From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: "Darrick J. Wong" <darrick.wong@oracle.com>,
axboe@kernel.dk, torvalds@linux-foundation.org,
bfields@fieldses.org, tytso@mit.edu, martin.petersen@oracle.com,
linux-api@vger.kernel.org, david@fromorbit.com,
linux-kernel@vger.kernel.org, shane.seymour@hpe.com,
linux-fsdevel@vger.kernel.org, jlayton@poochiereds.net,
akpm@linux-foundation.org
Subject: Re: [PATCH 3/3] block: implement (some of) fallocate for block devices
Date: Mon, 21 Mar 2016 14:21:39 -0400 [thread overview]
Message-ID: <yq1mvpr7kuk.fsf@sermon.lab.mkp.net> (raw)
In-Reply-To: <20160321181726.GA10892@infradead.org> (Christoph Hellwig's message of "Mon, 21 Mar 2016 11:17:26 -0700")
>>>>> "Christoph" == Christoph Hellwig <hch@infradead.org> writes:
Christoph> On Mon, Mar 21, 2016 at 10:52:35AM -0700, Darrick J. Wong wrote:
>> > I don't really understand the comment. But I think you'd be much
>>
>> I don't know of a block device primitive that corresponds to the
>> "default" mode of fallocate, as documented in the manpage (i.e. mode
>> == 0). I agree that the whole thing could be simplified in the
>> manner you point out below.
Christoph> SCSI allows 'anchoring' blocks, which is pretty similar to a
Christoph> normal fallocate, but we don't support anchoring blocks in
Christoph> Linux yet.
Chicken and egg problem. I actually did tinker with this for a different
project a while back and can easily revive it.
--
Martin K. Petersen Oracle Linux Engineering
next prev parent reply other threads:[~2016-03-21 18:22 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-15 19:42 [PATCH v7 0/3] fallocate for block devices to provide zero-out Darrick J. Wong
2016-03-15 19:42 ` [PATCH 1/3] block: invalidate the page cache when issuing BLKZEROOUT Darrick J. Wong
2016-03-15 19:42 ` [PATCH 2/3] block: require write_same and discard requests align to logical block size Darrick J. Wong
2016-03-15 19:42 ` [PATCH 3/3] block: implement (some of) fallocate for block devices Darrick J. Wong
2016-03-21 15:38 ` Christoph Hellwig
2016-03-21 17:52 ` Darrick J. Wong
2016-03-21 18:17 ` Christoph Hellwig
2016-03-21 18:21 ` Martin K. Petersen [this message]
2016-03-21 18:52 ` Mike Snitzer
2016-03-21 19:11 ` Darrick J. Wong
2016-03-21 19:22 ` Mike Snitzer
2016-03-21 20:59 ` Brian Foster
-- strict thread matches above, loose matches on Subject: below --
2016-03-05 0:55 [PATCH v6 0/3] fallocate for block devices to provide zero-out Darrick J. Wong
2016-03-05 0:56 ` [PATCH 3/3] block: implement (some of) fallocate for block devices Darrick J. Wong
2016-03-05 3:06 ` Linus Torvalds
2016-03-05 20:57 ` Christoph Hellwig
2016-03-05 3:13 ` Linus Torvalds
2016-03-05 20:58 ` Christoph Hellwig
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