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So the schemata file contains this line: > > MB:0=4294967295;1=4294967295 > > If a user edits the schemata file with vi(1) (or other editor) and > simply writes that line back, it gets changed to: > > MB:0= 4;1= 4 > > which sets maximum bandwidth to a very low value. > > This happens because bw_validate() unconditionally rounds user supplied > values up to next multiple of r->membw.bw_gran. That results in a value > that will not fit into d->mbps_val[closid]. > > Rounding up only makes sense when mba_MBps is not enabled and control > values are expressed as percentage values. > > Skip the roundup() when mba_MBps is enabled. > > Signed-off-by: Tony Luck > --- A fix for this issue is already being discussed. Please see latest fix at [1] that additionally addresses the issue if a user attempts to write a value larger than 4294967295. Could you please check if that fix works for you? Thank you. Reinette [1] https://lore.kernel.org/all/a7c80676-0761-4618-ac07-0b53434b1a9b@intel.com/