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 85B5627467F for ; Fri, 27 Mar 2026 01:34:21 +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=1774575261; cv=none; b=kjlGjOrprjJ8Y/ExtqY/walRlgGQXILPo4LJQyyZhGlW/ZOefofDQOsJpW73LtOkWMnBNDIi2SWlppK6f41m9lp76w2K2EvOLOOGA7+wCxXbEKGdZK/yDNhlp/1R9qqcknpSzhZg+TARL+ClfO05TVyjCDsTHFspOBm61iU+PzQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774575261; c=relaxed/simple; bh=cprlYlXK7DOYpOoG+qevi/asVd+0Zmd1lgFmMSDCY1Q=; h=Date:From:To:Cc:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=gsX6L8np6gc7FO69trE82gbKTdfSi2L4zhguvWt9HS6KWZd9+coJuv4FUoLSfHuiZ0sm+XEJHJGyPO7F/tnSbChL4/OHq4FUXmxp+OmktNUgjn6zrncmUs2CsYzguelEo+psfZBpIhZJaqDFNYbklWNKEl5gfrueAzskvJRl5Tg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=2l9LWYsM; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="2l9LWYsM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EDBACC116C6; Fri, 27 Mar 2026 01:34:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1774575261; bh=cprlYlXK7DOYpOoG+qevi/asVd+0Zmd1lgFmMSDCY1Q=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=2l9LWYsMPhAkmIGVHfzX32IavfM6yyhhM7uNUO9HmHZbTAz9z9kWdJU0N7G88Rlgw XYcTnUUrIgmmbdvko6C+oRgaSsKsqmjRJqwmnBkeiXmDU0dsEp+nqaKw8wM/sRgJmu gEdyppNL0n7mq2OPJqejZzcrGvsCGeBZGyy5a+PI= Date: Thu, 26 Mar 2026 18:34:20 -0700 From: Andrew Morton To: Suren Baghdasaryan Cc: Hao Ge , Kent Overstreet , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] mm/alloc_tag: clear codetag for pages allocated before page_ext initialization Message-Id: <20260326183420.bbcbef02b8d2f3dedc4c4980@linux-foundation.org> In-Reply-To: References: <20260326140554.191996-1-hao.ge@linux.dev> <20260326181145.35b559956a45b0efdc9c0450@linux-foundation.org> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.33; x86_64-pc-linux-gnu) 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-Transfer-Encoding: 7bit On Thu, 26 Mar 2026 18:19:56 -0700 Suren Baghdasaryan wrote: > > > > Do people use CONFIG_MEM_ALLOC_PROFILING_DEBUG much? Is a backport > > really needed? > > IMO backport would be good. OK, thanks, I'll slap a cc:stable on it and keep it in the 7.1.rc1 queue. I added "This bug occurs when CONFIG_MEM_ALLOC_PROFILING_DEBUG=y." somewhere in the changelog but that's pretty lame and could be expanded upon in a respin. > > > > Either way, it seems that this isn't a very urgent issue so I'm > > inclined to add it to the 7.1-rc1 pile, perhaps with a cc:stable. > > > > Please all share your thoughts with me, thanks. > > I'm reviewing and testing the patch and there is a race and a couple > of smaller issues. I'll post a reply later today. Cool. I was going to keep it in there for mm-new testing (which is light). But I guess there isn't much value in this so I'll drop v2. Sashiko had a bunch of nags, but I think you're checking that routinely? https://sashiko.dev/#/patchset/20260326140554.191996-1-hao.ge%40linux.dev