From: Christoph Hellwig <hch@lst.de>
To: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Kevin Wolf <kwolf@redhat.com>,
Anthony Liguori <aliguori@us.ibm.com>,
Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>,
Stefan Hajnoczi <stefanha@gmail.com>,
qemu-devel@nongnu.org, Khoa Huynh <khoa@us.ibm.com>,
Christoph Hellwig <hch@lst.de>
Subject: Re: [Qemu-devel] [PATCH] raw-posix: Linearize direct I/O on Linux NFS
Date: Fri, 15 Apr 2011 19:29:09 +0200 [thread overview]
Message-ID: <20110415172909.GB303@lst.de> (raw)
In-Reply-To: <1302884634.32391.3.camel@badari-desktop>
On Fri, Apr 15, 2011 at 09:23:54AM -0700, Badari Pulavarty wrote:
> True. That brings up a different question - whether we are doing
> enough testing on mainline QEMU :(
It seems you're clearly not doing enough testing on any qemu. Even
the RHEL6 qemu has had preadv/pwritev since the first beta.
> I asked Stefan to work on a QEMU patch - since my QEMU skills are
> limited and Stefan is more appropriate person to deal with QEMU :)
>
> As mentioned earlier, we don't see performance with any temporary
> solutions suggested so far (RPC table slot + ASYNC) comes anywhere
> close to readv/writev support patch or linearized QEMU.
So push harder for the real patch. I haven't seen a clear NAK from
Trond, just that he'd like to avoid it. For extra brownie points get
him release his read/write rework and integrate it with that.
next prev parent reply other threads:[~2011-04-15 17:29 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-15 13:40 [Qemu-devel] [PATCH] raw-posix: Linearize direct I/O on Linux NFS Stefan Hajnoczi
2011-04-15 15:05 ` Christoph Hellwig
2011-04-15 15:26 ` Stefan Hajnoczi
2011-04-15 15:34 ` Christoph Hellwig
2011-04-15 16:10 ` Anthony Liguori
2011-04-15 16:17 ` Stefan Hajnoczi
2011-04-15 17:27 ` Christoph Hellwig
2011-04-15 16:23 ` Badari Pulavarty
2011-04-15 17:29 ` Christoph Hellwig [this message]
2011-04-15 22:21 ` Badari Pulavarty
2011-04-15 23:00 ` Anthony Liguori
2011-04-15 23:33 ` Badari Pulavarty
2011-04-16 2:05 ` Christoph Hellwig
2011-04-16 8:46 ` Stefan Hajnoczi
2011-04-16 2:03 ` Christoph Hellwig
2011-04-15 18:09 ` Anthony Liguori
2011-04-15 18:25 ` Badari Pulavarty
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