[Xen-devel] [PATCH] xl tmem-freeable

[Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>]

(Finally getting my feet wet in xl-land!)

Implement "xl tmem-freeable" to match "xm tmem-freeable".

(Please apply to 4.0-testing also if possible.)

Signed-off-by: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>

diff -r d867eb643fe4 tools/libxl/libxl.c
--- a/tools/libxl/libxl.c       Tue Jul 13 18:17:28 2010 +0100
+++ b/tools/libxl/libxl.c       Fri Jul 16 12:13:46 2010 -0600
@@ -3181,3 +3181,17 @@
     return rc;
 }
 
+int libxl_tmem_freeable(struct libxl_ctx *ctx)
+{
+    int rc;
+
+    rc = xc_tmem_control(ctx->xch, -1, TMEMC_QUERY_FREEABLE_MB, -1, 0, 0, 0, 
0);
+    if (rc < 0) {
+        XL_LOG_ERRNOVAL(ctx, XL_LOG_ERROR, rc,
+            "Can not get tmem freeable memory");
+        return -1;
+    }
+
+    return rc;
+}
+
diff -r d867eb643fe4 tools/libxl/libxl.h
--- a/tools/libxl/libxl.h       Tue Jul 13 18:17:28 2010 +0100
+++ b/tools/libxl/libxl.h       Fri Jul 16 12:13:46 2010 -0600
@@ -556,6 +556,7 @@
                    uint32_t set);
 int libxl_tmem_shared_auth(struct libxl_ctx *ctx, uint32_t domid, char* uuid,
                            int auth);
+int libxl_tmem_freeable(struct libxl_ctx *ctx);
 
 typedef struct {
     char *backend;
diff -r d867eb643fe4 tools/libxl/xl.h
--- a/tools/libxl/xl.h  Tue Jul 13 18:17:28 2010 +0100
+++ b/tools/libxl/xl.h  Fri Jul 16 12:13:46 2010 -0600
@@ -72,6 +72,7 @@
 int main_tmem_thaw(int argc, char **argv);
 int main_tmem_set(int argc, char **argv);
 int main_tmem_shared_auth(int argc, char **argv);
+int main_tmem_freeable(int argc, char **argv);
 int main_network2attach(int argc, char **argv);
 int main_network2list(int argc, char **argv);
 int main_network2detach(int argc, char **argv);
diff -r d867eb643fe4 tools/libxl/xl_cmdimpl.c
--- a/tools/libxl/xl_cmdimpl.c  Tue Jul 13 18:17:28 2010 +0100
+++ b/tools/libxl/xl_cmdimpl.c  Fri Jul 16 12:13:46 2010 -0600
@@ -4537,3 +4537,26 @@
     exit(0);
 }
 
+int main_tmem_freeable(int argc, char **argv)
+{
+    int opt;
+    int mb;
+
+    while ((opt = getopt(argc, argv, "h")) != -1) {
+        switch (opt) {
+        case 'h':
+            help("tmem-freeable");
+            exit(0);
+        default:
+            fprintf(stderr, "option `%c' not supported.\n", opt);
+            break;
+        }
+    }
+
+    mb = libxl_tmem_freeable(&ctx);
+    if (mb == -1)
+        exit(-1);
+
+    printf("%d\n", mb);
+    exit(0);
+}
diff -r d867eb643fe4 tools/libxl/xl_cmdtable.c
--- a/tools/libxl/xl_cmdtable.c Tue Jul 13 18:17:28 2010 +0100
+++ b/tools/libxl/xl_cmdtable.c Fri Jul 16 12:13:46 2010 -0600
@@ -295,6 +295,11 @@
       "                                 
(abcdef01-2345-6789-1234-567890abcdef)\n"
       "  -A AUTH                        0=auth,1=deauth",
     },
+    { "tmem-freeable",
+      &main_tmem_freeable,
+      "Get information about how much freeable memory (MB) is in-use by tmem",
+      "",
+    },
     { "network2-attach",
       &main_network2attach,
       "Create a new version 2 virtual network device",

Attachment: xl_tmem_freeable.patch
Description: Binary data

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