Re: [Qemu-block] [PATCH 0/1] RFC: don't obey the block device max transfer len / max segments for block devices

On 7/3/19 4:52 AM, Stefan Hajnoczi wrote: > On Sun, Jun 30, 2019 at 06:08:54PM +0300, Maxim Levitsky wrote: >> It looks like Linux block devices, even in O_DIRECT mode don't have any user >> visible >> limit on transfer size / number of segments, which underlying block device >> can have. >> The

Re: [Qemu-block] [PATCH 0/1] RFC: don't obey the block device max transfer len / max segments for block devices

On Sun, Jun 30, 2019 at 06:08:54PM +0300, Maxim Levitsky wrote: > It looks like Linux block devices, even in O_DIRECT mode don't have any user > visible > limit on transfer size / number of segments, which underlying block device > can have. > The block layer takes care of enforcing these limits

[Qemu-block] [PATCH 0/1] RFC: don't obey the block device max transfer len / max segments for block devices

It looks like Linux block devices, even in O_DIRECT mode don't have any user visible limit on transfer size / number of segments, which underlying block device can have. The block layer takes care of enforcing these limits by splitting the bios. By limiting the transfer sizes, we force qemu to