lkml.org 
[lkml]   [2008]   [May]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subjectpci-gart_64.c: could we get better explanation?
    Hi!

    +++ b/arch/x86/kernel/pci-gart_64.c
    @@ -774,6 +778,7 @@ #endif

    /*
    * Try to workaround a bug (thanks to BenH)
    * Set unmapped entries to a scratch page instead of 0.
    * Any prefetches that hit unmapped entries won't get an bus abort

    Could someone explain? Which bug is being worked around? CPUs
    prefetching over NULL?
    Pavel
    --
    (english) http://www.livejournal.com/~pavelmachek
    (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

    \
     
     \ /
      Last update: 2008-05-26 20:49    [W:0.019 / U:0.144 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site