From: "Theodore Y. Ts'o" <tytso@mit.edu>
To: Gao Xiang <hsiangkao@aol.com>
Cc: dsterba@suse.cz, Gao Xiang <gaoxiang25@huawei.com>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Stephen Rothwell <sfr@canb.auug.org.au>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-fsdevel@vger.kernel.org, devel@driverdev.osuosl.org,
LKML <linux-kernel@vger.kernel.org>,
linux-erofs@lists.ozlabs.org, Chao Yu <yuchao0@huawei.com>,
Miao Xie <miaoxie@huawei.com>,
Li Guifu <bluce.liguifu@huawei.com>,
Fang Wei <fangwei1@huawei.com>
Subject: Re: [PATCH v3 23/24] erofs: introduce cached decompression
Date: Mon, 22 Jul 2019 11:12:26 -0400 [thread overview]
Message-ID: <20190722151226.GC5172@mit.edu> (raw)
In-Reply-To: <db672675-c471-5bc8-af15-91c1859e9008@aol.com>
On Mon, Jul 22, 2019 at 10:16:44PM +0800, Gao Xiang wrote:
> OK, I will give a try. One point I think is how to deal with the case
> if there is already cached information when remounting as well as you said.
>
> As the first step, maybe the mount option can be defined as
> allowing/forbiding caching from now on, which can be refined later.
Yes; possible solutions include ignoring the issue (assuming that
cached data structures that "shouldn't" be in the cache given the new
cache strategy will fall out of the cache over time), forcibly
flushing the cache when the caching strategy has changed, and of
course, forbidding caching strategy change at remount time.
Cheers,
- Ted
next prev parent reply other threads:[~2019-07-22 15:13 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-22 2:50 [PATCH v3 00/24] erofs: promote erofs from staging Gao Xiang
2019-07-22 2:50 ` [PATCH v3 01/24] erofs: add on-disk layout Gao Xiang
2019-07-22 3:26 ` Stephen Rothwell
2019-07-22 3:29 ` Gao Xiang
2019-07-22 5:05 ` Greg Kroah-Hartman
2019-07-22 5:24 ` Gao Xiang
2019-07-22 2:50 ` [PATCH v3 02/24] erofs: add erofs in-memory stuffs Gao Xiang
2019-07-22 2:50 ` [PATCH v3 03/24] erofs: add super block operations Gao Xiang
2019-07-22 2:50 ` [PATCH v3 04/24] erofs: add raw address_space operations Gao Xiang
2019-07-22 2:50 ` [PATCH v3 05/24] erofs: add inode operations Gao Xiang
2019-07-22 2:50 ` [PATCH v3 06/24] erofs: support special inode Gao Xiang
2019-07-22 2:50 ` [PATCH v3 07/24] erofs: add directory operations Gao Xiang
2019-07-22 2:50 ` [PATCH v3 08/24] erofs: add namei functions Gao Xiang
2019-07-22 2:50 ` [PATCH v3 09/24] erofs: support tracepoint Gao Xiang
2019-07-22 2:50 ` [PATCH v3 10/24] erofs: update Kconfig and Makefile Gao Xiang
2019-07-22 2:50 ` [PATCH v3 11/24] erofs: introduce xattr & posixacl support Gao Xiang
2019-07-22 2:50 ` [PATCH v3 12/24] erofs: introduce tagged pointer Gao Xiang
2019-07-22 4:39 ` Amir Goldstein
2019-07-22 5:01 ` Gao Xiang
2019-07-22 6:16 ` Amir Goldstein
2019-07-22 6:31 ` Gao Xiang
2019-07-22 14:40 ` Steven Rostedt
2019-07-22 15:33 ` Gao Xiang
2019-07-22 16:35 ` Steven Rostedt
2019-07-22 16:52 ` Gao Xiang
2019-07-22 2:50 ` [PATCH v3 13/24] erofs: add compression indexes support Gao Xiang
2019-07-22 2:50 ` [PATCH v3 14/24] erofs: introduce superblock registration Gao Xiang
2019-07-22 2:50 ` [PATCH v3 15/24] erofs: introduce erofs shrinker Gao Xiang
2019-07-22 2:50 ` [PATCH v3 16/24] erofs: introduce workstation for decompression Gao Xiang
2019-07-22 2:50 ` [PATCH v3 17/24] erofs: introduce per-CPU buffers implementation Gao Xiang
2019-07-22 2:50 ` [PATCH v3 18/24] erofs: introduce pagevec for decompression subsystem Gao Xiang
2019-07-22 2:50 ` [PATCH v3 19/24] erofs: add erofs_allocpage() Gao Xiang
2019-07-22 2:50 ` [PATCH v3 20/24] erofs: introduce generic decompression backend Gao Xiang
2019-07-22 2:50 ` [PATCH v3 21/24] erofs: introduce LZ4 decompression inplace Gao Xiang
2019-07-22 2:50 ` [PATCH v3 22/24] erofs: introduce the decompression frontend Gao Xiang
2019-07-22 2:50 ` [PATCH v3 23/24] erofs: introduce cached decompression Gao Xiang
2019-07-22 10:18 ` David Sterba
2019-07-22 10:58 ` Gao Xiang
2019-07-22 13:25 ` Theodore Y. Ts'o
2019-07-22 14:16 ` Gao Xiang
2019-07-22 15:12 ` Theodore Y. Ts'o [this message]
2019-07-22 16:27 ` Gao Xiang
2019-07-23 12:31 ` David Sterba
2019-07-23 13:30 ` Gao Xiang
2019-07-22 2:50 ` [PATCH v3 24/24] erofs: add document Gao Xiang
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