Messages in this thread | | | Date | Fri, 22 Jun 2007 05:26:33 +0100 (BST) | From | Hugh Dickins <> | Subject | Re: Oops in a driver while using SLUB as a SLAB allocator |
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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.
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