[lkml]   [2009]   [Sep]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH v2] core, x86: Add user return notifiers
On 09/22/2009 07:55 PM, Peter Zijlstra wrote:
>> If you're using lockdep, surely that's not your biggest worry?
> No, but that's all under #ifdef and fully disappears when not enabled.
> Generic return-tu-user notifiers don't sound like they will though.

They will if not selected. If selected and not armed, they will have
zero runtime impact since they piggyback on existing branches
(_TIF_DO_NOTIFY_MASK and near relatives). If selected and armed they'll
cause __switch_to_xtra() on every context switch and do_notity_resume()
on syscall exit until disarmed, but then you've asked for it.

error compiling committee.c: too many arguments to function

 \ /
  Last update: 2009-09-22 19:09    [W:0.061 / U:0.424 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site