3.10-stable review patch. If anyone has any objections, please let me know.
------------------ From: Vineet Gupta <[email protected]> commit e6c495a96ce02574e765d5140039a64c8d4e8c9e upstream. zap_pte_range loops from @addr to @end. In the middle, if it runs out of batching slots, TLB entries needs to be flushed for @start to @interim, NOT @interim to @end. Since ARC port doesn't use page free batching I can't test it myself but this seems like the right thing to do. Observed this when working on a fix for the issue at thread: http://www.spinics.net/lists/linux-arch/msg21736.html Signed-off-by: Vineet Gupta <[email protected]> Cc: Mel Gorman <[email protected]> Cc: Hugh Dickins <[email protected]> Cc: Rik van Riel <[email protected]> Cc: David Rientjes <[email protected]> Cc: Peter Zijlstra <[email protected]> Acked-by: Catalin Marinas <[email protected]> Cc: Max Filippov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- mm/memory.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) --- a/mm/memory.c +++ b/mm/memory.c @@ -1101,6 +1101,7 @@ static unsigned long zap_pte_range(struc spinlock_t *ptl; pte_t *start_pte; pte_t *pte; + unsigned long range_start = addr; again: init_rss_vec(rss); @@ -1206,12 +1207,14 @@ again: force_flush = 0; #ifdef HAVE_GENERIC_MMU_GATHER - tlb->start = addr; - tlb->end = end; + tlb->start = range_start; + tlb->end = addr; #endif tlb_flush_mmu(tlb); - if (addr != end) + if (addr != end) { + range_start = addr; goto again; + } } return addr; -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
