On Thu, 21 Jun 2007, Christoph Lameter wrote: > On Thu, 21 Jun 2007, Hugh Dickins wrote: > > > Seems a little odd that it's gone throughout 2.6.22-rc unnoticed > > until now - nobody else trying SLUB on ARM or PA-RISC yet perhaps. > > The impact is only on a subset of ARM machines. > > PA_RISC? It looks like they run their own flushing function for byte > ranges called flush_kernel_dache_range. That does not use the page struct.
PA-RISC does have a function of that name, and I'm guessing that you came across it in looking at the PA-RISC dma_map_single. But PA-RISC also has a function called flush_dcache_page, which uses page_mapping and expects a struct address_space * from it. If that can ever be get applied to a SLOB page (which is not so clear as in the ARM case, but cannot easily be ruled out completely), we're in trouble without a PageSlab test within page_mapping. Hugh - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
