From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 39C303033DE for ; Mon, 15 Jun 2026 18:27:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781548074; cv=none; b=X58uFUQlxbBM+fHSEhl23GDCZT1EgkX7FGqKygYJHvfH22Uw2PNhOD2UDlXQP3KPGAyMg+ZaXZVUqA0C6Z2kTZVD1Igw7Hwf/XjpwPRDek4b3uSRMPuOeTVi9kj2evgJSGszjRslzlXS07Xv+4Y4zzb+kv5HdzylHREbCXLN+bc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781548074; c=relaxed/simple; bh=hg39j0DgP230f5Mq6ssMSNWpkE5/4EX8IztW7ppP3xo=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=ShU88JRJ4jc6TM5GPgKondWJtETOPP+OLTMH2rhWO+whDD9fmyvoPqTG8h9DvcP4hqGNacDPfWSFsXfuOWiedRXFZY51dNhG5qyAmDhsT4IS72HkUtg6yGDikPnaFqT1opSsOXucDYSs78hbd0s0zsDBMLi4hRUbI68K+A6sGZo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=dT9bk6S5; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="dT9bk6S5" Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 94C7F169E; Mon, 15 Jun 2026 11:27:47 -0700 (PDT) Received: from arm.com (usa-sjc-mx-foss1.foss.arm.com [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id DB7A33F905; Mon, 15 Jun 2026 11:27:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1781548072; bh=hg39j0DgP230f5Mq6ssMSNWpkE5/4EX8IztW7ppP3xo=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=dT9bk6S5wzxhxjZeiNaCILM9xWFZWrX3wAQELqDNF54qlKZXNloVozHnD0VUbXJxt GeeZjN5R+BqBn54GDL6xFmHk227Qj6/AldIup/T4TylqZq9CN6jy3kC2GS2sCIp2It l4wN46zCsyWHDay1GaQl0dF0q58rEQ1n/amAcvIc= Date: Mon, 15 Jun 2026 19:27:48 +0100 From: Catalin Marinas To: Breno Leitao Cc: Andrew Morton , lance.yang@linux.dev, Davidlohr Bueso , Oleg Nesterov , sj@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, kernel-team@meta.com Subject: Re: [PATCH v3 3/3] mm/kmemleak: stop the per-cpu and struct page scans early too Message-ID: References: <20260615-kmemleak-stack-resched-v3-0-acecd7d7fd92@debian.org> <20260615-kmemleak-stack-resched-v3-3-acecd7d7fd92@debian.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260615-kmemleak-stack-resched-v3-3-acecd7d7fd92@debian.org> On Mon, Jun 15, 2026 at 10:49:08AM -0700, Breno Leitao wrote: > The per-cpu and struct page scan loops have no reschedule-stop check of > their own: once a scan is interrupted they keep calling scan_block() for > every remaining block, which scans nothing useful. > > Propagate scan_block()'s interrupted status through scan_large_block() > and break both loops as soon as it is set. > > Suggested-by: Catalin Marinas > Signed-off-by: Breno Leitao Reviewed-by: Catalin Marinas