Subject: Re: Wrong atime on recent kernels
From: john stultz <johnstul@us.ibm.com>
To: Petr =?UTF-8?Q?Tit=C4=9Bra?= <P.Titera@century.cz>
Cc: Petr =?UTF-8?Q?Tit=C4=9Bra?= <petr@titera.eu>,
       linux-kernel@vger.kernel.org, "Theodore Ts'o" <tytso@mit.edu>
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	 <1261020388.7245.27.camel@localhost.localdomain>
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Date: Thu, 17 Dec 2009 13:19:08 -0800
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On Thu, 2009-12-17 at 12:04 +0100, Petr Titěra wrote:
> Now when I'm looking through stat /stats.file I was able to find some 
> really old instances of this error from October:
> 
>   File: `/mnt/data/linux-2.6/.git/refs/remotes/origin'
>   Size: 4096            Blocks: 8          IO Block: 4096   directory
> Device: fe00h/65024d    Inode: 130953      Links: 2
> Access: (0775/drwxrwxr-x)  Uid: (    0/    root)   Gid: (    0/    root)
> Access: 2009-12-16 21:21:52.776000002 +0100
> Modify: 2009-10-14 07:57:03.1000000000 +0200
> Change: 2009-10-14 07:57:03.1000000000 +0200
>   File: `/mnt/data/linux-2.6/.git/refs/remotes/origin/master'
>   Size: 41              Blocks: 8          IO Block: 4096   regular file
> Device: fe00h/65024d    Inode: 147522      Links: 1
> Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)
> Access: 2009-10-14 07:57:04.040000000 +0200
> Modify: 2009-10-14 07:57:03.970000000 +0200
> Change: 2009-10-14 07:57:03.1000000000 +0200
> 
> So this happened before but only recently it started to happen in places 
> where it hurts. I found this trange behaviour because I was unable to 
> create initramfs of new kernels. mkinitrd command could not copy files 
> and preserve their times because of timestamp validity check in cp.

Huh. If its really the case, then its not the change I suspect. 

Ted: Have you seen anything like this? Where the sub-second field holds
a full second of time?


> I will try to revert commit you told me and will test.

Thanks, that will help greatly narrow this down.

thanks again
-john


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