From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-10.6 required=5.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable autolearn_force=no version=3.4.2 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id C3FD57D04D for ; Fri, 11 Jan 2019 06:26:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728590AbfAKG0B (ORCPT ); Fri, 11 Jan 2019 01:26:01 -0500 Received: from mail.kernel.org ([198.145.29.99]:45736 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728295AbfAKG0B (ORCPT ); Fri, 11 Jan 2019 01:26:01 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8D94E20870; Fri, 11 Jan 2019 06:25:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1547187960; bh=BZq7W/mq1WwQjUnjQg0GbBzDfJE6SRMC+B/4SIJJyp0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=r75j1oTmrYnrP/ugPnHC8BYZBdC6mDZd+XbCGlhDWXLxdXiBhVQRAUcgqw0iW/wI1 XW9+PvpL2qI1PcVGWovg1MDrQP7TV1aZz5XJGp8QGJnQ//7U0Fv7NraWhNiGLxSP8t i8ojOQ1l/ZeBxTcuGvsfHjIGvEAAvI89ftxfPeHs= Date: Fri, 11 Jan 2019 07:25:56 +0100 From: Greg KH To: Suren Baghdasaryan Cc: tj@kernel.org, lizefan@huawei.com, hannes@cmpxchg.org, axboe@kernel.dk, dennis@kernel.org, dennisszhou@gmail.com, mingo@redhat.com, peterz@infradead.org, akpm@linux-foundation.org, corbet@lwn.net, cgroups@vger.kernel.org, linux-mm@kvack.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@android.com Subject: Re: [PATCH v2 1/5] fs: kernfs: add poll file operation Message-ID: <20190111062556.GA348@kroah.com> References: <20190110220718.261134-1-surenb@google.com> <20190110220718.261134-2-surenb@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190110220718.261134-2-surenb@google.com> User-Agent: Mutt/1.11.2 (2019-01-07) Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org On Thu, Jan 10, 2019 at 02:07:14PM -0800, Suren Baghdasaryan wrote: > From: Johannes Weiner > > Kernfs has a standardized poll/notification mechanism for waking all > pollers on all fds when a filesystem node changes. To allow polling > for custom events, add a .poll callback that can override the default. > > This is in preparation for pollable cgroup pressure files which have > per-fd trigger configurations. > > Signed-off-by: Johannes Weiner > Signed-off-by: Suren Baghdasaryan Reviewed-by: Greg Kroah-Hartman