On Sat, Apr 24, 2021 at 02:27:11PM -0500, Steve French wrote: > Using the buildbot test systems, this resulted in an average improvement > of 14% to the Windows server test target for the first 12 tests I > tried (no multichannel) > changing to 12MB rasize (read ahead size). Similarly increasing the > rasize to 12MB to Azure (this time with multichannel, 4 channels) > improved performance 37% > > Note that Ceph had already introduced a mount parameter "rasize" to > allow controlling this. Add mount parameter "rasize" to cifs.ko to > allow control of read ahead (rasize defaults to 4MB which is typically > what it used to default to to the many servers whose rsize was that). I think something was missing from this patch -- I see you parse it and set it in the mount context, but I don't see where it then gets used to actually affect readahead.
