[lkml]   [2002]   [Aug]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [patch 4/21] fix ARCH_HAS_PREFETCH
Alan Cox wrote:
> On Wed, 2002-08-14 at 21:58, H. Peter Anvin wrote:
>>Since some processors now have "busy wait delay" instructions, this
>>would also make it possible to do:
> Nobody should be using an empty busy loop. If its a short timed busy
> loop then they should be using udelay, if its a long one
> schedule_timeout()


> If its polling hardware then it isnt an empty loop

True indeed as well, although we should still have a busy_wait(); macro
that can insert whatever hint instruction the architecture might or
might not have.


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 13:22    [W:0.194 / U:5.176 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site