From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754932Ab2JPP76 (ORCPT ); Tue, 16 Oct 2012 11:59:58 -0400 Received: from mail-pb0-f46.google.com ([209.85.160.46]:35298 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754371Ab2JPP75 (ORCPT ); Tue, 16 Oct 2012 11:59:57 -0400 From: Ming Lei To: linux-kernel@vger.kernel.org Cc: Alan Stern , Oliver Neukum , Minchan Kim , Greg Kroah-Hartman , linux-usb@vger.kernel.org, linux-pm@vger.kernel.org Subject: [RFC PATCH v1 0/3] mm/PM/USB: memory allocation with no io in need Date: Tue, 16 Oct 2012 23:59:40 +0800 Message-Id: <1350403183-12650-1-git-send-email-ming.lei@canonical.com> X-Mailer: git-send-email 1.7.9.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, This patch set introduces one process flag and trys to fix one deadlock problem on block device during runtime resume or usb bus reset. The 1st one is the change on include/sched.h and mm. The other 2 patches are applied again PM and USB subsystem to demo how to use the introduced mechanism to fix the deadlock problem. V1: - take Minchan's change to avoid the check in alloc_page hot path - change the helpers' style into save/restore as suggested by Alan - memory allocation with no io in usb bus reset path for all devices as suggested by Greg and Oliver drivers/base/power/runtime.c | 14 ++++++++++++++ drivers/usb/core/hub.c | 11 +++++++++++ include/linux/sched.h | 11 +++++++++++ mm/page_alloc.c | 10 +++++++++- mm/vmscan.c | 13 +++++++++++++ 5 files changed, 58 insertions(+), 1 deletion(-) Thanks, -- Ming Lei