All of lore.kernel.org
 help / color / mirror / Atom feed
From: Jan Kara <jack@suse.cz>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: <linux-mm@kvack.org>,
	Michael Stapelberg <stapelberg+linux@google.com>,
	Wu Fengguang <fengguang.wu@intel.com>, Jan Kara <jack@suse.cz>
Subject: [PATCH 0/5 v3] writeback: Fix bandwidth estimates
Date: Tue, 13 Jul 2021 12:36:24 +0200	[thread overview]
Message-ID: <20210713103347.8364-1-jack@suse.cz> (raw)

Hello,

Here is the third revision of the patch series to fix estimate of writeback
throughput when device is not fully busy doing writeback. Michael Stapelberg
has reported that such workload (e.g. generated by linking) tends to push
estimated throughput down to 0 and as a result writeback on the device is
practically stalled.

The first three patches fix the reported issue, the remaining two patches
are unrelated cleanups of problems I've noticed when reading the code.

Andrew, can you please pick up the series? Thanks!

								Honza
Changes since v2:
* Rebased on top of 5.14-rc1
* Fixed compilation failure introduced by patch 5/5

Changes since v1:
* Added comments to better explain the logic
* Added Tested-by tag
* Added WRITE_ONCE calls matching READ_ONCE in patch 5/5


Previous versions:
Link: http://lore.kernel.org/r/20210705161610.19406-1-jack@suse.cz # v1
Link: http://lore.kernel.org/r/20210712165811.13163-1-jack@suse.cz # v2


             reply	other threads:[~2021-07-13 10:36 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-13 10:36 Jan Kara [this message]
2021-07-13 10:36 ` [PATCH 1/5] writeback: Track number of inodes under writeback Jan Kara
2021-07-13 10:36 ` [PATCH 2/5] writeback: Reliably update bandwidth estimation Jan Kara
2021-07-13 10:36 ` [PATCH 3/5] writeback: Fix bandwidth estimate for spiky workload Jan Kara
2021-07-13 10:36 ` [PATCH 4/5] writeback: Rename domain_update_bandwidth() Jan Kara
2021-07-13 10:36 ` [PATCH 5/5] writeback: Use READ_ONCE for unlocked reads of writeback stats Jan Kara
2021-07-13 10:46 ` [PATCH 0/5 v3] writeback: Fix bandwidth estimates Jan Kara

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=20210713103347.8364-1-jack@suse.cz \
    --to=jack@suse.cz \
    --cc=akpm@linux-foundation.org \
    --cc=fengguang.wu@intel.com \
    --cc=linux-mm@kvack.org \
    --cc=stapelberg+linux@google.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.