lkml.org 
[lkml]   [2007]   [Jun]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: Oops in a driver while using SLUB as a SLAB allocator
    On Thu, 21 Jun 2007, Christoph Lameter wrote:
    > On Thu, 21 Jun 2007, Hugh Dickins wrote:
    >
    > > > The oops seems to occur after a page unmapping using dma_unmap_page() followed
    > > > by a flush_dcache_page() (in at91mci_post_dma_read()).
    >
    > Was the page allocated using slab calls?

    You've found yes (in the ARM case).

    > Well one may be better off allocating pages using the page allocator
    > instead of the slab allocator. I removed these things from i386 but I did
    > not check ARM.

    They may or may not be: I think that's a matter to discuss with rmk.

    You keep on forcing the outside world to revolve around your needs
    within slub.c: that is a good way to keep slub lean, and may be
    justified; but it's at least questionable to be enforcing such
    restrictions years after people have grown accustomed to more
    freedom from their slabs.

    Hugh
    -
    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: 2007-06-22 06:29    [W:7.897 / U:0.700 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site