lkml.org 
[lkml]   [2008]   [Jan]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH] x86: Add a list for custom page fault handlers.
    On Sun, 27 Jan 2008 18:52:38 +0200
    Pekka Paalanen <pq@iki.fi> wrote:

    > From: Pekka Paalanen <pq@iki.fi>
    >
    > Provides kernel modules a way to register custom page fault handlers.
    > On every page fault, except those handled in vmalloc_fault(), this
    > will call a list of registered functions. The functions may handle
    > the fault and force do_page_fault() to return immediately.
    >
    > This functionality is similar to the now removed page fault notifiers.
    > Custom page fault handlers are used by debugging and reverse
    > engineering tools. Mmio-trace is one such tool and a patch to add it
    > into the tree will follow.
    >
    > The custom page fault handlers are called from the exact same points
    > in do_page_fault() as the page fault notifiers were.

    to be honest I don't like this approach.
    I fully would like to see mmio tracing in the kernel, but please
    make the hook explicit and direct (eg call the mmio tracing function,
    not some list) instead...


    --
    If you want to reach me at my work email, use arjan@linux.intel.com
    For development, discussion and tips for power savings,
    visit http://www.lesswatts.org


    \
     
     \ /
      Last update: 2008-01-30 19:23    [W:4.947 / U:0.000 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site