From: Phillip Susi <psusi@cfl.rr.com>
To: Vivek Goyal <vgoyal@redhat.com>
Cc: Karel Zak <kzak@redhat.com>,
linux-kernel@vger.kernel.org, Jens Axboe <jaxboe@fusionio.com>
Subject: Re: [PATCH 1/2] Add partition resize function to BLKPG ioctl
Date: Thu, 08 Dec 2011 11:06:29 -0500 [thread overview]
Message-ID: <4EE0E085.8000907@cfl.rr.com> (raw)
In-Reply-To: <20111208155844.GA9281@redhat.com>
On 12/8/2011 10:58 AM, Vivek Goyal wrote:
> So, if there is an IO in flight while partition shrinking is happening,
> then IO can end up happening outside the partition?
Yes. Of course if there was an in flight IO at the time you truncate
the partition, then you did something wrong ( didn't shrink the fs first ).
> part->nr_sects can be 64 bits on 32bit machines and update will be
> non-atomic. I had used sequence counter to make sure read is able
> to get to intermediate value. May be it is a good idea to address
> this concenrn.
Isn't that what the mutex is for?
next prev parent reply other threads:[~2011-12-08 16:06 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1322709471.git.psusi@cfl.rr.com>
2011-12-01 3:23 ` [PATCH 1/2] Add partition resize function to BLKPG ioctl Phillip Susi
2011-12-08 12:30 ` Karel Zak
2011-12-08 14:22 ` Phillip Susi
2011-12-08 15:16 ` Karel Zak
2011-12-08 15:25 ` Phillip Susi
2011-12-08 15:58 ` Vivek Goyal
2011-12-08 16:06 ` Phillip Susi [this message]
2011-12-08 16:28 ` Vivek Goyal
2011-12-08 16:55 ` Phillip Susi
2011-12-09 2:53 ` Phillip Susi
2011-12-12 14:53 ` Vivek Goyal
2011-12-12 17:43 ` Phillip Susi
2011-12-12 17:49 ` Joe Perches
2011-12-12 18:04 ` Vivek Goyal
2011-12-13 0:15 ` Phillip Susi
2011-12-13 0:16 ` Phillip Susi
2011-12-13 0:16 ` [PATCH 2/2] Add BLKPG_GET_PARTITION operation Phillip Susi
2011-12-19 20:25 ` [PATCH 1/2] Add partition resize function to BLKPG ioctl Vivek Goyal
2011-12-21 1:53 ` Phillip Susi
2011-12-21 1:54 ` Phillip Susi
2011-12-21 1:54 ` [PATCH 2/2] Add BLKPG_GET_PARTITION operation Phillip Susi
2011-12-21 20:46 ` [PATCH 1/2] Add partition resize function to BLKPG ioctl Vivek Goyal
2011-12-24 21:36 ` Phillip Susi
2011-12-24 22:21 ` Phillip Susi
2011-12-24 22:21 ` [PATCH 2/2] Add BLKPG_GET_PARTITION operation Phillip Susi
2011-12-01 3:23 ` Phillip Susi
2011-12-08 12:35 ` Karel Zak
2011-12-08 14:25 ` Phillip Susi
2011-12-29 17:06 [PATCH 1/2] Add partition resize function to BLKPG ioctl Maxim Patlasov
2011-12-30 0:09 ` Phillip Susi
2012-01-01 21:49 ` Phillip Susi
2012-01-26 19:01 ` Vivek Goyal
2012-01-26 20:35 ` Phillip Susi
2012-01-26 21:04 ` Vivek Goyal
2012-01-26 21:48 ` Phillip Susi
2012-01-30 15:49 ` Vivek Goyal
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