lkml.org 
[lkml]   [2008]   [Apr]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [RFC PATCH] x86 NMI-safe INT3 and Page Fault (v5)
    * Andi Kleen (andi@firstfloor.org) wrote:
    > Mathieu Desnoyers wrote:
    > > * Andi Kleen (andi@firstfloor.org) wrote:
    > >> Mathieu Desnoyers <compudj@krystal.dyndns.org> writes:
    > >>> It allows placing immediate values (and therefore optimized trace_marks) in NMI
    > >>> code
    > >> Only if all your trace_mark infrastructure is lock less.
    > >>
    > >> -Andi
    > >>
    > >
    > > It uses RCU-style updates and has been designed to be lockless from the
    > > ground up.
    >
    > Wrong. If it causes vmalloc faults it is not lockless.
    >
    > -Andi
    >

    Could you point me where vmalloc_fault accesses a data structure for
    which updates are protected by disabling interrupts ? I am curious.

    Mathieu


    --
    Mathieu Desnoyers
    Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
    OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68


    \
     
     \ /
      Last update: 2008-04-19 23:07    [W:0.022 / U:30.624 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site