* Patch "x86/mm: TLB_REMOTE_SEND_IPI should count pages" has been added to the 4.4-stable tree
@ 2016-04-09 23:05 gregkh
0 siblings, 0 replies; only message in thread
From: gregkh @ 2016-04-09 23:05 UTC (permalink / raw)
To: namit, akpm, dave.hansen, gregkh, mgorman, mingo, riel, torvalds
Cc: stable, stable-commits
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 <stable@vger.kernel.org> know about it.
>From 18c98243ddf05a1827ad2c359c5ac051101e7ff7 Mon Sep 17 00:00:00 2001
From: Nadav Amit <namit@vmware.com>
Date: Fri, 1 Apr 2016 14:31:23 -0700
Subject: x86/mm: TLB_REMOTE_SEND_IPI should count pages
From: Nadav Amit <namit@vmware.com>
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 <namit@vmware.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
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
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2016-04-09 23:05 Patch "x86/mm: TLB_REMOTE_SEND_IPI should count pages" has been added to the 4.4-stable tree gregkh
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