From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
To: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [PATCH] honor IDE_DMA_BUF_SECTORS
Date: Wed, 25 Mar 2009 16:19:58 +0000 [thread overview]
Message-ID: <49CA59AE.8060605@eu.citrix.com> (raw)
In-Reply-To: <49CA4C3D.1070705@redhat.com>
Avi Kivity wrote:
> Stefano Stabellini wrote:
>> Hi all,
>> after the recent introduction of dma_buf_prepare we stopped honoring
>> IDE_DMA_BUF_SECTORS (the guest can issue dma requests with a greater
>> total length than IDE_DMA_BUF_SECTORS).
>> This patch adds the IDE_DMA_BUF_SECTORS limit back in place.
>>
>> Comments are welcome.
>>
>
> Aren't 64K sector requests legal?
>
> Looking at ide_cmd_lba48_transform().
>
I am not sure about that, but I would think not since we define MAX_MULT_SECTORS 16
If I change MAX_MULT_SECTORS, am I supposed to see smaller dma requests?
next prev parent reply other threads:[~2009-03-25 16:26 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-25 13:45 [Qemu-devel] [PATCH] honor IDE_DMA_BUF_SECTORS Stefano Stabellini
2009-03-25 15:22 ` Avi Kivity
2009-03-25 16:19 ` Stefano Stabellini [this message]
2009-03-25 16:45 ` Avi Kivity
2009-03-25 16:50 ` Stefano Stabellini
2009-03-25 17:47 ` Stefano Stabellini
2009-03-26 10:23 ` Avi Kivity
2009-03-26 10:31 ` Stefano Stabellini
2009-03-26 10:57 ` Avi Kivity
2009-03-26 11:45 ` Stefano Stabellini
2009-03-26 12:10 ` Avi Kivity
2009-03-26 12:28 ` Stefano Stabellini
2009-03-26 12:47 ` Samuel Thibault
2009-03-26 12:58 ` Avi Kivity
2009-03-26 15:30 ` Samuel Thibault
2009-03-26 18:32 ` Avi Kivity
2009-03-26 18:48 ` Samuel Thibault
2009-03-26 19:40 ` Avi Kivity
2009-03-26 23:18 ` Samuel Thibault
2009-03-27 9:52 ` Avi Kivity
2009-03-27 10:32 ` Samuel Thibault
2009-03-27 10:53 ` Avi Kivity
2009-03-27 13:45 ` Samuel Thibault
2009-03-26 22:42 ` Christoph Hellwig
2009-03-26 23:22 ` Samuel Thibault
2009-03-27 10:02 ` Avi Kivity
2009-03-27 10:36 ` Samuel Thibault
2009-03-27 10:58 ` Avi Kivity
2009-03-25 16:46 ` Samuel Thibault
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