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=-2.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT 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 0E02CC43381 for ; Sat, 30 Mar 2019 18:36:51 +0000 (UTC) Received: from shelob.surriel.com (shelob.surriel.com [96.67.55.147]) (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 A70C62082C for ; Sat, 30 Mar 2019 18:36:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=kroah.com header.i=@kroah.com header.b="rCnlElI2"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=messagingengine.com header.i=@messagingengine.com header.b="A2/FSi+h" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A70C62082C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kroah.com Authentication-Results: mail.kernel.org; spf=fail smtp.mailfrom=kernelnewbies-bounces@kernelnewbies.org Received: from localhost ([::1] helo=shelob.surriel.com) by shelob.surriel.com with esmtp (Exim 4.91) (envelope-from ) id 1hAIpu-0003Qk-IR; Sat, 30 Mar 2019 14:36:10 -0400 Received: from out4-smtp.messagingengine.com ([66.111.4.28]) by shelob.surriel.com with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91) (envelope-from ) id 1hAIps-0003Qe-Nz for kernelnewbies@kernelnewbies.org; Sat, 30 Mar 2019 14:36:09 -0400 Received: from compute6.internal (compute6.nyi.internal [10.202.2.46]) by mailout.nyi.internal (Postfix) with ESMTP id 3FF5E210EC; Sat, 30 Mar 2019 14:36:06 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute6.internal (MEProxy); Sat, 30 Mar 2019 14:36:06 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kroah.com; h= date:from:to:cc:subject:message-id:references:mime-version :content-type:in-reply-to; s=fm3; bh=mK46uuelAyv7HFPEi2IAdvxano9 ePRaA1ooTopgUU3c=; b=rCnlElI22LgDM5Cc0rpNHDYvz9N1NetYfiWGvi0d8ii DiDFbatYsS4SnLFjrmc7q6gdR5e0PFB22Xy06DTLCu/6Sj/T6PZyA1TIWjU0nGDp +pZAxLNax+2DqswarUyfmy/tGn3uozlmYY72ZLvkBAplhucbiSHLZN898ZKNkpma n8eHOJ7Su93YlaFt8XFU6jZLvCmIiwmCRDANuh0PBb6Rxq90BIDEMlSRNhK8e8Zx AKuAjQAU3fCHrLtaxZM2MrG4oAezC7TXjynmQb1rQb6FpFBzJFptSoGKGgX3OpYL wiOOvXoEwikcHk8J5L7sdXXLHPvfsEKJrKkIHjS6YTw== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to:x-me-proxy :x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm2; bh=mK46uu elAyv7HFPEi2IAdvxano9ePRaA1ooTopgUU3c=; b=A2/FSi+hjOxJ592BEItVfn BMmsK0r0NinhZBhg7J3oY1jDsnmB1gXHZlRSzFGwVp0z1c71zuLcSZgrwecOLiHq TX2MvF1Dpp/5LhjE8Tc8ipPhpg6tocD4FXiNIsnCaYXLCTLFSneOPX5HBI1f36xx 5CbHUrFEz1o5WNL0dHUFsoEDzk0KlIZm9+t1bvRhtTk8qI4Y0OswcjV3lPgElIvU xRquv3x5hiIH3OUpZM9ZAUn4TqRlctjljs6Wl2I17VhEC0EWeIUJcLNsqBQ6k7ct cxpAYueoMWsLZD1wmnUac9b25ozY2Hr0zGC+9/OuVoKN5Z7FW+dohvvwEtgUG4OA == X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedutddrkeelgdduudehucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhepfffhvffukfhfgggtuggjfgesthdtredttdervdenucfhrhhomhepifhrvghg ucfmjfcuoehgrhgvgheskhhrohgrhhdrtghomheqnecukfhppeeivddrudduledrudeiie drleenucfrrghrrghmpehmrghilhhfrhhomhepghhrvghgsehkrhhorghhrdgtohhmnecu vehluhhsthgvrhfuihiivgeptd X-ME-Proxy: Received: from localhost (unknown [62.119.166.9]) by mail.messagingengine.com (Postfix) with ESMTPA id B7AA0E415C; Sat, 30 Mar 2019 14:36:04 -0400 (EDT) Date: Sat, 30 Mar 2019 19:35:59 +0100 From: Greg KH To: Ruben Safir Subject: Re: Unexpected scheduling with mutexes Message-ID: <20190330183559.GA21828@kroah.com> References: <20190329200158.GF12004@kroah.com> <0f14b4fd-af65-2903-c692-1ba485c6a852@mrbrklyn.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <0f14b4fd-af65-2903-c692-1ba485c6a852@mrbrklyn.com> User-Agent: Mutt/1.11.4 (2019-03-13) Cc: kernelnewbies@kernelnewbies.org X-BeenThere: kernelnewbies@kernelnewbies.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Learn about the Linux kernel List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kernelnewbies-bounces@kernelnewbies.org On Sat, Mar 30, 2019 at 08:25:57AM -0400, Ruben Safir wrote: > On 3/29/19 4:01 PM, Greg KH wrote: > > As an example of this, serial ports are not "exclusively owned", right? > > > they are not? What handles the interupt? Context is everything, and you cut out all of it here :( The kernel handles the interrupt of course, the sentence was referring to userspace interacting with the kernel, not anything else. greg k- _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies