From: Ted Ts'o <tytso@mit.edu>
To: Yongqiang Yang <xiaoqiangnk@gmail.com>
Cc: linux-ext4@vger.kernel.org, adilger@dilger.ca,
amir73il@gmail.com, tm@tao.ma
Subject: Re: [PATCH v2 01/11] ext4: prevent parallel resizers by atomic bit ops
Date: Tue, 26 Jul 2011 21:38:22 -0400 [thread overview]
Message-ID: <20110727013822.GD19851@thunk.org> (raw)
In-Reply-To: <1311048137-16400-2-git-send-email-xiaoqiangnk@gmail.com>
On Tue, Jul 19, 2011 at 12:02:07PM +0800, Yongqiang Yang wrote:
> Before this patch, parallel resizers are allowed and protected by a mutex lock,
> actually, there is no need to support parallel resizer, so this patch prevents
> parallel resizers by atmoic bit ops, like lock_page() and unlock_page() do.
>
> To do this, the patch removed the mutex lock s_resize_lock from struct ext4_sb_info
> and added a unsigned long field named s_resize_flags which inidicates if there is
> a resizer.
>
> Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com>
Thanks, added to the ext4 patch.
- Ted
next prev parent reply other threads:[~2011-07-27 1:38 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-19 4:02 ext4: prevent parallel resizers and fix some error handling in resize Yongqiang Yang
2011-07-19 4:02 ` [PATCH v2 01/11] ext4: prevent parallel resizers by atomic bit ops Yongqiang Yang
2011-07-27 1:38 ` Ted Ts'o [this message]
2011-07-19 4:02 ` [PATCH v2 02/11] ext4: prevent a fs with errors from being resized Yongqiang Yang
2011-07-27 1:42 ` Ted Ts'o
2011-07-19 4:02 ` [PATCH v2 03/11] ext4: rename ext4_add_groupblocks() to ext4_group_add_blocks() Yongqiang Yang
2011-07-27 1:45 ` Ted Ts'o
2011-07-19 4:02 ` [PATCH v2 04/11] ext4: let ext4_group_add_blocks() return an error code Yongqiang Yang
2011-07-27 1:49 ` Ted Ts'o
2011-07-19 4:02 ` [PATCH v2 05/11] ext4: let ext4_group_add_blocks() handle 0 blocks quickly Yongqiang Yang
2011-07-27 1:52 ` Ted Ts'o
2011-07-19 4:02 ` [PATCH v2 06/11] ext4: fix a typo in ext4_group_extend() Yongqiang Yang
2011-07-27 1:54 ` Ted Ts'o
2011-07-19 4:02 ` [PATCH v2 07/11] ext4: let setup_new_group_blocks() set multi-bits each time Yongqiang Yang
2011-07-27 2:15 ` [PATCH] ext4: let setup_new_group_blocks() set multiple bits at a time Theodore Ts'o
2011-07-19 4:02 ` [PATCH v2 08/11] ext4: simplify journal handling in setup_new_group_blocks() Yongqiang Yang
2011-07-27 2:23 ` Ted Ts'o
2011-07-19 4:02 ` [PATCH v2 09/11] ext4: remove lock_buffer in bclean() and setup_new_group_blocks() Yongqiang Yang
2011-07-28 0:45 ` Ted Ts'o
2011-07-19 4:02 ` [PATCH v2 10/11] ext4: simplify parameters of add_new_gdb() Yongqiang Yang
2011-07-28 1:21 ` [PATCH -v3] " Theodore Ts'o
2011-07-19 4:02 ` [PATCH v2 11/11] ext4: simplify parameters of reserve_backup_gdb() Yongqiang Yang
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