[Xen-devel] [PATCH] Low mem virq incremental adjustments

[Andres Lagar-Cavilla <andres@xxxxxxxxxxxxxxxx>]

 .gitignore              |  1 +
 xen/common/page_alloc.c |  7 +++++--
 2 files changed, 6 insertions(+), 2 deletions(-)


Consider tmem before firing the virq.

Add .gitignore rune.

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

diff -r f7ce6d26635c -r 5651945c7a74 .gitignore
--- a/.gitignore
+++ b/.gitignore
@@ -197,6 +197,7 @@ tools/misc/xen-hvmctx
 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 f7ce6d26635c -r 5651945c7a74 xen/common/page_alloc.c
--- a/xen/common/page_alloc.c
+++ b/xen/common/page_alloc.c
@@ -377,7 +377,10 @@ static void __init setup_low_mem_virq(vo
 
 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);
 
@@ -391,7 +394,7 @@ static void check_low_mem_virq(void)
         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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