lkml.org 
[lkml]   [2002]   [Jun]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] 2.5.21 Nonlinear CPU support
Anton Altaparmakov wrote:
>
> allocate_compression_buffers() currently allocates all buffers up
> smp_num_cpus which is fine without hotswap cpus. Once hotswap cpus path
> goes in, then the allocation will be (pseudo code):
>
> for (i = 0; i < NR_CPUS; i++) {
> if (cpu_possible(i)) {
> ntfs_compression_buffer[i] = vmalloc();
> // TODO handle errors
> }
> }
>
> That means in words that we allocate buffers only once and for all
> existing cpu SOCKETS, i.e. including all potentially hotpluggable cpus
> which are currently offline. - If someone invents hotpluggable cpu sockets
> at some point then they should be burnt at the stake! (-;
>

Note that with my code, you don't allocate any memory until you have
actually seen a particular CPU being *used.* All very simple...

-hpa


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:26    [W:0.089 / U:0.204 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site