[Xen-devel] [PATCH 2/2] x86/PoD: clean up types

["Jan Beulich" <JBeulich@xxxxxxxx>]

GMFN values must undoubtedly be "unsigned long". "count" and
"entry_count", since they are signed types, should also be "long" as
otherwise they can't fit all values that can fit into "d->tot_pages"
(which currently is "uint32_t").

Beyond that, the patch doesn't convert everything to "long" as in many
places it is clear that "int" suffices. In places where "long" is being
used partially already, the change is however being done.

Furthermore, page order values have no use of being "long".

Finally, in the course of updating a few printk messages anyway, some
also get slightly shortened (to focus on the relevant information).

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

--- a/xen/arch/x86/mm/p2m-pod.c
+++ b/xen/arch/x86/mm/p2m-pod.c
@@ -66,7 +66,7 @@ static inline void unlock_page_alloc(str
 static int
 p2m_pod_cache_add(struct p2m_domain *p2m,
                   struct page_info *page,
-                  unsigned long order)
+                  unsigned int order)
 {
     int i;
     struct page_info *p;
@@ -80,7 +80,7 @@ p2m_pod_cache_add(struct p2m_domain *p2m
     /* Check to make sure this is a contiguous region */
     if( mfn_x(mfn) & ((1 << order) - 1) )
     {
-        printk("%s: mfn %lx not aligned order %lu! (mask %lx)\n",
+        printk("%s: mfn %lx not aligned order %u! (mask %lx)\n",
                __func__, mfn_x(mfn), order, ((1UL << order) - 1));
         return -1;
     }
@@ -146,7 +146,7 @@ p2m_pod_cache_add(struct p2m_domain *p2m
  * down 2-meg pages into singleton pages automatically.  Returns null if
  * a superpage is requested and no superpages are available. */
 static struct page_info * p2m_pod_cache_get(struct p2m_domain *p2m,
-                                            unsigned long order)
+                                            unsigned int order)
 {
     struct page_info *p = NULL;
     int i;
@@ -234,7 +234,7 @@ p2m_pod_set_cache_target(struct p2m_doma
                 goto retry;
             }   
             
-            printk("%s: Unable to allocate domheap page for pod cache.  target 
%lu cachesize %d\n",
+            printk("%s: Unable to allocate page for PoD cache (target=%lu 
cache=%ld)\n",
                    __func__, pod_target, p2m->pod.count);
             ret = -ENOMEM;
             goto out;
@@ -337,10 +337,9 @@ out:
 int
 p2m_pod_set_mem_target(struct domain *d, unsigned long target)
 {
-    unsigned pod_target;
     struct p2m_domain *p2m = p2m_get_hostp2m(d);
     int ret = 0;
-    unsigned long populated;
+    unsigned long populated, pod_target;
 
     pod_lock(p2m);
 
@@ -633,7 +632,8 @@ out_unlock:
 void p2m_pod_dump_data(struct domain *d)
 {
     struct p2m_domain *p2m = p2m_get_hostp2m(d);
-    printk("    PoD entries=%d cachesize=%d\n",
+
+    printk("    PoD entries=%ld cachesize=%ld\n",
            p2m->pod.entry_count, p2m->pod.count);
 }
 
@@ -1071,8 +1071,9 @@ p2m_pod_demand_populate(struct p2m_domai
 out_of_memory:
     pod_unlock(p2m);
 
-    printk("%s: Out of populate-on-demand memory! tot_pages %" PRIu32 " 
pod_entries %" PRIi32 "\n",
-           __func__, d->tot_pages, p2m->pod.entry_count);
+    printk("%s: Dom%d out of PoD memory! (tot=%"PRIu32" ents=%ld dom%d)\n",
+           __func__, d->domain_id, d->tot_pages, p2m->pod.entry_count,
+           current->domain->domain_id);
     domain_crash(d);
     return -1;
 out_fail:
@@ -1111,10 +1112,9 @@ guest_physmap_mark_populate_on_demand(st
                                       unsigned int order)
 {
     struct p2m_domain *p2m = p2m_get_hostp2m(d);
-    unsigned long i;
+    unsigned long i, pod_count = 0;
     p2m_type_t ot;
     mfn_t omfn;
-    int pod_count = 0;
     int rc = 0;
 
     BUG_ON(!paging_mode_translate(d));
--- a/xen/arch/x86/mm/p2m-pt.c
+++ b/xen/arch/x86/mm/p2m-pt.c
@@ -965,8 +965,7 @@ static void p2m_change_type_global(struc
 #if P2M_AUDIT
 long p2m_pt_audit_p2m(struct p2m_domain *p2m)
 {
-    int entry_count = 0;
-    unsigned long pmbad = 0;
+    unsigned long entry_count = 0, pmbad = 0;
     unsigned long mfn, gfn, m2pfn;
     int test_linear;
     struct domain *d = p2m->domain;
@@ -1126,7 +1125,7 @@ long p2m_pt_audit_p2m(struct p2m_domain 
 
     if ( entry_count != p2m->pod.entry_count )
     {
-        printk("%s: refcounted entry count %d, audit count %d!\n",
+        printk("%s: refcounted entry count %ld, audit count %lu!\n",
                __func__,
                p2m->pod.entry_count,
                entry_count);
--- a/xen/include/asm-x86/p2m.h
+++ b/xen/include/asm-x86/p2m.h
@@ -282,10 +282,10 @@ struct p2m_domain {
     struct {
         struct page_list_head super,   /* List of superpages                */
                          single;       /* Non-super lists                   */
-        int              count,        /* # of pages in cache lists         */
+        long             count,        /* # of pages in cache lists         */
                          entry_count;  /* # of pages in p2m marked pod      */
-        unsigned         reclaim_single; /* Last gpfn of a scan */
-        unsigned         max_guest;    /* gpfn of max guest demand-populate */
+        unsigned long    reclaim_single; /* Last gpfn of a scan */
+        unsigned long    max_guest;    /* gpfn of max guest demand-populate */
 #define POD_HISTORY_MAX 128
         /* gpfn of last guest superpage demand-populated */
         unsigned long    last_populated[POD_HISTORY_MAX];

Attachment: x86-PoD-types.patch
Description: Text document

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