From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 774AD255F27; Tue, 9 Sep 2025 03:51:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757389905; cv=none; b=Cz/S9K2NbyEWBs976eTj8nF3hy+FSMOo9ynw3OVsD7wZzbD4eEAEKhWozeUKEIPZHuwAFLkqfRHH+F4fAGnCZjOX7t6tZjAxwH0rcTk0hQIFL3iBfL99+35RJRXVjrRTA4pLAd3+xvHWwESJzm5898h4XTVaMJ7FEbnhzBRUusQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757389905; c=relaxed/simple; bh=hDFSqIoDGm+oeOAZ9q443ZWBkCIE3hQkRhHMZyq47fQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Q3sIqudagcJbYvIO2Sco37fHqiZ5Nrdc1GgRrxpzTdOu2myJP2R5GPEfKoagffIggrWkpLZKqFKMWCBZz8IgOAufkKznu5YS496H4H2TDnIRaXZVjzRMc09uyS3aF/Mk+D1Unv47qTDeflxw07yvv8VJIoyzWgzeeeLayTZuc1A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=eBxgxzOE; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="eBxgxzOE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E6069C4CEF4; Tue, 9 Sep 2025 03:51:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1757389905; bh=hDFSqIoDGm+oeOAZ9q443ZWBkCIE3hQkRhHMZyq47fQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eBxgxzOEa8Ac6u4NfIJZg7uvYs9srT6Cy6snFEvxalwi+d2+6suPkVf9VfqXgfDcc JlcT0Q2YpAFnYky/zbHUDTmhp4KPF5M/taeWvmOUGamiJuPnnxVp7A7ydYwx6Ze8Z3 BFTHiDwU/RdL3NfWk9uT3DMra1l/NgC50To6cwWVdqfyEO+jEwKlSEIsZvz7qvo7PR +P+WMi8LelFiKdOv04IW/kXl50UZsCYPBmiTg+jaKTruDc4//pRE6p6OZ0aoTz1eky K+xL55w8cQw6Pvkk95z9e69KgSjNLDJEWHMcRI1opEaT5utpHCwFqL/biZlW8AeBlz HCctCpmAXk01Q== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , "# 6 . 17-rc1" , damon@lists.linux.dev, kernel-team@meta.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 0/3] samples/damon: fix boot time enable handling fixup merge mistakes Date: Mon, 8 Sep 2025 20:51:41 -0700 Message-Id: <20250909035141.7545-1-sj@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250908193548.a153ef39d85cc54816950f71@linux-foundation.org> References: Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On Mon, 8 Sep 2025 19:35:48 -0700 Andrew Morton wrote: > On Mon, 8 Sep 2025 19:22:35 -0700 SeongJae Park wrote: > > > First three patches of the patch series "mm/damon: fix misc bugs in > > DAMON modules" [1] was trying to fix boot time DAMON sample modules > > enabling issues by avoiding starting DAMON before the module > > initialization phase. However, probably by a mistake during a merge, > > only half of the change is merged, and the part for avoiding the > > starting of DAMON before the module initialized is missed. So the > > problem is not solved. Fix those. > > > > Note that the broken commits are merged into 6.17-rc1, but also > > backported to relevant stable kernels. So this series also need to be > > merged into the stable kernels. Hence Cc-ing stable@. > > That's unfortunate, but the about doesn't actually tell us what this > series does. Good point. The issue is that the sample modules can crash if those are enabled at boot time before DAMON is initialized, via kernel command line. Would you prefer me sending another version of this patch series with an elaborated cover letter? > > > [1] https://lore.kernel.org/20250706193207.39810-1-sj@kernel.org > > Presumably it's in there somewhere? You're right. Both the cover letter and the individual fix patches (first three of the series) describes the issue and origin broken commit. Please let me know if there is anything I can help for this patch series from my side :) Thanks, SJ