From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933023AbbAFVeM (ORCPT ); Tue, 6 Jan 2015 16:34:12 -0500 Received: from mail-qa0-f42.google.com ([209.85.216.42]:39951 "EHLO mail-qa0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932744AbbAFV1N (ORCPT ); Tue, 6 Jan 2015 16:27:13 -0500 From: Tejun Heo To: axboe@kernel.dk Cc: linux-kernel@vger.kernel.org, jack@suse.cz, hch@infradead.org, hannes@cmpxchg.org, linux-fsdevel@vger.kernel.org, vgoyal@redhat.com, lizefan@huawei.com, cgroups@vger.kernel.org, linux-mm@kvack.org, mhocko@suse.cz, clm@fb.com, fengguang.wu@intel.com, david@fromorbit.com, Tejun Heo Subject: [PATCH 24/45] writeback: add wb_writeback_work->auto_free Date: Tue, 6 Jan 2015 16:26:01 -0500 Message-Id: <1420579582-8516-25-git-send-email-tj@kernel.org> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1420579582-8516-1-git-send-email-tj@kernel.org> References: <1420579582-8516-1-git-send-email-tj@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Currently, a wb_writeback_work is freed automatically on completion if it doesn't have ->done set. Add wb_writeback_work->auto_free to make the switch explicit. This will help cgroup writeback support where waiting for completion and whether to free automatically don't necessarily move together. Signed-off-by: Tejun Heo Cc: Jens Axboe Cc: Jan Kara --- fs/fs-writeback.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 8bf13e6..3c012b8 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -47,6 +47,7 @@ struct wb_writeback_work { unsigned int range_cyclic:1; unsigned int for_background:1; unsigned int for_sync:1; /* sync(2) WB_SYNC_ALL writeback */ + unsigned int auto_free:1; /* free on completion */ enum wb_reason reason; /* why was writeback initiated? */ struct list_head list; /* pending work list */ @@ -272,6 +273,7 @@ void wb_start_writeback(struct bdi_writeback *wb, long nr_pages, work->nr_pages = nr_pages; work->range_cyclic = range_cyclic; work->reason = reason; + work->auto_free = 1; wb_queue_work(wb, work); } @@ -1173,19 +1175,16 @@ static long wb_do_writeback(struct bdi_writeback *wb) set_bit(WB_writeback_running, &wb->state); while ((work = get_next_work_item(wb)) != NULL) { + struct completion *done = work->done; trace_writeback_exec(wb->bdi, work); wrote += wb_writeback(wb, work); - /* - * Notify the caller of completion if this is a synchronous - * work item, otherwise just free it. - */ - if (work->done) - complete(work->done); - else + if (work->auto_free) kfree(work); + if (done) + complete(done); } /* -- 2.1.0