Hi Vale'rie,
I found a nasty bug in memrc-f0.4-2615-v2. Since the LSB of
page->mapping is used for a flag that shows whether it points
to anon_vma or address_space, its LSB must be off before using it
as the pointer to the anon_vma.
The problem is always reproducible on removing a class on which
kenbench is running.
The following patch is a sample fix.
Thanks,
MAEDA Naoaki
Index: linux-2.6.15-f0.4-cpurc-v0.3-mem/kernel/ckrm/ckrm_memctlr.c
===================================================================
--- linux-2.6.15-f0.4-cpurc-v0.3-mem.orig/kernel/ckrm/ckrm_memctlr.c
+++ linux-2.6.15-f0.4-cpurc-v0.3-mem/kernel/ckrm/ckrm_memctlr.c
@@ -149,7 +149,9 @@ ckrm_mem_evaluate_page_anon(struct page*
{
struct ckrm_mem_res* pgcls = page_ckrmzone(page)->memcls;
struct ckrm_mem_res* maxshareclass = NULL;
- struct anon_vma *anon_vma = (struct anon_vma *) page->mapping;
+ struct anon_vma *anon_vma =
+ (struct anon_vma *) ((unsigned long) page->mapping
+ - PAGE_MAPPING_ANON);
struct vm_area_struct *vma;
struct mm_struct* mm;
int ret = 0;
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