From: Anthony Liguori <anthony@codemonkey.ws>
To: Alexander Graf <agraf@suse.de>
Cc: Nolan <nolan@sigbus.net>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [PATCH] Allow adjustment of http block device's readahead size.
Date: Tue, 30 Jun 2009 08:36:20 -0500 [thread overview]
Message-ID: <4A4A14D4.8010204@codemonkey.ws> (raw)
In-Reply-To: <1EC214E3-2B9D-4202-ADC4-05DDF691E927@suse.de>
Alexander Graf wrote:
>
> On 29.06.2009, at 15:45, Anthony Liguori wrote:
>
>> Nolan wrote:
>>> Allow adjustment of http block device's readahead size, via the
>>> environment variable "HTTP_READAHEAD_SIZE".
>>>
>>> Signed-off-by: Nolan Leake <nolan <at> sigbus.net>
>>>
>>
>> I'd rather a command line option than an environmental variable.
>
> Wouldn't it make sense to pass arbitrary options via -drive to backends?
>
> That way we could have -drive
> file=http://sample.com/test.iso,http-readahead=1024.
Where it gets complex is that you probably want those options to be
included as qcow2 backing_file too. I've thought about this in the past
and haven't been able to come to a great solution.
Regards,
Anthony Liguori
> Alex
>
next prev parent reply other threads:[~2009-06-30 13:36 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-27 2:11 [Qemu-devel] [PATCH] Allow adjustment of http block device's readahead size Nolan
2009-06-29 13:45 ` Anthony Liguori
2009-06-30 13:09 ` Alexander Graf
2009-06-30 13:36 ` Anthony Liguori [this message]
2009-06-30 16:44 ` Jamie Lokier
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