[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v3] xen_disk: split discard input to match internal representation
On Wed, Nov 23, 2016 at 10:39:12AM +0000, Olaf Hering wrote: > The guest sends discard requests as u64 sector/count pairs, but the > block layer operates internally with s64/s32 pairs. The conversion > leads to IO errors in the guest, the discard request is not processed. > > domU.cfg: > 'vdev=xvda, format=qcow2, backendtype=qdisk, target=/x.qcow2' > domU: > mkfs.ext4 -F /dev/xvda > Discarding device blocks: failed - Input/output error > > Fix this by splitting the request into chunks of BDRV_REQUEST_MAX_SECTORS. > Add input range checking to avoid overflow. > > Fixes f313520 ("xen_disk: add discard support") > > Signed-off-by: Olaf Hering <olaf@xxxxxxxxx> Acked-by: Anthony PERARD <anthony.perard@xxxxxxxxxx> -- Anthony PERARD _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx https://lists.xen.org/xen-devel
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