linux-ext4 - Re: [Bug 14739] BUG: scheduling while atomic: nfsd/3369/0x00000002

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Message-ID: <20091207170933.GA16078@skywalker.linux.vnet.ibm.com>
Date:	Mon, 7 Dec 2009 22:39:33 +0530
From:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:	bugzilla-daemon@...zilla.kernel.org
Cc:	linux-ext4@...r.kernel.org, Mingming <cmm@...ibm.com>
Subject: Re: [Bug 14739] BUG: scheduling while atomic: nfsd/3369/0x00000002

On Sat, Dec 05, 2009 at 05:28:13PM +0000, bugzilla-daemon@...zilla.kernel.org wrote:
> http://bugzilla.kernel.org/show_bug.cgi?id=14739
> 
> 
> Trond Myklebust <trond.myklebust@....uio.no> changed:
> 
>            What    |Removed                     |Added
> ----------------------------------------------------------------------------
>                  CC|                            |trond.myklebust@....uio.no
>           Component|NFS                         |ext4
>          AssignedTo|trond.myklebust@....uio.no  |fs_ext4@...nel-bugs.osdl.or
>                    |                            |g
> 
> 
> 
> 
> --- Comment #1 from Trond Myklebust <trond.myklebust@....uio.no>  2009-12-05 17:28:12 ---
> Hmm... This looks to me like it is rather an ext4 bug. Reassigning to
> the ext4 folks for the moment.
> 

Hmm we are doing dquot_reserve_space with i_block_reservation_lock held.
ie

spin_lock(&EXT4_I(inode)->i_block_reservation_lock);  
- vfs_dq_reserve_block
  - down_read(&sb_dqopt(inode->i_sb)->dqptr_sem)


Adding Mingming to CC:
-aneesh
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