[lkml]   [2004]   [Aug]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [Lse-tech] [PATCH] new bitmap list format (for cpusets)
Dinakar wrote:
> Considering that cpu_possible_map does not get fully initialized
> until smp_prepare_cpus gets called by init(), I thought it right
> to move cpuset_init() to after smp initialization.

Thank-you. I suspect you're right.

Could you also provide some motivation for the other changes in your
patch, moving struct cpuset, enum cpuset_flagbits_t, and struct cpuset
top_cpuset definitions from kernel/cpuset.c to include/linux/cpuset.h?
I had found it rather pleasing that these structures did not need to
be known outside of kernel/cpuset.c.

Another approach that might work, in order to ensure that the top_cpuset
has its cpus_allowed set to the proper value of cpu_possible_map, would
be to add a routine, say cpuset_init_smp(), called from init/main.c
init() just after smp_init() returns, to update the cpus_allowed in
top_cpuset from the fully initialized value of cpu_possible_map. This
seems to resemble the call sched_init_smp(), also made in init/main.c
init() just after smp_init() returns, to finish initializing some sched

If you take your approach, should we remove the __init qualifier from
kernel/cpuset.c cpuset_init()?

I won't rest till it's the best ...
Programmer, Linux Scalability
Paul Jackson <> 1.650.933.1373
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 14:05    [W:0.159 / U:3.660 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site