From: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
To: Christoph Hellwig <hch@infradead.org>
Cc: viro@zeniv.linux.org.uk, akpm@linux-foundation.org,
linux-kernel@vger.kernel.org, Trond.Myklebust@netapp.com
Subject: Re: [PATCH 3/6] vfs: add __d_instantiate() helper
Date: Thu, 16 Oct 2008 05:39:56 +0900 [thread overview]
Message-ID: <87wsg9oan7.fsf@devron.myhome.or.jp> (raw)
In-Reply-To: <20081015194119.GA24892@infradead.org> (Christoph Hellwig's message of "Wed, 15 Oct 2008 15:41:19 -0400")
Christoph Hellwig <hch@infradead.org> writes:
> On Wed, Oct 15, 2008 at 10:58:10PM +0900, OGAWA Hirofumi wrote:
>>
>> This adds __d_instantiate() for users which is already taking
>> dcache_lock, and replace with it.
>>
>> The part of d_add_ci() isn't equivalent. But it should be needed
>> fsnotify_d_instantiate() actually, because the path is to add the
>> inode to negative dentry. fsnotify_d_instantiate() should be called
>> after change from negative to positive.
>>
>> __d_instantiate_unique() and d_materialise_unique() does opencoded
>> optimized version. From history, it seems a intent, so just add comment.
>
> Looks good, but I think those "optimized' version should also be
> converted, a single if shouldn't matter with todays branch predictors.
Me too.
Trond, do you care the following convert? E.g.
in d_materialise_unique():
from
dentry->d_inode = NULL;
goto found_lock;
to
__d_instantiate(dentry, NULL);
goto found_lock;
--
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
next prev parent reply other threads:[~2008-10-15 20:40 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-15 13:58 [PATCH 1/6] vfs: replace parent == dentry->d_parent by IS_ROOT() OGAWA Hirofumi
2008-10-15 13:58 ` [PATCH 2/6] vfs: add d_ancestor() OGAWA Hirofumi
2008-10-15 13:58 ` [PATCH 3/6] vfs: add __d_instantiate() helper OGAWA Hirofumi
2008-10-15 13:58 ` [PATCH 4/6] vfs: remove unnecessary fsnotify_d_instantiate() OGAWA Hirofumi
2008-10-15 13:58 ` [PATCH 5/6] vfs: remove LOOKUP_PARENT from non LOOKUP_PARENT lookup OGAWA Hirofumi
2008-10-15 13:58 ` [PATCH 6/6] vfs: add LOOKUP_RENAME_NEW intent OGAWA Hirofumi
2008-10-15 19:37 ` Christoph Hellwig
2008-10-15 20:13 ` OGAWA Hirofumi
2008-10-15 19:44 ` [PATCH 5/6] vfs: remove LOOKUP_PARENT from non LOOKUP_PARENT lookup Christoph Hellwig
2008-10-15 21:43 ` OGAWA Hirofumi
2008-10-15 19:43 ` [PATCH 4/6] vfs: remove unnecessary fsnotify_d_instantiate() Christoph Hellwig
2008-10-15 20:16 ` OGAWA Hirofumi
2008-10-15 20:20 ` Christoph Hellwig
2008-10-15 19:41 ` [PATCH 3/6] vfs: add __d_instantiate() helper Christoph Hellwig
2008-10-15 20:39 ` OGAWA Hirofumi [this message]
2008-10-15 20:47 ` Trond Myklebust
2008-10-15 21:31 ` OGAWA Hirofumi
2008-10-15 19:53 ` [PATCH 2/6] vfs: add d_ancestor() Christoph Hellwig
2008-10-15 21:42 ` OGAWA Hirofumi
2008-10-15 19:45 ` [PATCH 1/6] vfs: replace parent == dentry->d_parent by IS_ROOT() Christoph Hellwig
2008-10-15 20:24 ` OGAWA Hirofumi
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