From: Ted Ts'o <tytso@mit.edu>
To: "Pádraig Brady" <P@draigbrady.com>
Cc: Dave Chinner <david@fromorbit.com>,
Christoph Hellwig <hch@infradead.org>,
linux-fsdevel@vger.kernel.org
Subject: Re: fallocate vs ENOSPC
Date: Wed, 30 Nov 2011 10:32:02 -0500 [thread overview]
Message-ID: <20111130153202.GA9251@thunk.org> (raw)
In-Reply-To: <4ED5F740.8090005@draigBrady.com>
On Wed, Nov 30, 2011 at 09:28:32AM +0000, Pádraig Brady wrote:
>
> But then posix_fallocate() would always be slow I think,
> requiring one to actually write the NULs.
Almost no one should ever use posix_fallocate(); it's can be a
performance disaster because you don't know whether or not the file
system will really do fallocate, or will do the slow "write zeros"
thing.
You really should use fallocate(), take the failure if the file system
doesn't support fallocate, and then you can decide what the
appropriate thing to do might be.
- Ted
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next prev parent reply other threads:[~2011-11-30 15:32 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-25 10:26 fallocate vs ENOSPC Pádraig Brady
2011-11-25 10:40 ` Christoph Hellwig
2011-11-27 3:14 ` Ted Ts'o
2011-11-27 23:43 ` Dave Chinner
2011-11-28 0:13 ` Pádraig Brady
2011-11-28 3:51 ` Dave Chinner
2011-11-28 0:40 ` Theodore Tso
2011-11-28 5:10 ` Dave Chinner
2011-11-28 8:55 ` Pádraig Brady
2011-11-28 10:41 ` tao.peng
2011-11-28 12:02 ` Pádraig Brady
2011-11-28 14:36 ` Theodore Tso
2011-11-28 14:51 ` Pádraig Brady
2011-11-28 20:29 ` Ted Ts'o
2011-11-28 20:49 ` Jeremy Allison
2011-11-29 22:39 ` Eric Sandeen
2011-11-29 23:04 ` Jeremy Allison
2011-11-29 23:19 ` Eric Sandeen
2011-11-28 18:49 ` Jeremy Allison
2011-11-29 0:26 ` Dave Chinner
2011-11-29 0:45 ` Jeremy Allison
2011-11-29 0:24 ` Dave Chinner
2011-11-29 14:11 ` Pádraig Brady
2011-11-29 23:37 ` Dave Chinner
2011-11-30 9:28 ` Pádraig Brady
2011-11-30 15:32 ` Ted Ts'o [this message]
2011-11-30 16:11 ` Pádraig Brady
2011-11-30 17:01 ` Ted Ts'o
2011-11-30 23:39 ` Dave Chinner
2011-12-01 0:11 ` Pádraig Brady
2011-12-07 11:42 ` Pádraig Brady
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