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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 90516C433DF for ; Tue, 9 Jun 2020 11:39:46 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 151A22064C for ; Tue, 9 Jun 2020 11:39:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="m8l36wAA" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 151A22064C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id B3FD01695; Tue, 9 Jun 2020 13:38:54 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz B3FD01695 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1591702784; bh=YdV7FUOgFE6UG4AC5JeEwOCvKPKEMjMyvkocDGiRSls=; h=Date:From:To:Subject:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=m8l36wAAV/ytARsa7yXSwzJ5OauUd2CnLPDzDhxDkcH9eLcJ/56Szbj1+bmw8GXzm I8HHssvX17xZZnZli5Qppoh0Lcu1lXSaVbd/Wgjh79rUCIjaZ9yDDi+umYb5oRTpMr LV7a1jYBkTCOqdonZhEPakzgqyMACk8SdzoYQVoY= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 1E7FAF80278; Tue, 9 Jun 2020 13:38:54 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id DE57BF8028C; Tue, 9 Jun 2020 13:38:51 +0200 (CEST) Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 4D3E6F80124 for ; Tue, 9 Jun 2020 13:38:48 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 4D3E6F80124 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 03D30ABCE; Tue, 9 Jun 2020 11:38:50 +0000 (UTC) Date: Tue, 09 Jun 2020 13:38:46 +0200 Message-ID: From: Takashi Iwai To: Christoph Hellwig Subject: Re: next-0519 on thinkpad x60: sound related? window manager crash In-Reply-To: <20200609113123.GA547@lst.de> References: <1591545088.74ii116nf2.none@localhost> <20200608061950.GA17476@lst.de> <1591624340.z01ejtod28.none@localhost> <20200609054306.GA9606@lst.de> <20200609084305.GA21671@lst.de> <20200609091727.GA23814@lst.de> <20200609113123.GA547@lst.de> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI/1.14.6 (Maruoka) FLIM/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL/10.8 Emacs/25.3 (x86_64-suse-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=US-ASCII Cc: alsa-devel@alsa-project.org, x86@kernel.org, David Rientjes , tiwai@suse.com, linux-kernel@vger.kernel.org, "Alex Xu \(Hello71\)" , hch@infradead.org, mingo@redhat.com, bp@alien8.de, Pavel Machek , hpa@zytor.com, tglx@linutronix.de X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" On Tue, 09 Jun 2020 13:31:23 +0200, Christoph Hellwig wrote: > > On Tue, Jun 09, 2020 at 11:31:20AM +0200, Takashi Iwai wrote: > > > > How would be a proper way to get the virtually mapped SG-buffer pages > > > > with coherent memory? (Also allowing user-space mmap, too) > > > > > > dma_mmap_coherent / dma_mmap_attrs for userspace. We don't really > > > have a good way for kernel space mappings. > > > > And that's the missing piece right now... :-< > > Can you point me to the relevant places (allocation and vmap mostly) > so that I can take a look at how to fix this mess? Found in sound/core/sgbuf.c. It's specific to x86. Also, for V4L, drivers/media/v4l2-core/videobuf-dma-sg.c. thanks, Takashi