linux-kernel - [PATCH v4 6/8] vmcore: count holes generated by round-up operation for page boudary for size of /proc/vmcore

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Date:	Sat, 13 Apr 2013 09:21:40 +0900
From:	HATAYAMA Daisuke <d.hatayama@...fujitsu.com>
To:	vgoyal@...hat.com, ebiederm@...ssion.com, akpm@...ux-foundation.org
Cc:	cpw@....com, kumagai-atsushi@....nes.nec.co.jp,
	lisa.mitchell@...com, kexec@...ts.infradead.org,
	linux-kernel@...r.kernel.org, zhangyanfei@...fujitsu.com,
	jingbai.ma@...com
Subject: [PATCH v4 6/8] vmcore: count holes generated by round-up operation
 for page boudary for size of /proc/vmcore

Signed-off-by: HATAYAMA Daisuke <d.hatayama@...fujitsu.com>
---

 fs/proc/vmcore.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
index e27da40..029bdc0 100644
--- a/fs/proc/vmcore.c
+++ b/fs/proc/vmcore.c
@@ -266,7 +266,7 @@ static u64 __init get_vmcore_size_elf64(char *elfptr, size_t elfsz)
 	phdr_ptr = (Elf64_Phdr*)(elfptr + sizeof(Elf64_Ehdr));
 	size = elfsz;
 	for (i = 0; i < ehdr_ptr->e_phnum; i++) {
-		size += phdr_ptr->p_memsz;
+		size += roundup(phdr_ptr->p_memsz, PAGE_SIZE);
 		phdr_ptr++;
 	}
 	return size;
@@ -283,7 +283,7 @@ static u64 __init get_vmcore_size_elf32(char *elfptr, size_t elfsz)
 	phdr_ptr = (Elf32_Phdr*)(elfptr + sizeof(Elf32_Ehdr));
 	size = elfsz;
 	for (i = 0; i < ehdr_ptr->e_phnum; i++) {
-		size += phdr_ptr->p_memsz;
+		size += roundup(phdr_ptr->p_memsz, PAGE_SIZE);
 		phdr_ptr++;
 	}
 	return size;

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