Axboe <axboe@kernel.dk>
To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-mm@kvack.org
Cc: hannes@cmpxchg.org, clm@fb.com, jack@suse.cz
Subject: [PATCH 0/6] More graceful flusher thread memory reclaim wakeup
Date: Tue, 19 Sep 2017 13:53:01 -0600 [thread overview]
Message-ID: <1505850787-18311-1-git-send-email-axboe@kernel.dk> (raw)
We've had some issues with writeback in presence of memory reclaim
at Facebook, and this patch set attempts to fix it up. The real
functional change is the last patch in the series, the first 5 are
prep and cleanup patches.
The basic idea is that we have callers that call
wakeup_flusher_threads() with nr_pages == 0. This means 'writeback
everything'. For memory reclaim situations, we can end up queuing
a TON of these kinds of writeback units. This can cause softlockups
and further memory issues, since we allocate huge amounts of
struct wb_writeback_work to handle this writeback. Handle this
situation more gracefully.
--
Jens Axboe
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next reply other threads:[~2017-09-19 19:53 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-19 19:53 Jens Axboe [this message]
2017-09-19 19:53 ` [PATCH 1/6] buffer: cleanup free_more_memory() flusher wakeup Jens Axboe
2017-09-19 20:05 ` Johannes Weiner
2017-09-20 14:17 ` Jan Kara
2017-09-20 15:18 ` Jens Axboe
2017-09-19 19:53 ` [PATCH 2/6] fs-writeback: provide a wakeup_flusher_threads_bdi() Jens Axboe
2017-09-19 20:05 ` Johannes Weiner
2017-09-20 14:19 ` Jan Kara
2017-09-19 19:53 ` [PATCH 3/6] page-writeback: pass in '0' for nr_pages writeback in laptop mode Jens Axboe
2017-09-19 20:06 ` Johannes Weiner
2017-09-20 14:35 ` Jan Kara
2017-09-20 15:19 ` Jens Axboe
2017-09-19 19:53 ` [PATCH 4/6] fs-writeback: make wb_start_writeback() static Jens Axboe
2017-09-19 20:07 ` Johannes Weiner
2017-09-20 14:35 ` Jan Kara
2017-09-19 19:53 ` [PATCH 5/6] fs-writeback: move nr_pages == 0 logic to one location Jens Axboe
2017-09-19 20:07 ` Johannes Weiner
2017-09-20 14:41 ` Jan Kara
2017-09-20 15:05 ` Jens Axboe
2017-09-20 15:36 ` Jan Kara
2017-09-20 15:40 ` Jens Axboe
2017-09-19 19:53 ` [PATCH 6/6] fs-writeback: only allow one inflight and pending !nr_pages flush Jens Axboe
2017-09-19 20:18 ` Johannes Weiner
2017-09-19 20:39 ` Jens Axboe
2017-09-20 1:57 ` Jens Axboe
2017-09-20 3:10 ` Amir Goldstein
2017-09-20 4:13 ` Jens Axboe
2017-09-20 6:05 ` Amir Goldstein
2017-09-20 12:35 ` Jens Axboe
2017-09-20 14:43 ` Jan Kara
2017-09-20 19:29 ` [PATCH 0/6] More graceful flusher thread memory reclaim wakeup John Stoffel
2017-09-20 19:32 ` Jens Axboe
2017-09-20 23:11 ` Johannes Weiner
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=1505850787-18311-1-git-send-email-axboe@kernel.dk \
--to=axboe@kernel.dk \
--cc=clm@fb.com \
--cc=hannes@cmpxchg.org \
--cc=jack@suse.cz \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
/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;
as well as URLs for NNTP newsgroup(s).