Re: [-mm patch] i386: enable 4k stacks by default

[Jan Engelhardt <jengelh@linux01.gwdg.de>]

On Apr 30 2007 10:38, William Lee Irwin III wrote:
>> static char softirq_stack[NR_CPUS * THREAD_SIZE]
>>                 __attribute__((__aligned__(THREAD_SIZE)));
>> 
>> static char hardirq_stack[NR_CPUS * THREAD_SIZE]
>>                 __attribute__((__aligned__(THREAD_SIZE)));
>> 
>> With 8K stacks and NR_CPUS==128 that would be 2MB statically reserved. Yuck.
>> Really needs to be dynamically allocated. I'll take a look once the .22 
>> big merge is done.
>
>Here's what I did for i386 for someone concerned about blowing the stack.

If we really need it, then maybe a variable like CONFIG_LOG_BUF_SHIFT
could be hacked up, resulting in CONFIG_THREAD_SIZE_SHIFT, defaulting to 3
(=8KB).


Jan
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