From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lamorak.hansenpartnership.com (lamorak.hansenpartnership.com [198.37.111.173]) (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 642591DFE12; Wed, 26 Mar 2025 12:27:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.37.111.173 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742992047; cv=none; b=AyOUv6II6N1Z3E/piBPRFaJD/7mq0QK8YVkNpHw0mobq4KRfZ6TbEdghD2qn6aPcssRoFtnmuO2e1Utz8LOALWBFbYazgjw6CruAxu1TGhgdRqNkOSLeVh54qYLYSKi/kia5+/IUwHRm4smDsaurNljDoRh0wf4fvIX7vSt90I0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742992047; c=relaxed/simple; bh=K7LYciy0njGYlRtqVSs1L811QXg0vGMzPABvgHJJ5QM=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=t5ln2/zB4I2UC/FoSTE+Zw41pRPEZEKzdhdYORWjypaFUDRO7CqXf06dtpdoCPfOHdouuLDvXtpIyTlQmSQr9VBzbvzCh8eG4svzVhqYxM8PR+v1VKUtITJ0hTSi5TkY7cJnc8gTMTHox1lMu9dqg9sAmHBgkGCsj9owkbave9o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=HansenPartnership.com; spf=pass smtp.mailfrom=HansenPartnership.com; dkim=pass (1024-bit key) header.d=hansenpartnership.com header.i=@hansenpartnership.com header.b=pJOX4dnr; arc=none smtp.client-ip=198.37.111.173 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=HansenPartnership.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=HansenPartnership.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=hansenpartnership.com header.i=@hansenpartnership.com header.b="pJOX4dnr" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=hansenpartnership.com; s=20151216; t=1742992044; bh=K7LYciy0njGYlRtqVSs1L811QXg0vGMzPABvgHJJ5QM=; h=Message-ID:Subject:From:To:Date:In-Reply-To:References:From; b=pJOX4dnrUDWErnQGMQ+gcJPyxF59rqbxjSj4M9Bza6ca/Ky5DYHJKfnhW0Xw3cihE o4P/ShQo23cOoiXIa1dzD5N794Qo9uzuIqkfyv9BW97xF6iOBnmnN4ZHng2ygND7lN IBiSGnAR2l8cjPuPah/qTkIO+NMzFzHfH2Qz6Ros= Received: from [172.20.0.78] (unknown [99.209.85.25]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lamorak.hansenpartnership.com (Postfix) with ESMTPSA id C6EEC1C02ED; Wed, 26 Mar 2025 08:27:23 -0400 (EDT) Message-ID: <772a21b721e21422407dbabcbf73bb0adf594d63.camel@HansenPartnership.com> Subject: Re: [RFC 0/6] fs: automatic kernel fs freeze / thaw From: James Bottomley To: Luis Chamberlain , jack@suse.cz, hch@infradead.org, david@fromorbit.com, rafael@kernel.org, djwong@kernel.org, pavel@kernel.org, song@kernel.org Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, gost.dev@samsung.com, amir73il@gmail.com Date: Wed, 26 Mar 2025 08:27:23 -0400 In-Reply-To: References: <20250326112220.1988619-1-mcgrof@kernel.org> Autocrypt: addr=James.Bottomley@HansenPartnership.com; prefer-encrypt=mutual; keydata=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 8mT2Eh9SkH+YVOmaKsajgZgrBxA7fWmGoxXswEVxJIFj3vW7yNc0C5HaUdYa5iGOMs4kg2ht4s7yy7NRQuh7BifWjo6BQ6k4S1H+6axZucxhSV1L6zN9d+lr3Xo/vy1unzA== Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.3 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Wed, 2025-03-26 at 04:42 -0700, Luis Chamberlain wrote: > On Wed, Mar 26, 2025 at 04:22:14AM -0700, Luis Chamberlain wrote: > > I did a quick boot test with this on my laptop and suspend doesn't > > work, its not clear if this was an artifact of me trying this on > > linux-next or what, I can try without my patches on next to see if > > next actually suspends without them. And so, we gotta figure out if > > there's something stupid still to fix, or something broken with > > these changes I overlooked on the rebase. >=20 > next-20250321 has suspend broken, so it was not my patches which > broke suspend. So we need baseline first on a kernel revision where > it is not broken. I wrote a much lighter weight version of this and tested it on 6.14 (or actually 6.14-rc6 since my laptop takes ages to do a full kernel compile), which is where I found the sb_write_started() deadlock Jan predicted. But with that fixed, at least hibernate works for me using an ext4 based image, so if you use 6.14 as your base, it should work for you. Regards, James