From: Tim Chen <tim.c.chen@linux.intel.com>
To: Hugh Dickins <hughd@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH 14/14] tmpfs: no need to use i_lock
Date: Tue, 31 May 2011 09:08:10 -0700 [thread overview]
Message-ID: <1306858090.2577.147.camel@schen9-DESK> (raw)
In-Reply-To: <alpine.LSU.2.00.1105301754050.5482@sister.anvils>
On Mon, 2011-05-30 at 17:55 -0700, Hugh Dickins wrote:
> 2.6.36's 7e496299d4d2 to make tmpfs scalable with percpu_counter used
> inode->i_lock in place of sbinfo->stat_lock around i_blocks updates;
> but that was adverse to scalability, and unnecessary, since info->lock
> is already held there in the fast paths.
>
> Remove those uses of i_lock, and add info->lock in the three error
> paths where it's then needed across shmem_free_blocks(). It's not
> actually needed across shmem_unacct_blocks(), but they're so often
> paired that it looks wrong to split them apart.
>
> Signed-off-by: Hugh Dickins <hughd@google.com>
> Cc: Tim Chen <tim.c.chen@linux.intel.com>
> ---
Acked.
Tim Chen
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next prev parent reply other threads:[~2011-05-31 16:10 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-31 0:33 [PATCH 0/14] mm: tmpfs and trunc changes, affecting drm Hugh Dickins
2011-05-31 0:35 ` [PATCH 1/14] mm: invalidate_mapping_pages flush cleancache Hugh Dickins
2011-05-31 15:49 ` Dan Magenheimer
2011-05-31 17:05 ` Hugh Dickins
2011-05-31 21:08 ` Chris Mason
2011-05-31 22:01 ` Hugh Dickins
2011-05-31 0:36 ` [PATCH 2/14] mm: move vmtruncate_range to truncate.c Hugh Dickins
2011-06-01 0:36 ` Christoph Hellwig
2011-05-31 0:39 ` [PATCH 3/14] tmpfs: take control of its truncate_range Hugh Dickins
2011-06-01 0:39 ` Christoph Hellwig
2011-06-01 16:58 ` Hugh Dickins
2011-06-03 5:16 ` Christoph Hellwig
2011-06-06 5:37 ` Hugh Dickins
2011-05-31 0:40 ` [PATCH 4/14] tmpfs: add shmem_read_mapping_page_gfp Hugh Dickins
2011-06-01 0:42 ` Christoph Hellwig
2011-06-01 17:02 ` Hugh Dickins
2011-05-31 0:42 ` [PATCH 5/14] drm/ttm: use shmem_read_mapping_page Hugh Dickins
2011-05-31 0:43 ` [PATCH 6/14] drm/i915: " Hugh Dickins
2011-05-31 0:45 ` [PATCH 7/14] drm/i915: adjust to new truncate_range Hugh Dickins
2011-06-01 0:43 ` Christoph Hellwig
2011-06-01 17:04 ` Hugh Dickins
2011-05-31 0:46 ` [PATCH 8/14] drm/i915: more struct_mutex locking Hugh Dickins
2011-05-31 0:48 ` [PATCH 9/14] mm: cleanup descriptions of filler arg Hugh Dickins
2011-05-31 0:49 ` [PATCH 10/14] mm: truncate functions are in truncate.c Hugh Dickins
2011-05-31 0:51 ` [PATCH 11/14] mm: tidy vmtruncate_range and related functions Hugh Dickins
2011-05-31 0:52 ` [PATCH 12/14] mm: consistent truncate and invalidate loops Hugh Dickins
2011-05-31 0:54 ` [PATCH 13/14] mm: pincer in truncate_inode_pages_range Hugh Dickins
2011-05-31 0:55 ` [PATCH 14/14] tmpfs: no need to use i_lock Hugh Dickins
2011-05-31 16:08 ` Tim Chen [this message]
2011-06-06 4:21 [PATCH 0/14] mm: tmpfs and trunc changes, affecting drm Hugh Dickins
2011-06-06 4:42 ` [PATCH 14/14] tmpfs: no need to use i_lock Hugh Dickins
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