From: Tomasz Chmielewski <mangoo@wpkg.org>
To: Jim Meyering <jim@meyering.net>
Cc: "Andi Kleen" <andi@firstfloor.org>,
"Pádraig Brady" <P@draigBrady.com>,
linux-btrfs@vger.kernel.org, bug-coreutils@gnu.org,
"Giuseppe Scrivano" <gscrivano@gnu.org>,
"Chris Mason" <chris.mason@oracle.com>
Subject: Re: BTRFS file clone support for cp
Date: Thu, 30 Jul 2009 12:21:28 +0200 [thread overview]
Message-ID: <4A717428.9040906@wpkg.org> (raw)
In-Reply-To: <87iqhatqzz.fsf@meyering.net>
Jim Meyering wrote:
> With classic cp, if I copy a 1GB non-sparse file and there's less
> space than that available, cp fails with ENOSPC.
> With this new feature, it succeeds even if there are
> just a few blocks available.
Is it good or bad?
> Also, consider (buggy!) code that then depends on being able to modify
> that file in-place, and that "knows" it doesn't need to check for ENOSPC.
> Sure, they should always check for write failure, but still. It is
> a change.
On a multiuser system, that (buggy) tool would fail anyway if something
else adds enough new data to the filesystem in the meantime.
But sure, it's a change.
--
Tomasz Chmielewski
http://wpkg.org
next prev parent reply other threads:[~2009-07-30 10:21 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <87d47o3fip.fsf@master.homenet>
[not found] ` <4A6CEA48.5050208@draigBrady.com>
[not found] ` <8763defuvq.fsf@meyering.net>
[not found] ` <87ws5tvrq8.fsf@master.homenet>
2009-07-27 23:40 ` BTRFS file clone support for cp Pádraig Brady
2009-07-28 20:06 ` Giuseppe Scrivano
2009-07-29 13:01 ` Chris Mason
2009-07-29 14:14 ` Pádraig Brady
2009-07-29 16:10 ` Chris Mason
2009-07-29 16:18 ` Chris Mason
2009-07-29 18:14 ` Pádraig Brady
2009-07-30 0:57 ` Joel Becker
2009-07-30 7:39 ` Jim Meyering
2009-07-30 8:21 ` Joel Becker
2009-07-30 8:40 ` Pádraig Brady
2009-07-30 16:28 ` Ric Wheeler
2009-07-30 16:48 ` Jim Meyering
2009-07-30 9:26 ` Andi Kleen
2009-07-30 10:02 ` Pádraig Brady
2009-07-30 10:16 ` Jim Meyering
2009-07-30 10:21 ` Tomasz Chmielewski [this message]
2009-07-30 10:54 ` Andi Kleen
2009-07-30 18:05 ` Joel Becker
2009-07-30 23:28 ` Pádraig Brady
[not found] ` <87k51r9sxh.fsf@master.homenet>
[not found] ` <4A70C4E0.9030104@draigBrady.com>
2009-07-30 17:28 ` Giuseppe Scrivano
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