Am 18.04.2019 um 13:01 hat Paolo Bonzini geschrieben: > 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.
Fair enough. I didn't consider that it has a performance impact even on newer kernels that don't need the patch. Kevin
