From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gum.cmpxchg.org ([85.214.110.215]:45874 "EHLO gum.cmpxchg.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751788AbeBEXCB (ORCPT ); Mon, 5 Feb 2018 18:02:01 -0500 Date: Mon, 5 Feb 2018 18:02:31 -0500 From: Johannes Weiner To: Tejun Heo Cc: Jens Axboe , Miklos Szeredi , Joshua Miller , kernel-team@fb.com, Jan Kara , stable@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: Re: [PATCH 1/2] bdi: make sure congestion states are clear on free Message-ID: <20180205230231.GA24824@cmpxchg.org> References: <20180202175328.GL1121507@devbig577.frc2.facebook.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180202175328.GL1121507@devbig577.frc2.facebook.com> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: On Fri, Feb 02, 2018 at 09:53:28AM -0800, Tejun Heo wrote: > FUSE has a bug where it fails to clear congestion states if a > connection gets aborted while congested, which can leave > nr_wb_congested[] stuck until reboot causing wait_iff_congested() to > wait spuriously. > > While the bdi owner, FUSE, is primarily responsible for clearing > congestion states before destroying bdi_writebacks, bdi layer can > ensure that congestion states are not leaked beyond bdi_writeback > lifecycle. > > Signed-off-by: Tejun Heo > Reported-by: Joshua Miller > Cc: Johannes Weiner > Cc: Jan Kara > Cc: stable@vger.kernel.org Acked-by: Johannes Weiner