From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760946AbaJ3TnU (ORCPT ); Thu, 30 Oct 2014 15:43:20 -0400 Received: from theshire.emacs.cl ([192.155.80.235]:36086 "EHLO theshire.emacs.cl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758724AbaJ3TmW (ORCPT ); Thu, 30 Oct 2014 15:42:22 -0400 From: Davidlohr Bueso To: akpm@linux-foundation.org Cc: hughd@google.com, riel@redhat.com, mgorman@suse.de, peterz@infradead.org, mingo@kernel.org, linux-kernel@vger.kernel.org, dbueso@suse.de, linux-mm@kvack.org, Davidlohr Bueso Subject: [PATCH 07/10] mm/memory-failure: share the i_mmap_rwsem Date: Thu, 30 Oct 2014 12:34:14 -0700 Message-Id: <1414697657-1678-8-git-send-email-dave@stgolabs.net> X-Mailer: git-send-email 1.8.4.5 In-Reply-To: <1414697657-1678-1-git-send-email-dave@stgolabs.net> References: <1414697657-1678-1-git-send-email-dave@stgolabs.net> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org No brainer conversion: collect_procs_file() only schedules a process for later kill, share the lock, similarly to the anon vma variant. Signed-off-by: Davidlohr Bueso Acked-by: Kirill A. Shutemov --- mm/memory-failure.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/memory-failure.c b/mm/memory-failure.c index e1646fe..e619625 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -466,7 +466,7 @@ static void collect_procs_file(struct page *page, struct list_head *to_kill, struct task_struct *tsk; struct address_space *mapping = page->mapping; - i_mmap_lock_write(mapping); + i_mmap_lock_read(mapping); read_lock(&tasklist_lock); for_each_process(tsk) { pgoff_t pgoff = page_to_pgoff(page); @@ -488,7 +488,7 @@ static void collect_procs_file(struct page *page, struct list_head *to_kill, } } read_unlock(&tasklist_lock); - i_mmap_unlock_write(mapping); + i_mmap_unlock_read(mapping); } /* -- 1.8.4.5