On 02/06/2015 03:45 AM, Peter Lieven wrote: >>> The idea was that IOV_MAX is the limit in case of at least virtio-blk. The >>> host >>> will not support more than IOV_MAX iovecs passed to a block request. >> Is there an issue in practice? > > If there is no platform where IOV_MAX is less than 1024 then not.
POSIX allows for a system with IOV_MAX as small as 16. But these days, systems we care about probably have a much larger value; alas, I don't know off-hand what actual systems use to say if 1024 is a common minimum. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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