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From: | Paolo Bonzini |
Subject: | Re: [Qemu-devel] [PATCH 1/2 v1] blkdrv: Add queue limits parameters for sg block drive |
Date: | Wed, 22 Aug 2012 16:13:44 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:14.0) Gecko/20120717 Thunderbird/14.0 |
Il 22/08/2012 15:13, Stefan Hajnoczi ha scritto: > http://lists.gnu.org/archive/html/qemu-devel/2010-12/msg01741.html > > "This is a real problem in practice. IE. the USB CD-ROM on this POWER7 > blade limits transfers to 0x1e000 bytes for example and the Linux "sr" > driver on the guest is going to try to give me bigger requests than that > if I don't start limiting them, which will cause all sort of errors." > > It cannot be fixed for emulated SCSI HBAs in general but it can for > virtio-scsi. For disks, this should be fixed simply by using scsi-block instead of scsi-generic. CD-ROMs are indeed more complicated because burning CDs cannot be done with syscalls. :/ Paolo
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