Re: [PATCH] scsi: virtio-scsi: Fix address translation failure ofHighMem pages used by sg list

[Rolf Eike Beer]

Am 25.07.2012 10:29, schrieb Wang Sen:
> When using the commands below to write some data to a virtio-scsi LUN 
> of the
> QEMU guest(32-bit) with 1G physical memory(qemu -m 1024), the qemu
> will crash.
>
> 	# sudo mkfs.ext4 /dev/sdb  (/dev/sdb is the virtio-scsi LUN.)
> 	# sudo mount /dev/sdb /mnt
> 	# dd if=/dev/zero of=/mnt/file bs=1M count=1024
>
> In current implementation, sg_set_buf is called to add buffers to sg
> list which
> is put into the virtqueue eventually.

The next sentence is somehow broken:

> But there are some HighMem pages in
> table->sgl can not get virtual address by sg_virt.

Maybe something like "But _if_ there are ... _you_ can not get ..."?

Eike
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