From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from d03relay02.boulder.ibm.com (d03relay02.boulder.ibm.com [9.17.195.227]) by e35.co.us.ibm.com (8.13.8/8.13.8) with ESMTP id l7LKgvAX015010 for ; Tue, 21 Aug 2007 16:42:57 -0400 Received: from d03av01.boulder.ibm.com (d03av01.boulder.ibm.com [9.17.195.167]) by d03relay02.boulder.ibm.com (8.13.8/8.13.8/NCO v8.5) with ESMTP id l7LKgvar269216 for ; Tue, 21 Aug 2007 14:42:57 -0600 Received: from d03av01.boulder.ibm.com (loopback [127.0.0.1]) by d03av01.boulder.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id l7LKgut0002970 for ; Tue, 21 Aug 2007 14:42:56 -0600 Subject: [RFC][PATCH 6/9] pagemap: give -1's a name From: Dave Hansen Date: Tue, 21 Aug 2007 13:42:54 -0700 References: <20070821204248.0F506A29@kernel> In-Reply-To: <20070821204248.0F506A29@kernel> Message-Id: <20070821204254.E248E22C@kernel> Sender: owner-linux-mm@kvack.org Return-Path: To: mpm@selenic.com Cc: linux-mm@kvack.org, Dave Hansen List-ID: -1 is a magic number in /proc/$pid/pagemap. It means that there was no pte present for a particular page. We're going to be refining that a bit shortly, so give this a real name for now. Signed-off-by: Dave Hansen --- lxc-dave/fs/proc/task_mmu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff -puN fs/proc/task_mmu.c~give_-1s_a_name fs/proc/task_mmu.c --- lxc/fs/proc/task_mmu.c~give_-1s_a_name 2007-08-21 13:30:53.000000000 -0700 +++ lxc-dave/fs/proc/task_mmu.c 2007-08-21 13:30:53.000000000 -0700 @@ -509,6 +509,7 @@ struct pagemapread { }; #define PM_ENTRY_BYTES sizeof(unsigned long) +#define PM_NOT_PRESENT ((unsigned long)-1) static int add_to_pagemap(unsigned long addr, unsigned long pfn, struct pagemapread *pm) @@ -533,7 +534,7 @@ static int pagemap_pte_range(pmd_t *pmd, if (addr < pm->next) continue; if (!pte_present(*pte)) - err = add_to_pagemap(addr, -1, pm); + err = add_to_pagemap(addr, PM_NOT_PRESENT, pm); else err = add_to_pagemap(addr, pte_pfn(*pte), pm); if (err) _ -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org