linux-ext4 - Re: ext4: removal of alloc_sem locks from block allocation paths

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Date:	Wed, 23 Mar 2011 23:04:22 +0200
From:	"Amir G." <amir73il@...rs.sourceforge.net>
To:	tytso@....edu
Cc:	Ext4 Developers List <linux-ext4@...r.kernel.org>,
	Yongqiang Yang <xiaoqiangnk@...il.com>
Subject: Re: ext4: removal of alloc_sem locks from block allocation paths

Hi Ted,

I have been running some more tests, including 1K, with no problems observed
and Yongqiang has also reviewed the patches.

Is there any chance to merge these patches in current merge window?

Thanks,
Amir.

On Sun, Mar 20, 2011 at 11:32 PM,  <amir73il@...rs.sourceforge.net> wrote:
> The purpose of this patch set is the removal of grp->alloc_sem locks
> from block allocation paths.
>
> This resulting code is cleaner and should perform better in concurrent
> allocating tasks workloads.
>
> I ran several xfstests runs with these patches (4K block only).
> I tried several online resizes and verifyed that both in-core and on-disk
> group counters are correct.
>
> ext4: move ext4_add_groupblocks() to mballoc.c
> ext4: implement ext4_add_groupblocks() by freeing blocks
> ext4: synchronize ext4_mb_init_group() with buddy page lock
> ext4: teach ext4_mb_init_cache() to skip uptodate buddy caches
> ext4: remove alloc_semp
>
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