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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BFDB3FD4F31 for ; Tue, 10 Mar 2026 19:48:04 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 025BB6B0088; Tue, 10 Mar 2026 15:48:04 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id EE7D66B0089; Tue, 10 Mar 2026 15:48:03 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id DE6CD6B008A; Tue, 10 Mar 2026 15:48:03 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id BE4D26B0088 for ; Tue, 10 Mar 2026 15:48:03 -0400 (EDT) Received: from smtpin05.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id 517F21398B3 for ; Tue, 10 Mar 2026 19:48:03 +0000 (UTC) X-FDA: 84531189246.05.84A5986 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf07.hostedemail.com (Postfix) with ESMTP id 9814F40007 for ; Tue, 10 Mar 2026 19:48:01 +0000 (UTC) Authentication-Results: imf07.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=pQIKf2zO; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf07.hostedemail.com: domain of tj@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=tj@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1773172081; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=sDyNoQ3Umt4VC41nVkZFBBjnPbJ5RSyXwJTMYWBLsw0=; b=oDrfY0uxl3bJxfkDSBPKEgGPAIt2yjEZNcrTM1iVI/Y/UblkbChG+ykPjbawmWIe82E9/M 6hidlNA7Yd4XOWIWJzxjs3d12PizKkM8GGthj0Auq/lVeRx3mb3BJ8EGbjBH+08pdjys6+ iyiuzV70+wS17kJsHr2OuSSKFwz76vs= ARC-Authentication-Results: i=1; imf07.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=pQIKf2zO; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf07.hostedemail.com: domain of tj@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=tj@kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1773172081; a=rsa-sha256; cv=none; b=hsK15BZW2WREYfwxnPmJuc3vXnEO1nNAsHs1ye3fzGXWQT0Mg/8tV4WbtytX24+nSg13Ku 8pu5a4pb/KpoeOgpgjbmXi4agH3tnHO9428f4ksDtnnQHOBkS6xu2gpDpETvsxQDM5UNw2 3y0yXMgCQK5TAA8P3AFHjf6NA4u+yu4= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 686FC43401; Tue, 10 Mar 2026 19:48:00 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 216FCC19423; Tue, 10 Mar 2026 19:48:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773172080; bh=6T6jaUZt2ffF7BsGgmsx15Xkc6EQsgSDxh0SiVnLI4U=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=pQIKf2zO+VQwtji2K+41IbalY0n57Ers3wp0AU86A+g3QoHyrNMQyrnucruLgj/IO oXW0ytWiIDHxkMctz9TsogDqYivDm8dDt7ZTvmLRj4IZ/ajVB3ahHlIRHBTcI9jN7c uJ+RP3xVlfXB1l3EEQq/2SX89dOe+G4+ocZHByrGaSkp3L2Wd3nyuTKIn8CDWHSVlD fpuXQwjD/IlUDwBBuJA27VEON3ACdhjkM9ojRdE99Lm2bFYcYoyjcPeUbn2W2gXT3O M6VPkGlXgod9v1uabYJjXm+JOrVsEg2qpm7Fjfy0d5VjtHjOdasfBazJmEWJXpivii Rixwf4N1h/+Sg== Date: Tue, 10 Mar 2026 09:47:59 -1000 From: Tejun Heo To: Ben Greear Cc: Johannes Berg , linux-wireless , Miriam Rachel , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: 6.18.13 iwlwifi deadlock allocating cma while work-item is active. Message-ID: References: <35779061f94c2a55bb58dcd619ae91c618509cf4.camel@sipsolutions.net> <3303d57a4ea6776dbc66ca72441023f76e6f1234.camel@sipsolutions.net> <35a7ebcf-862f-0b3a-a245-c32196a58692@candelatech.com> <68c1ca1381d1871fff72b211890a64eb@kernel.org> <5b9b93df8774810a43fceb359906604b@kernel.org> <729164a1-9dd4-c9a4-f092-d93d775257e0@candelatech.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <729164a1-9dd4-c9a4-f092-d93d775257e0@candelatech.com> X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 9814F40007 X-Stat-Signature: 7qmsfwzgbdbkt9ou6boumtwtd4x6q9hm X-Rspam-User: X-HE-Tag: 1773172081-667764 X-HE-Meta: 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 yjIbc1ea 7i8AtyHMbcHrKq7YPyHLBONB789UeOwV3cG3tD1KAHIVSaDAf8KvlXeff3B5oLhLtqh9W7oUVje+g2xQdWK6wm5YW+YeTtBXOtw1rdJNU62bQiytEEGpnho7iXSFJas4oWbXY5cv2gDg4l5VCFiRvw/q38sr9ijIuPMFoeqP37vOt2ohUb86V4VErz1RWF8F1j8kMkjEKFD6WRCQBm6GwSEDCXg== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello, On Tue, Mar 10, 2026 at 12:18:49PM -0700, Ben Greear wrote: ... > But could this work-item (re)initialization also explain work-queue system going > weird? Just using kthreads, which 'fixes' the problem for me, > really shouldn't make a difference to the code below, so probably > it is not related? Oh, re-initing can deifnitely corrupt things. Workqueue shares work list across all work items sharing the pool, so the blast radius can be bigger. ie. It'd be *possible* for kthread_worker to get lucky. Thanks. -- tejun