From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 325C6C46464 for ; Mon, 13 Aug 2018 11:23:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E321121746 for ; Mon, 13 Aug 2018 11:23:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E321121746 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729555AbeHMOEy (ORCPT ); Mon, 13 Aug 2018 10:04:54 -0400 Received: from ozlabs.org ([203.11.71.1]:51401 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729353AbeHMOEv (ORCPT ); Mon, 13 Aug 2018 10:04:51 -0400 Received: by ozlabs.org (Postfix, from userid 1034) id 41ptd06Yfbz9sCX; Mon, 13 Aug 2018 21:23:00 +1000 (AEST) X-powerpc-patch-notification: thanks X-powerpc-patch-commit: ec97eaad1383ab2500fcf9a07ade6044fbcc67f5 In-Reply-To: <20180430145558.4308-12-npiggin@gmail.com> To: Nicholas Piggin , linuxppc-dev@lists.ozlabs.org From: Michael Ellerman Cc: Jiri Slaby , linux-kernel@vger.kernel.org, Nicholas Piggin , Greg Kroah-Hartman Subject: Re: [11/15] tty: hvc: hvc_poll break hv read loop Message-Id: <41ptd06Yfbz9sCX@ozlabs.org> Date: Mon, 13 Aug 2018 21:23:00 +1000 (AEST) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2018-04-30 at 14:55:54 UTC, Nicholas Piggin wrote: > Avoid looping with the spinlock held while there is read data > being returned from the hv driver. Instead note if the entire > size returned by tty_buffer_request_room was read, and request > another read poll. > > This limits the critical section lengths, and provides more > even service to other consoles in case there is a pathological > condition. > > Signed-off-by: Nicholas Piggin Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/ec97eaad1383ab2500fcf9a07ade60 cheers