lkml.org 
[lkml]   [2007]   [Feb]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 2 of 4] Introduce i386 fibril scheduling
On Tue, 30 Jan 2007, Zach Brown wrote:

> + /*
> + * XXX The idea is to copy all but the actual call stack. Obviously
> + * this is wildly arch-specific and belongs abstracted out.
> + */
> + *next->ti = *ti;
> + *thread_info_pt_regs(next->ti) = *thread_info_pt_regs(ti);

arch copy_thread_info()?



> + current->per_call = next->per_call;

Pointer instead of structure copy? percall_clone()/percall_free()?



> + /* always switch to a runnable fibril if we aren't being preempted */
> + if (unlikely(!(preempt_count() & PREEMPT_ACTIVE) &&
> + !list_empty(&prev->runnable_fibrils))) {
> + schedule_fibril(prev);
> + /*
> + * finish_fibril_switch() drops the rq lock and enables
> + * premption, but the popfl disables interrupts again. Watch
> + * me learn how context switch locking works before your very
> + * eyes! XXX This will need to be fixed up by throwing
> + * together something like the prepare_lock_switch() path the
> + * scheduler does. Guidance appreciated!
> + */
> + local_irq_enable();
> + return;
> + }

Yes, please (prepare/finish) ... ;)



- Davide


-
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: 2007-02-04 06:15    [W:0.437 / U:0.664 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site