On 18/04/19 12:47, Kevin Wolf wrote: >> This is acually only an issue with kernels prior to 4.5, so it should be >> fixed downstream instead. > > I don't think that upstream QEMU has kernels > 4.5 as an official > requirement, though? We try to be compatible with quite old libs, so we > should stay compatible with old kernels, too.
It is a pretty rare case, where the host must support very large scatter/gather lists (>=1024 elements) and there is a workaround by setting max_sectors_kb to 4096 in the host. It also makes performance worse. Having already written and posted the patch, I can of course apply it too, but I'm not sure it's a good idea. 4.4 is already a pretty old kernel and whoever is using it likely will not get the fix for free by using a very new QEMU. Paolo
