---

yaml --- r: 175710 b: refs/heads/master c: 8be8cf5 h: refs/heads/master v: v3
git-mirror · Oct 30, 2009 · 437b92f · 437b92f
1 parent 01ffc36
commit 437b92f
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Showing 3 changed files with 21 additions and 12 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 6cff46f4bc6cc4a8a4154b0b6a2e669db08e8fd2
+refs/heads/master: 8be8cf5b47f72096e42bf88cc3afff7a942a346c
diff --git a/trunk/arch/powerpc/platforms/pseries/Kconfig b/trunk/arch/powerpc/platforms/pseries/Kconfig
@@ -60,7 +60,7 @@ config PPC_SMLPAR
 
 config CMM
 	tristate "Collaborative memory management"
-	depends on PPC_SMLPAR && !CRASH_DUMP
+	depends on PPC_SMLPAR
 	default y
 	help
 	  Select this option, if you want to enable the kernel interface

diff --git a/trunk/arch/powerpc/platforms/pseries/cmm.c b/trunk/arch/powerpc/platforms/pseries/cmm.c
@@ -229,26 +229,35 @@ static void cmm_get_mpp(void)
 {
 	int rc;
 	struct hvcall_mpp_data mpp_data;
-	unsigned long active_pages_target;
-	signed long page_loan_request;
+	signed long active_pages_target, page_loan_request, target;
+	signed long total_pages = totalram_pages + loaned_pages;
+	signed long min_mem_pages = (min_mem_mb * 1024 * 1024) / PAGE_SIZE;
 
 	rc = h_get_mpp(&mpp_data);
 
 	if (rc != H_SUCCESS)
 		return;
 
 	page_loan_request = div_s64((s64)mpp_data.loan_request, PAGE_SIZE);
-	loaned_pages_target = page_loan_request + loaned_pages;
-	if (loaned_pages_target > oom_freed_pages)
-		loaned_pages_target -= oom_freed_pages;
+	target = page_loan_request + (signed long)loaned_pages;
+
+	if (target < 0 || total_pages < min_mem_pages)
+		target = 0;
+
+	if (target > oom_freed_pages)
+		target -= oom_freed_pages;
 	else
-		loaned_pages_target = 0;
+		target = 0;
+
+	active_pages_target = total_pages - target;
+
+	if (min_mem_pages > active_pages_target)
+		target = total_pages - min_mem_pages;
 
-	active_pages_target = totalram_pages + loaned_pages - loaned_pages_target;
+	if (target < 0)
+		target = 0;
 
-	if ((min_mem_mb * 1024 * 1024) > (active_pages_target * PAGE_SIZE))
-		loaned_pages_target = totalram_pages + loaned_pages -
-			((min_mem_mb * 1024 * 1024) / PAGE_SIZE);
+	loaned_pages_target = target;
 
 	cmm_dbg("delta = %ld, loaned = %lu, target = %lu, oom = %lu, totalram = %lu\n",
 		page_loan_request, loaned_pages, loaned_pages_target,