Messages in this thread | | | Date | Mon, 08 Aug 2011 09:35:10 +0800 | From | Liu Yuan <> | Subject | Re: [RFC PATCH]vhost-blk: In-kernel accelerator for virtio block device |
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On 08/06/2011 02:02 AM, Badari Pulavarty wrote: > On 8/5/2011 4:04 AM, Liu Yuan wrote: >> On 08/05/2011 05:58 AM, Badari Pulavarty wrote: >>> Hi Liu Yuan, >>> >>> I started testing your patches. I applied your kernel patch to 3.0 >>> and applied QEMU to latest git. >>> >>> I passed 6 blockdevices from the host to guest (4 vcpu, 4GB RAM). >>> I ran simple "dd" read tests from the guest on all block devices >>> (with various blocksizes, iflag=direct). >>> >>> Unfortunately, system doesn't stay up. I immediately get into >>> panic on the host. I didn't get time to debug the problem. Wondering >>> if you have seen this issue before and/or you have new patchset >>> to try ? >>> >>> Let me know. >>> >>> Thanks, >>> Badari >>> >> >> Okay, it is actually a bug pointed out by MST on the other thread, >> that it needs a mutex for completion thread. >> >> Now would you please this attachment?This patch only applies to >> kernel part, on top of v1 kernel patch. >> >> This patch mainly moves completion thread into vhost thread as a >> function. As a result, both requests submitting and completion >> signalling is in the same thread. >> >> Yuan > > Unfortunately, "dd" tests (4 out of 6) in the guest hung. I see > following messages > > virtio_blk virtio2: requests: id 0 is not a head ! > virtio_blk virtio3: requests: id 1 is not a head ! > virtio_blk virtio5: requests: id 1 is not a head ! > virtio_blk virtio1: requests: id 1 is not a head ! > > I still see host panics. I will collect the host panic and see if its > still same or not. > > Thanks, > Badari > > Would you please show me how to reproduce it step by step? I tried dd with two block device attached, but didn't get hung nor panic.
Yuan
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