[Xen-changelog] [xen-unstable] xenpaging: track the number of paged-out pages

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Olaf Hering <olaf@xxxxxxxxx>
# Date 1321804958 -3600
# Node ID dc7dabe2fe99d29ccdc8c9e64458c09ecf6a48b5
# Parent  f06595abfa8874edb60371f4b5392bb75b3df2d0
xenpaging: track the number of paged-out pages

This change is required by subsequent changes.

Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
---


diff -r f06595abfa88 -r dc7dabe2fe99 tools/xenpaging/xenpaging.c
--- a/tools/xenpaging/xenpaging.c       Sun Nov 20 17:02:36 2011 +0100
+++ b/tools/xenpaging/xenpaging.c       Sun Nov 20 17:02:38 2011 +0100
@@ -467,6 +467,9 @@
     /* Notify policy of page being paged out */
     policy_notify_paged_out(victim->gfn);
 
+    /* Record number of evicted pages */
+    paging->num_paged_out++;
+
  out:
     return ret;
 }
@@ -480,8 +483,13 @@
 
     /* Notify policy of page being paged in */
     if ( notify_policy )
+    {
         policy_notify_paged_in(rsp->gfn);
 
+       /* Record number of resumed pages */
+       paging->num_paged_out--;
+    }
+
     /* Tell Xen page is ready */
     ret = xc_mem_paging_resume(paging->xc_handle, paging->mem_event.domain_id,
                                rsp->gfn);
diff -r f06595abfa88 -r dc7dabe2fe99 tools/xenpaging/xenpaging.h
--- a/tools/xenpaging/xenpaging.h       Sun Nov 20 17:02:36 2011 +0100
+++ b/tools/xenpaging/xenpaging.h       Sun Nov 20 17:02:38 2011 +0100
@@ -49,6 +49,7 @@
     mem_event_t mem_event;
     /* number of pages for which data structures were allocated */
     int max_pages;
+    int num_paged_out;
     int num_pages;
     int policy_mru_size;
     unsigned long pagein_queue[XENPAGING_PAGEIN_QUEUE_SIZE];

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