On Wed, Jan 6, 2021 at 12:49 AM Yury Norov <yury.no...@gmail.com> wrote: > > On Tue, Jan 5, 2021 at 4:48 PM Paul E. McKenney <paul...@kernel.org> wrote: > > > > Hello! > > > > This series allows "all", "none", and "last" to be used in cpumask > > strings. This allows these strings to be less dependent on the underlying > > system. For example, currently a string specifying all but the first > > CPU must be "1-7" on an eight-CPU system and "1-15" on a 16-CPU system. > > With this series, the single string "1-last" can be used regardless of the > > number of CPUs (at least assuming that each system has at least one CPU). > > 'none' may be implemented as an empty string or string with separators only, > but I have nothing against explicit 'none'. See other comments inline. > > Thanks, > Yury. > > > 1. Un-inline cpulist_parse for SMP; prepare for ascii helpers, > > courtesy of Paul Gortmaker. > > > > 2. Make "all" alias global and not just RCU, courtesy of Paul > > Gortmaker. > > > > 3. Add a "none" alias to complement "all", courtesy of Paul > > Gortmaker. > > > > 4. Add "last" alias for cpu list specifications, courtesy of Paul > > Gortmaker. > > > > 5. Use "all" and "last" in "nohz_full" and "rcu_nocbs". > > > > Thanx, Paul
Hi Paul, Today I found this series in linux-next despite downsides discovered during the review. This series introduces absolutely unneeded cap on the number of cpus in the system (9999), and also adds unsafe and non-optimal code. In addition to that, I observe this warning on powerpc: CC lib/cpumask.o lib/cpumask.c: In function ‘cpulist_parse’: lib/cpumask.c:222:17: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] 222 | memblock_free((phys_addr_t)cpulist, len); | ^ Can you please revert this series unless all the problems will be fixed? Thanks, Yury