From: Mingming Cao <cmm@us.ibm.com>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: tytso@mit.edu, sandeen@redhat.com, linux-ext4@vger.kernel.org
Subject: Re: [PATCH -V3 09/11] ext4: Fix ext4 nomballoc allocator for ENOSPC
Date: Thu, 28 Aug 2008 22:06:14 -0700 [thread overview]
Message-ID: <1219986374.16004.9.camel@mingming-laptop> (raw)
In-Reply-To: <20080829034451.GA6444@skywalker>
在 2008-08-29五的 09:14 +0530，Aneesh Kumar K.V写道：
> On Thu, Aug 28, 2008 at 02:57:49PM -0700, Mingming Cao wrote:
> >
> > From: Mingming Cao <cmm@us.ibm.com>
> >
> > ext4: Fix ext4 nomballoc allocator for ENOSPC
> >
> > We run into ENOSPC error on nonmballoc ext4, even when there is free blocks
> > on the filesystem.
> >
> > The problem is triggered in the case the goal block group has 0 free blocks
> > , and the rest block groups are skipped due to the check of "free_blocks
> > < windowsz/2".
>
> The goal block group had free blocks < windowsz .
>
Hmm, if the goal block group had free blocks, why allocation failed
(reservation is turned off by setting my_rsv as NULL)? I wonder if there
is other threads trying to allocating in the same goal block group at
the same time, steal the last free blocks?
Mingming
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next prev parent reply other threads:[~2008-08-29 5:06 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-27 15:28 [PATCH -V3 01/11] percpu_counters: make fbc->count read atomic on 32 bit architecture Aneesh Kumar K.V
2008-08-27 15:28 ` [PATCH -V3 02/11] ext4: Make sure all the block allocation paths reserve blocks Aneesh Kumar K.V
2008-08-27 15:28 ` [PATCH -V3 03/11] ext4: Retry block reservation Aneesh Kumar K.V
2008-08-27 15:28 ` [PATCH -V3 04/11] ext4: Add percpu dirty block accounting Aneesh Kumar K.V
2008-08-27 15:28 ` [PATCH -V3 05/11] ext4: Switch to non delalloc mode when we are low on free blocks count Aneesh Kumar K.V
2008-08-27 15:28 ` [PATCH -V3 06/11] ext4: Update meta-data reservation with delalloc Aneesh Kumar K.V
2008-08-27 15:28 ` [PATCH -V3 07/11] ext4: request for blocks with ar.excepted_group = -1 Aneesh Kumar K.V
2008-08-27 15:28 ` [PATCH -V3 08/11] ext4: Signed arithematic fix Aneesh Kumar K.V
2008-08-27 15:28 ` [PATCH -V3 09/11] ext4: Fix ext4 nomballoc allocator for ENOSPC Aneesh Kumar K.V
2008-08-27 15:28 ` [PATCH -V3 10/11] ext4: Add inode to journal handle after block allocation for ordered mode Aneesh Kumar K.V
2008-08-27 15:28 ` [PATCH -V3 11/11] ext4: Retry block allocation if we have free blocks left Aneesh Kumar K.V
2008-08-28 21:57 ` [PATCH -V3 09/11] ext4: Fix ext4 nomballoc allocator for ENOSPC Mingming Cao
2008-08-29 3:44 ` Aneesh Kumar K.V
2008-08-29 4:14 ` Aneesh Kumar K.V
2008-08-29 5:02 ` Mingming Cao
2008-08-29 5:06 ` Mingming Cao [this message]
2008-08-29 8:25 ` Aneesh Kumar K.V
2008-08-28 21:04 ` [PATCH -V3 08/11] ext4: Signed arithematic fix Mingming Cao
2008-08-28 21:03 ` [PATCH -V3 07/11] ext4: request for blocks with ar.excepted_group = -1 Mingming Cao
2008-08-28 21:03 ` [PATCH -V3 06/11] ext4: Update meta-data reservation with delalloc Mingming Cao
2008-08-28 20:57 ` [PATCH -V3 05/11] ext4: Switch to non delalloc mode when we are low on free blocks count Mingming Cao
2008-08-28 20:56 ` [PATCH -V3 04/11] ext4: Add percpu dirty block accounting Mingming Cao
2008-10-09 20:44 ` Eric Sandeen
2008-10-10 4:52 ` Aneesh Kumar K.V
2008-10-10 4:58 ` Eric Sandeen
2008-10-11 21:10 ` Andreas Dilger
2008-08-28 20:42 ` [PATCH -V3 03/11] ext4: Retry block reservation Mingming Cao
2008-08-28 20:41 ` [PATCH -V3 02/11] ext4: Make sure all the block allocation paths reserve blocks Mingming Cao
2008-08-27 19:05 ` [PATCH -V3 01/11] percpu_counters: make fbc->count read atomic on 32 bit architecture Andrew Morton
2008-08-27 21:01 ` Peter Zijlstra
2008-08-27 21:22 ` Andrew Morton
2008-08-28 3:52 ` Aneesh Kumar K.V
2008-08-28 4:09 ` Andrew Morton
2008-08-28 22:59 ` Mingming Cao
2008-08-28 7:57 ` Peter Zijlstra
2008-08-28 3:48 ` Aneesh Kumar K.V
2008-08-28 4:06 ` Andrew Morton
2008-08-28 14:19 ` Nick Piggin
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