From: "M. Warner Losh" <imp@bsdimp.com>
To: qemu-devel@nongnu.org, jamie@shareable.org
Cc: uril@redhat.com
Subject: Re: [Qemu-devel] migration: adding migration to/from a file (v2)
Date: Thu, 19 Feb 2009 16:36:01 -0700 (MST) [thread overview]
Message-ID: <20090219.163601.29203982.imp@bsdimp.com> (raw)
In-Reply-To: <20090219202849.GE22319@shareable.org>
In message: <20090219202849.GE22319@shareable.org>
Jamie Lokier <jamie@shareable.org> writes:
: Anthony Liguori wrote:
: > >Sure looks like a bug.
: > I wish! It's Unix suckiness.
:
: Windows is the same.
: It's a more of a conceptual problem than it looks, not merely an API bug.
:
: It comes down to "what would 'readable' and 'writable' mean on a file?".
"Would a read or write operation block?" is a better way to look at
the interface that select() or poll() provides. For a regular file,
the answer is "no" since the writes are so fast and often
asynchronous...
Warner
next prev parent reply other threads:[~2009-02-19 23:36 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-19 11:45 [Qemu-devel] migration: adding migration to/from a file (v2) Uri Lublin
2009-02-19 13:57 ` Anthony Liguori
2009-02-19 16:14 ` Uri Lublin
2009-02-19 16:51 ` Anthony Liguori
2009-02-19 19:06 ` Uri Lublin
2009-02-19 20:05 ` Anthony Liguori
2009-02-19 20:28 ` Jamie Lokier
2009-02-19 23:36 ` M. Warner Losh [this message]
2009-02-19 23:59 ` Anthony Liguori
2009-02-20 0:36 ` M. Warner Losh
2009-02-19 20:45 ` Uri Lublin
2009-02-19 19:37 ` Jamie Lokier
2009-02-19 20:06 ` Anthony Liguori
2009-02-19 19:33 ` Jamie Lokier
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