I run linux swap less and xwindows become not respond sometime. The bug is share swapper_space over all mappings of memory. Also the dmesg show several lines which is hidden before. Test of 3.0.51 fail near the end of kernel compilation. I run 3.0.50 successly a hours. *** linux-3.0.50.a/include/linux/mm.h 2012-10-31 20:51:59.000000000 +0400 --- linux-3.0.50.b/include/linux/mm.h 2012-11-17 19:44:56.864762720 +0400 *************** *** 787,793 **** struct address_space *mapping = page->mapping; VM_BUG_ON(PageSlab(page)); ! if (unlikely(PageSwapCache(page))) mapping = &swapper_space; else if ((unsigned long)mapping & PAGE_MAPPING_ANON) mapping = NULL; --- 787,793 ---- struct address_space *mapping = page->mapping; VM_BUG_ON(PageSlab(page)); ! if (likely(PageSwapCache(page))) mapping = &swapper_space; else if ((unsigned long)mapping & PAGE_MAPPING_ANON) mapping = NULL; -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>