linux-ext4 - Re: [RFC][PATCH] ext2: Resolve i_nlink race in ext2

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Message-ID: <AANLkTikmgaoBsf5neCxM9jYCJGkdAS1QC2k0zKUTW2=8@mail.gmail.com>
Date:	Fri, 25 Feb 2011 08:38:15 +0100
From:	Marco Stornelli <marco.stornelli@...il.com>
To:	Josh Hunt <johunt@...mai.com>
Cc:	Jan Kara <jack@...e.cz>, Al Viro <viro@...iv.linux.org.uk>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
	"sandeen@...hat.com" <sandeen@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>
Subject: Re: [RFC][PATCH] ext2: Resolve i_nlink race in ext2_rename

Hi,

2011/2/24 Josh Hunt <johunt@...mai.com>:
> Jan
>
> I'm not seeing the problem with your patch as was expected since we're
> not messing with i_nlink anymore. Al suggested marking the inode as
> dirty where we were previously doing the old_inode dec. I believe this
> is needed as well since we are updating it's ctime. I've attached a
> version marking the inode dirty and it also fixes the comment making
> reference to calling inode_dec_link_count().
>
> I'm not completely clear on the historical reasons for messing with the
> link count of old_inode in the first place. It was just to simulate the
> linking and unlinking of the old_inode?
>
> Thanks
> Josh
>

can we share your test/benchmark? I'd like to add it to my test suite
as no-regression test.

Marco
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