[lkml]   [2002]   [Mar]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: 2.4.18 Preempt Freezeups
   From: Ian Duggan <>
Date: Fri, 15 Mar 2002 00:38:37 -0800

What is required for preempt beyond "SMP safe" code? I thought the whole
idea was to make the preemptions transparent to other code by utilizing
the SMP critical regions?

Pre-empt makes things like per-cpu data structures require
preemption disables around cpu-local critical regions.

Code that works before just because it knows the data structure is
only even accessed by the current cpu doesn't work because preemption
can cause a context switch at any time.
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 13:21    [W:0.127 / U:53.292 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site