[Xen-changelog] [xen-unstable] Low mem virq incremental adjustments

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Andres Lagar-Cavilla <andres@xxxxxxxxxxxxxxxx>
# Date 1331197522 0
# Node ID 56ca2b874928af0352e445ee31aefe5d7fda2f49
# Parent  f611200469159a960c3f0b975aa0f91ec768e29f
Low mem virq incremental adjustments

Consider tmem before firing the virq.

Add .gitignore rune.

Signed-off-by: Andres Lagar-Cavilla <andres@xxxxxxxxxxxxxxxx>
Acked-by: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>
Committed-by: Keir Fraser <keir@xxxxxxx>
---


diff -r f61120046915 -r 56ca2b874928 .gitignore
--- a/.gitignore        Wed Mar 07 11:50:31 2012 +0100
+++ b/.gitignore        Thu Mar 08 09:05:22 2012 +0000
@@ -203,6 +203,7 @@
 tools/misc/gtraceview
 tools/misc/gtracestat
 tools/misc/xenlockprof
+tools/misc/lowmemd
 tools/pygrub/build/*
 tools/python/build/*
 tools/python/xen/util/path.py
diff -r f61120046915 -r 56ca2b874928 xen/common/page_alloc.c
--- a/xen/common/page_alloc.c   Wed Mar 07 11:50:31 2012 +0100
+++ b/xen/common/page_alloc.c   Thu Mar 08 09:05:22 2012 +0000
@@ -373,7 +373,10 @@
 
 static void check_low_mem_virq(void)
 {
-    if ( unlikely(total_avail_pages <= low_mem_virq_th) )
+    unsigned long avail_pages = total_avail_pages +
+        opt_tmem ? tmem_freeable_pages() : 0;
+
+    if ( unlikely(avail_pages <= low_mem_virq_th) )
     {
         send_global_virq(VIRQ_ENOMEM);
 
@@ -387,7 +390,7 @@
         return;
     }
 
-    if ( unlikely(total_avail_pages >= low_mem_virq_high) )
+    if ( unlikely(avail_pages >= low_mem_virq_high) )
     {
         /* Reset hysteresis. Bring threshold up one order.
          * If we are back where originally set, set high

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