From: Christoph Hellwig <hch@infradead.org>
To: Nick Piggin <npiggin@suse.de>
Cc: Dave Chinner <david@fromorbit.com>,
Josef Bacik <josef@redhat.com>,
linux-fsdevel@vger.kernel.org, chris.mason@oracle.com,
hch@infradead.org, akpm@linux-foundation.org,
linux-kernel@vger.kernel.org
Subject: Re: [RFC] new ->perform_write fop
Date: Fri, 21 May 2010 11:15:18 -0400 [thread overview]
Message-ID: <20100521151518.GA12752@infradead.org> (raw)
In-Reply-To: <20100514072219.GC4706@laptop>
Nick, what exactly is the problem with the reserve + allocate design?
In a delalloc filesystem (which is all those that will care about high
performance large writes) the write path fundamentally consists of those
two operations. Getting rid of the get_blocks mess and replacing it
with a dedicated operations vector will simplify things a lot.
Punching holes is a rather problematic operation, and as mentioned not
actually implemented for most filesystems - just decrementing counters
on errors increases the chances that our error handling will actually
work massively.
next prev parent reply other threads:[~2010-05-21 15:15 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-12 21:24 [RFC] new ->perform_write fop Josef Bacik
2010-05-13 1:39 ` Josef Bacik
2010-05-13 15:36 ` Christoph Hellwig
2010-05-14 1:00 ` Dave Chinner
2010-05-14 3:30 ` Josef Bacik
2010-05-14 5:50 ` Nick Piggin
2010-05-14 7:20 ` Dave Chinner
2010-05-14 7:33 ` Nick Piggin
2010-05-14 6:41 ` Dave Chinner
2010-05-14 7:22 ` Nick Piggin
2010-05-14 8:38 ` Dave Chinner
2010-05-14 13:33 ` Chris Mason
2010-05-18 6:36 ` Nick Piggin
2010-05-18 8:05 ` Dave Chinner
2010-05-18 10:43 ` Nick Piggin
2010-05-18 12:27 ` Dave Chinner
2010-05-18 15:09 ` Nick Piggin
2010-05-19 23:50 ` Dave Chinner
2010-05-20 6:48 ` Nick Piggin
2010-05-20 20:12 ` Jan Kara
2010-05-20 23:05 ` Dave Chinner
2010-05-21 9:05 ` Steven Whitehouse
2010-05-21 13:50 ` Josef Bacik
2010-05-21 14:23 ` Nick Piggin
2010-05-21 15:19 ` Josef Bacik
2010-05-24 3:29 ` Nick Piggin
2010-05-22 0:31 ` Dave Chinner
2010-05-21 18:58 ` Jan Kara
2010-05-22 0:27 ` Dave Chinner
2010-05-24 9:20 ` Jan Kara
2010-05-24 9:33 ` Nick Piggin
2010-06-05 15:05 ` tytso
2010-06-06 7:59 ` Nick Piggin
2010-05-21 15:15 ` Christoph Hellwig [this message]
2010-05-22 2:31 ` Nick Piggin
2010-05-22 8:37 ` Dave Chinner
2010-05-24 3:09 ` Nick Piggin
2010-05-24 5:53 ` Dave Chinner
2010-05-24 6:55 ` Nick Piggin
2010-05-24 10:21 ` Dave Chinner
2010-06-01 6:27 ` Nick Piggin
2010-05-24 18:40 ` Joel Becker
2010-05-17 23:35 ` Jan Kara
2010-05-18 1:21 ` Dave Chinner
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