From: asmadeus@codewreck.org
To: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Cc: Eric Van Hensbergen <ericvh@kernel.org>,
v9fs-developer@lists.sourceforge.net,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
linux_oss@crudebyte.com
Subject: Re: [PATCH v5] fs/9p: remove writeback fid and fix per-file modes
Date: Tue, 25 Apr 2023 20:13:27 +0900 [thread overview]
Message-ID: <ZEe11w5mG_pv5X_o@codewreck.org> (raw)
In-Reply-To: <7686c810-4ed6-9e3a-3714-8b803e2d3c46@wanadoo.fr>
Christophe JAILLET wrote on Tue, Apr 25, 2023 at 09:11:01AM +0200:
> This code looks strange.
> P9_OWRITE is 0x01, so !P9_OWRITE is 0.
> So the code is equivalent to "p9_omode = P9_ORDWR;"
>
> Is it what is expexted?
>
> Maybe
> p9_omode = (p9_omode & ~P9_OWRITE) | P9_ORDWR;
> ?
Since we're discussing tooling, sparse caught this one:
fs/9p/vfs_inode.c:826:38: warning: dubious: x & !y
fs/9p/vfs_inode_dotl.c:291:38: warning: dubious: x & !y
(runing with make `M=fs/9p W=1 C=2` ; unfortunately error code doesn't
reflect a problem so that'll require inspecting output to automate...)
I've tried running scan-build in a very old-fashioned way (getting the
gcc lines from make V=1 and re-running with scan-build) and it had some
arguable warnings (setting `ret = 0` before it is overwritten again is
considered a dead store), but it had some real problems as well so it
might be worth fixing these just to reduce the clutter and run it all
the time.
I'll post a couple of patches tomorrow (unrelated to this)
--
Dominique
next prev parent reply other threads:[~2023-04-25 11:13 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20221217183142.1425132-1-evanhensbergen@icloud.com>
2022-12-18 23:22 ` [PATCH v2 00/10] Performance fixes for 9p filesystem Eric Van Hensbergen
2022-12-18 23:22 ` [PATCH v2 01/10] Adjust maximum MSIZE to account for p9 header Eric Van Hensbergen
2022-12-18 23:22 ` [PATCH v2 02/10] Expand setup of writeback cache to all levels Eric Van Hensbergen
2022-12-18 23:22 ` [PATCH v2 03/10] Consolidate file operations and add readahead and writeback Eric Van Hensbergen
2023-01-24 2:43 ` asmadeus
2023-01-24 3:03 ` Eric Van Hensbergen
2022-12-18 23:22 ` [PATCH v2 04/10] Remove unnecessary superblock flags Eric Van Hensbergen
2022-12-18 23:22 ` [PATCH v2 05/10] allow disable of xattr support on mount Eric Van Hensbergen
2022-12-18 23:22 ` [PATCH v2 06/10] fix bug in client create for .L Eric Van Hensbergen
2022-12-18 23:22 ` [PATCH v2 07/10] Add additional debug flags and open modes Eric Van Hensbergen
2022-12-18 23:22 ` [PATCH v2 08/10] Add new mount modes Eric Van Hensbergen
2023-01-24 3:35 ` Amir Goldstein
2022-12-18 23:22 ` [PATCH v2 09/10] fix error reporting in v9fs_dir_release Eric Van Hensbergen
2022-12-18 23:22 ` [PATCH v2 10/10] writeback mode fixes Eric Van Hensbergen
2023-01-23 16:31 ` [PATCH v2 00/10] Performance fixes for 9p filesystem Christian Schoenebeck
2023-01-24 2:33 ` evanhensbergen
2023-01-24 2:49 ` asmadeus
2023-01-24 2:38 ` [PATCH v3 00/11] " Eric Van Hensbergen
2023-01-24 2:38 ` [PATCH v3 01/11] Adjust maximum MSIZE to account for p9 header Eric Van Hensbergen
2023-01-24 2:38 ` [PATCH v3 02/11] Expand setup of writeback cache to all levels Eric Van Hensbergen
2023-01-24 2:38 ` [PATCH v3 03/11] Consolidate file operations and add readahead and writeback Eric Van Hensbergen
2023-01-24 2:38 ` [PATCH v3 04/11] Remove unnecessary superblock flags Eric Van Hensbergen
2023-01-24 2:38 ` [PATCH v3 05/11] allow disable of xattr support on mount Eric Van Hensbergen
2023-01-24 2:38 ` [PATCH v3 06/11] fix bug in client create for .L Eric Van Hensbergen
2023-01-24 2:38 ` [PATCH v3 07/11] Add additional debug flags and open modes Eric Van Hensbergen
2023-01-24 2:38 ` [PATCH v3 08/11] Add new mount modes Eric Van Hensbergen
2023-01-24 2:38 ` [PATCH v3 09/11] fix error reporting in v9fs_dir_release Eric Van Hensbergen
2023-01-24 2:38 ` [PATCH v3 10/11] writeback mode fixes Eric Van Hensbergen
2023-01-24 2:38 ` [PATCH v3 11/11] Fix revalidate Eric Van Hensbergen
2023-02-02 11:27 ` [PATCH v3 00/11] Performance fixes for 9p filesystem Christian Schoenebeck
2023-02-03 19:12 ` Eric Van Hensbergen
2023-02-04 13:40 ` Christian Schoenebeck
2023-02-04 21:38 ` Eric Van Hensbergen
2023-02-05 16:37 ` Eric Van Hensbergen
2023-02-06 13:20 ` Christian Schoenebeck
2023-02-06 13:37 ` Eric Van Hensbergen
2023-02-18 0:33 ` [PATCH v4 " Eric Van Hensbergen
2023-02-18 0:33 ` [PATCH v4 01/11] net/9p: Adjust maximum MSIZE to account for p9 header Eric Van Hensbergen
2023-02-18 7:50 ` asmadeus
2023-02-18 0:33 ` [PATCH v4 02/11] fs/9p: Expand setup of writeback cache to all levels Eric Van Hensbergen
2023-02-18 8:57 ` asmadeus
2023-02-18 0:33 ` [PATCH v4 03/11] fs/9p: Consolidate file operations and add readahead and writeback Eric Van Hensbergen
2023-02-18 9:24 ` asmadeus
2023-02-18 16:17 ` Eric Van Hensbergen
2023-02-18 16:19 ` Eric Van Hensbergen
2023-02-18 20:35 ` asmadeus
2023-02-27 2:50 ` [PATCH v5 3/11] " Eric Van Hensbergen
2023-02-18 0:33 ` [PATCH v4 04/11] fs/9p: Remove unnecessary superblock flags Eric Van Hensbergen
2023-02-18 9:33 ` asmadeus
2023-02-18 16:24 ` Eric Van Hensbergen
2023-02-18 20:30 ` asmadeus
2023-02-18 0:33 ` [PATCH v4 05/11] fs/9p: allow disable of xattr support on mount Eric Van Hensbergen
2023-02-18 7:52 ` asmadeus
2023-02-18 0:33 ` [PATCH v4 06/11] net/9p: fix bug in client create for .L Eric Van Hensbergen
2023-02-18 8:01 ` asmadeus
2023-02-18 0:33 ` [PATCH v4 07/11] 9p: Add additional debug flags and open modes Eric Van Hensbergen
2023-02-18 8:05 ` asmadeus
2023-02-27 2:53 ` [PATCH v5 7/11] " Eric Van Hensbergen
2023-02-18 0:33 ` [PATCH v4 08/11] fs/9p: Add new mount modes Eric Van Hensbergen
2023-02-18 8:46 ` asmadeus
2023-02-27 2:55 ` [PATCH v5 8/11] " Eric Van Hensbergen
2023-02-18 0:33 ` [PATCH v4 09/11] fs/9p: fix error reporting in v9fs_dir_release Eric Van Hensbergen
2023-02-18 8:49 ` asmadeus
2023-02-18 0:33 ` [PATCH v4 10/11] fs/9p: writeback mode fixes Eric Van Hensbergen
2023-02-18 8:38 ` asmadeus
2023-02-18 10:01 ` asmadeus
2023-02-18 12:15 ` asmadeus
2023-02-18 16:40 ` Eric Van Hensbergen
2023-02-18 20:29 ` asmadeus
2023-03-21 1:12 ` Eric Van Hensbergen
2023-02-18 19:58 ` Christian Schoenebeck
2023-02-18 22:24 ` Eric Van Hensbergen
2023-02-18 23:40 ` asmadeus
2023-02-18 23:52 ` Eric Van Hensbergen
2023-03-27 2:59 ` [PATCH v5] fs/9p: remove writeback fid and fix per-file modes Eric Van Hensbergen
2023-04-25 7:11 ` Christophe JAILLET
2023-04-25 11:13 ` asmadeus [this message]
2023-04-26 0:01 ` Eric Van Hensbergen
2023-02-18 0:33 ` [PATCH v4 11/11] fs/9p: Fix revalidate Eric Van Hensbergen
2023-02-18 8:55 ` asmadeus
2023-02-18 7:48 ` [PATCH v4 00/11] Performance fixes for 9p filesystem asmadeus
2023-02-19 21:36 ` Christian Schoenebeck
2023-02-20 1:13 ` Eric Van Hensbergen
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