On Tue 2020-08-11 09:31:45, Paul Menzel wrote: > Currently, LOG_BUF_SHIFT defaults to 17, which is 2 ^ 17 bytes = 128 KB, > and LOG_CPU_MAX_BUF_SHIFT defaults to 12, which is 2 ^ 12 bytes = 4 KB. > > Half of 128 KB is 64 KB, so more than 16 CPUs are required for the value > to be used, as then the sum of contributions is greater than 64 KB for > the first time. My guess is, that the description was written with the > configuration values used in the SUSE in mind. > > Cc: Luis R. Rodriguez <[email protected]> > Cc: [email protected] > Fixes: 23b2899f7f ("printk: allow increasing the ring buffer depending on the > number of CPUs") > Signed-off-by: Paul Menzel <[email protected]>
Great catch. Reviewed-by: Petr Mladek <[email protected]> Best Regards, Petr
