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From: Hsin-Yi Wang <hsinyi@chromium.org>
To: Phillip Lougher <phillip@squashfs.org.uk>,
	Matthew Wilcox <willy@infradead.org>,
	Xiongwei Song <Xiongwei.Song@windriver.com>
Cc: Zheng Liang <zhengliang6@huawei.com>,
	Zhang Yi <yi.zhang@huawei.com>, Hou Tao <houtao1@huawei.com>,
	Miao Xie <miaoxie@huawei.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	"linux-mm @ kvack . org" <linux-mm@kvack.org>,
	"squashfs-devel @ lists . sourceforge . net" 
	<squashfs-devel@lists.sourceforge.net>,
	linux-kernel@vger.kernel.org
Subject: [PATCH v2 0/3] Implement readahead for squashfs
Date: Tue, 17 May 2022 16:26:48 +0800	[thread overview]
Message-ID: <20220517082650.2005840-1-hsinyi@chromium.org> (raw)

Commit c1f6925e1091("mm: put readahead pages in cache earlier") requires
fs to implement readahead callback. Otherwise there will be a
performance regression.

Commit 9eec1d897139("squashfs: provide backing_dev_info in order to
disable read-ahead") mitigates the performance drop issue for squashfs
by closing readahead for it.

This series implements readahead callback for squashfs. The previous
discussion are in [1] and [2].

[1] https://lore.kernel.org/all/CAJMQK-g9G6KQmH-V=BRGX0swZji9Wxe_2c7ht-MMAapdFy2pXw@mail.gmail.com/T/
[2] https://lore.kernel.org/linux-mm/Yn5Yij9pRPCzDozt@casper.infradead.org/t/#m4af4473b94f98a4996cb11756b633a07e5e059d1

Hsin-Yi Wang (2):
  Revert "squashfs: provide backing_dev_info in order to disable
    read-ahead"
  squashfs: implement readahead

Phillip Lougher (1):
  squashfs: always build "file direct" version of page actor

 fs/squashfs/Makefile     |  4 +--
 fs/squashfs/file.c       | 77 +++++++++++++++++++++++++++++++++++++++-
 fs/squashfs/page_actor.h | 41 ---------------------
 fs/squashfs/super.c      | 33 -----------------
 4 files changed, 78 insertions(+), 77 deletions(-)

-- 
2.36.0.550.gb090851708-goog


             reply	other threads:[~2022-05-17  8:28 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-17  8:26 Hsin-Yi Wang [this message]
2022-05-17  8:26 ` [PATCH v2 1/3] Revert "squashfs: provide backing_dev_info in order to disable read-ahead" Hsin-Yi Wang
2022-05-17  9:15   ` Xiongwei Song
2022-05-17  8:26 ` [PATCH v2 2/3] squashfs: always build "file direct" version of page actor Hsin-Yi Wang
2022-05-17  8:26 ` [PATCH v2 3/3] squashfs: implement readahead Hsin-Yi Wang
2022-05-17  9:16   ` Xiongwei Song
2022-05-19  7:56     ` Hsin-Yi Wang
2022-05-19  8:09   ` Hsin-Yi Wang
2022-05-20  3:02     ` Phillip Lougher
2022-05-20  7:38       ` Hsin-Yi Wang
2022-05-20 20:21         ` Phillip Lougher
2022-05-23  7:00           ` Hsin-Yi Wang

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