[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] Safely reopening image files by stashing fds
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] Safely reopening image files by stashing fds |
Date: |
Fri, 5 Aug 2011 16:24:31 +0100 |
On Fri, Aug 5, 2011 at 3:28 PM, Christoph Hellwig <address@hidden> wrote:
> On Fri, Aug 05, 2011 at 02:12:48PM +0100, Daniel P. Berrange wrote:
>> > Because you cannot change O_DIRECT on an open fd :(. This is why
>> > we're going through this pain.
>>
>> Hmm, I remember hearing that before, but looking at the current fcntl()
>> manpage, it claims you *can* change O_DIRECT using SET_FL. Perhaps this
>> is a newish feature, but it'd be nicer to use it if possible ?
>
> It's been there since day 1 of O_DIRECT support.
Sorry, my bad. So for Linux we could just use fcntl for
block_set_hostcache and not bother with reopening. However, we will
need to reopen should we wish to support changing O_DSYNC.
Stefan
- [Qemu-devel] Safely reopening image files by stashing fds, Stefan Hajnoczi, 2011/08/05
- Re: [Qemu-devel] Safely reopening image files by stashing fds, Paolo Bonzini, 2011/08/05
- Re: [Qemu-devel] Safely reopening image files by stashing fds, Stefan Hajnoczi, 2011/08/05
- Re: [Qemu-devel] Safely reopening image files by stashing fds, Daniel P. Berrange, 2011/08/05
- Re: [Qemu-devel] Safely reopening image files by stashing fds, Christoph Hellwig, 2011/08/05
- Re: [Qemu-devel] Safely reopening image files by stashing fds,
Stefan Hajnoczi <=
- Re: [Qemu-devel] Safely reopening image files by stashing fds, Kevin Wolf, 2011/08/05
- Re: [Qemu-devel] Safely reopening image files by stashing fds, Anthony Liguori, 2011/08/05
- Re: [Qemu-devel] Safely reopening image files by stashing fds, Supriya Kannery, 2011/08/08
- Re: [Qemu-devel] Safely reopening image files by stashing fds, Kevin Wolf, 2011/08/08
- Re: [Qemu-devel] Safely reopening image files by stashing fds, supriya kannery, 2011/08/09
- Re: [Qemu-devel] Safely reopening image files by stashing fds, Kevin Wolf, 2011/08/09
- Re: [Qemu-devel] Safely reopening image files by stashing fds, supriya kannery, 2011/08/09
- Re: [Qemu-devel] [RFC] Safely reopening image files by stashing fds, Supriya Kannery, 2011/08/16
- Re: [Qemu-devel] [RFC] Safely reopening image files by stashing fds, Supriya Kannery, 2011/08/16
- Re: [Qemu-devel] [RFC] Safely reopening image files by stashing fds, Kevin Wolf, 2011/08/17