linux-ext4 - Re: prevent parallel resizers and fix some error handling in resize

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Message-ID: <CAOQ4uxj7C7L_27nEcn5ge6aD=2RLgipGOa_GBhhEeafC1H0HHQ@mail.gmail.com>
Date:	Mon, 18 Jul 2011 09:16:19 +0300
From:	Amir Goldstein <amir73il@...il.com>
To:	Yongqiang Yang <xiaoqiangnk@...il.com>
Cc:	linux-ext4@...r.kernel.org, aedilger@...il.com
Subject: Re: prevent parallel resizers and fix some error handling in resize

On Mon, Jul 18, 2011 at 5:52 AM, Yongqiang Yang <xiaoqiangnk@...il.com> wrote:
> Hi,
>
>  This patch series prevents parallel resizer and fixes some error handling in
> resize code.  Besides these, some code is simplified so that the code can be
> used easily in new resize implementation.

You should probably mention that "new resize implementation" means:
let the kernel do all the resize work, gaining fast multi group resize,
flex_bg layout, and uninit block groups.
The new kernel resize implementation also prepares the ground for
supporting resize with features like big_alloc, 64bit and exclude_bitmap.

You should probably also mention that you have already completed the
"new resize implementation" and that you will post it shortly ;-)

>
>  The patches are tested by resize2fs and e2fsck -fn.
>
> [PATCH 01/12] ext4: prevent parallel resizers by atomic bit ops
> [PATCH 02/12] ext4: prevent a fs with errors from being resized
> [PATCH 03/12] ext4: prevent a fs without journal from being resized
> [PATCH 04/12] ext4: rename ext4_add_groupblocks() to
> [PATCH 05/12] ext4: let ext4_group_add_blocks return an error code
> [PATCH 06/12] ext4: let ext4_group_add_blocks() handle 0 blocks
> [PATCH 07/12] ext4: fix a typo in ext4_group_extend()
> [PATCH 08/12] ext4: let setup_new_group_blocks set multi-bits each
> [PATCH 09/12] ext4: simplify journal handling in
> [PATCH 10/12] ext4: remove lock_buffer in bclean() and
> [PATCH 11/12] ext4: simplify parameters of add_new_gdb()
> [PATCH 12/12] ext4: simplify parameters of reserve_backup_gdb()
>
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