On Fri, May 02, 2014 at 11:20:33AM -0400, Mark Salter wrote: > As explained in more detail in the second patch, I have observed a soft > lockup under some loads. These lockups were in flush_tlb_kernel_range() > which was looping through a very large address range. While looking into > this, I also noticed the flush routines in tlb.S were not properly > handling pages larger than 4k. This is corrected in the first patch. > The second patch limits the loop size for the flush_tlb_[kernel_]range > functions. It uses an arbitrary constant to limit the loop, but it > would be better if it were based on actual tlb size or some other > heuristic. > > Mark Salter (2): > arm64: fix unnecessary tlb flushes > arm64: fix soft lockup due to large tlb flush range > > arch/arm64/include/asm/tlbflush.h | 28 +++++++++++++++++++++++++--- > arch/arm64/mm/tlb.S | 4 ++-- > 2 files changed, 27 insertions(+), 5 deletions(-) >
Hi Mark, As a heads-up, I posted this earlier today: http://lists.infradead.org/pipermail/linux-arm-kernel/2014-May/252837.html Cheers, -- Steve -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
