From: Oleg Nesterov <oleg@redhat.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Matt Fleming <matt.fleming@linux.intel.com>,
Dave Hansen <dave@linux.vnet.ibm.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH] acct_arg_size: ptl is no longer needed for add_mm_counter()
Date: Wed, 13 Jul 2011 21:39:35 +0200 [thread overview]
Message-ID: <20110713193935.GA18026@redhat.com> (raw)
acct_arg_size() takes ->page_table_lock around add_mm_counter()
if !SPLIT_RSS_COUNTING. This is no needed after 172703b0
"mm: delete non-atomic mm counter implementation".
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---
fs/exec.c | 7 -------
1 file changed, 7 deletions(-)
--- ptrace/fs/exec.c~acct_arg_size-no-ptl 2011-07-10 16:20:01.000000000 +0200
+++ ptrace/fs/exec.c 2011-07-13 21:36:29.000000000 +0200
@@ -181,14 +181,7 @@ static void acct_arg_size(struct linux_b
return;
bprm->vma_pages = pages;
-
-#ifdef SPLIT_RSS_COUNTING
add_mm_counter(mm, MM_ANONPAGES, diff);
-#else
- spin_lock(&mm->page_table_lock);
- add_mm_counter(mm, MM_ANONPAGES, diff);
- spin_unlock(&mm->page_table_lock);
-#endif
}
static struct page *get_arg_page(struct linux_binprm *bprm, unsigned long pos,
next reply other threads:[~2011-07-13 19:42 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-13 19:39 Oleg Nesterov [this message]
2011-07-14 13:44 ` [PATCH] acct_arg_size: ptl is no longer needed for add_mm_counter() Matt Fleming
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