lkml.org 
[lkml]   [2008]   [Apr]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH] Replace completions with semaphores
    On Wed, 16 Apr 2008 18:31:08 +0200
    Oliver Neukum <oliver@neukum.org> wrote:

    > Am Mittwoch, 16. April 2008 18:16:52 schrieb Matthew Wilcox:
    > > The basic idea is that you get back a cookie from the
    > > kcounter_claim() which you have to hand to the kcounter_release()
    > > function so it knows which one you released.  It's similar to mutex
    > > debugging except
    >
    > So in addition to the kcounter we need to save a token in a data
    > structure? In fact, there must be a data structure that can house
    > that token. So you can no longer live with a pointer just to a device
    > descriptor, but every individual use of a resource must have an
    > associated data structure?

    yup. For kcounters there is a clear owner for each "slot".
    [This is the part that makes it debugable again)

    Now for non-debug builds, the space taken for the token can be.. zero
    depending on how we define the types for it.

    >
    > Regards
    > Oliver
    >
    > --
    > To unsubscribe from this list: send the line "unsubscribe
    > linux-kernel" in the body of a message to majordomo@vger.kernel.org
    > More majordomo info at http://vger.kernel.org/majordomo-info.html
    > Please read the FAQ at http://www.tux.org/lkml/


    --
    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
    --
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2008-04-16 18:53    [W:2.143 / U:0.032 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site