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 7E6253081D6 for ; Thu, 26 Mar 2026 02:22:15 +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=1774491735; cv=none; b=tVdiB1rlz7UNimdg0nJ2KYkBjHjV3v5+M2wFWkixtnZwxo/72UqqEHUKTgLuW9fs69EiFPCmkeuRZOdOx0j9n4hlKAcXgtvgC6c2j1LKQZIi+PjqvzZ0jp/PQsyZ4HEl7423ioKg99esg6zgnCCHjEPjegZbtYJxbwKS11cywA4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774491735; c=relaxed/simple; bh=NImn/FDtSezZ+Z4YLtokf2xod7fZNrpjBFHFR2Ms/do=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=CHHXE4e6GVEyloRKNR3cSSHlU7fE8CrPTqBzC+QmYpz3TRPGuBexGACBOBPWizO7yHcVFm2y+Ul5Uqob3BBHFW98ryHlCthxJRT6lAXepzoypl2m1PO/8D18o7Irt6qBsJgOIwvwsXk+u0a0Y2ghsZiCjMRqiE7Hncwr++a0fCs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LNjuwAjE; 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="LNjuwAjE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F19C8C4CEF7; Thu, 26 Mar 2026 02:22:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774491735; bh=NImn/FDtSezZ+Z4YLtokf2xod7fZNrpjBFHFR2Ms/do=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=LNjuwAjEaTRCcPaIS8I/LhbvayhqX7HdPwTpOQoLLieBegp01H36aWzB35aB6H1cQ 2Je2m56gGmpV3cNi8VIaRJG8lOHvlnmJ18aNBxlrvRzx9OtnDWGL3BC9KzkH82mDjd 2kwQN6hFxAilAwHhE7xuFcTSesMvz7Y/RrmmP5TkQpfULkNMZeKAh4MIDPRAgUrM5h GefN283GvdGNVhFegnr+nnkWbe2clc7sZ6GDXo9LNOi6sW7bKG4uYLStBAAWtyIIJM ql78gmtF8qQYMOjcwkmaHhM4gwt2+j9/F0K9XsBRSPkmeFMZHoGWA911LgTiaT3ioB 4I89LwKFhfaWA== Date: Wed, 25 Mar 2026 19:22:14 -0700 From: Jakub Kicinski To: Tetsuo Handa Cc: Network Development Subject: Re: Can networking trees carry temporary patches? Message-ID: <20260325192214.133ffaaf@kernel.org> In-Reply-To: References: Precedence: bulk X-Mailing-List: netdev@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 Tue, 24 Mar 2026 19:55:18 +0900 Tetsuo Handa wrote: > I was carrying debug printk() patches [1][2] in linux-next tree via my tree > in order to debug "unregister_netdevice: waiting for DEV to become free" > problem [3]. > > While these patches had been a lot helpful, now that easily reproducible cases > has been fixed, this problem is hardly reproduced in linux-next tree recently; > giving me no hints for debugging remaining cases. However, this problem is still > reproduced in networking trees. > > Therefore, I appreciate if networking trees can carry temporary patches > (patches which are not intended to be merged into the linux.git tree). > > [1] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit?id=58b4f8f612187b0d9583b5549044734ecd7071eb > [2] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit?id=02fb7fbf5db47bf5c1736b692888232f5f6bf80e > [3] https://syzkaller.appspot.com/bug?extid=881d65229ca4f9ae8c84 Have you see netdev_hold() / netdev_put() ?