From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:44168 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751071AbcDIXFk (ORCPT ); Sat, 9 Apr 2016 19:05:40 -0400 Subject: Patch "x86/mm: TLB_REMOTE_SEND_IPI should count pages" has been added to the 4.4-stable tree To: namit@vmware.com, akpm@linux-foundation.org, dave.hansen@intel.com, gregkh@linuxfoundation.org, mgorman@suse.de, mingo@kernel.org, riel@redhat.com, torvalds@linux-foundation.org Cc: , From: Date: Sat, 09 Apr 2016 16:05:39 -0700 Message-ID: <146024313994203@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled x86/mm: TLB_REMOTE_SEND_IPI should count pages to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: x86-mm-tlb_remote_send_ipi-should-count-pages.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 18c98243ddf05a1827ad2c359c5ac051101e7ff7 Mon Sep 17 00:00:00 2001 From: Nadav Amit Date: Fri, 1 Apr 2016 14:31:23 -0700 Subject: x86/mm: TLB_REMOTE_SEND_IPI should count pages From: Nadav Amit commit 18c98243ddf05a1827ad2c359c5ac051101e7ff7 upstream. TLB_REMOTE_SEND_IPI was recently introduced, but it counts bytes instead of pages. In addition, it does not report correctly the case in which flush_tlb_page flushes a page. Fix it to be consistent with other TLB counters. Fixes: 5b74283ab251b9d ("x86, mm: trace when an IPI is about to be sent") Signed-off-by: Nadav Amit Cc: Mel Gorman Cc: Rik van Riel Cc: Dave Hansen Cc: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman --- arch/x86/mm/tlb.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) --- a/arch/x86/mm/tlb.c +++ b/arch/x86/mm/tlb.c @@ -106,8 +106,6 @@ static void flush_tlb_func(void *info) if (f->flush_mm != this_cpu_read(cpu_tlbstate.active_mm)) return; - if (!f->flush_end) - f->flush_end = f->flush_start + PAGE_SIZE; count_vm_tlb_event(NR_TLB_REMOTE_FLUSH_RECEIVED); if (this_cpu_read(cpu_tlbstate.state) == TLBSTATE_OK) { @@ -135,12 +133,20 @@ void native_flush_tlb_others(const struc unsigned long end) { struct flush_tlb_info info; + + if (end == 0) + end = start + PAGE_SIZE; info.flush_mm = mm; info.flush_start = start; info.flush_end = end; count_vm_tlb_event(NR_TLB_REMOTE_FLUSH); - trace_tlb_flush(TLB_REMOTE_SEND_IPI, end - start); + if (end == TLB_FLUSH_ALL) + trace_tlb_flush(TLB_REMOTE_SEND_IPI, TLB_FLUSH_ALL); + else + trace_tlb_flush(TLB_REMOTE_SEND_IPI, + (end - start) >> PAGE_SHIFT); + if (is_uv_system()) { unsigned int cpu; Patches currently in stable-queue which might be from namit@vmware.com are queue-4.4/x86-mm-tlb_remote_send_ipi-should-count-pages.patch