From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp11.migadu.com ([2001:41d0:2:bcc0::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms5.migadu.com with LMTPS id IJdgKQKbmWMzQgEAbAwnHQ (envelope-from ) for ; Wed, 14 Dec 2022 10:44:34 +0100 Received: from aspmx1.migadu.com ([2001:41d0:2:bcc0::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp11.migadu.com with LMTPS id mNBoKQKbmWMXPgAA9RJhRA (envelope-from ) for ; Wed, 14 Dec 2022 10:44:34 +0100 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by aspmx1.migadu.com (Postfix) with ESMTPS id 45794ECD2 for ; Wed, 14 Dec 2022 10:44:34 +0100 (CET) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1p5OIu-0004wA-Qk; Wed, 14 Dec 2022 04:43:57 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1p5OIs-0004vP-Ck for guix-devel@gnu.org; Wed, 14 Dec 2022 04:43:54 -0500 Received: from lev.selidor.net ([66.246.138.156]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1p5OIq-000052-Cv for guix-devel@gnu.org; Wed, 14 Dec 2022 04:43:54 -0500 Received: from sax (unknown [91.207.57.115]) by lev.selidor.net (Postfix) with ESMTPSA id 27C22CADD; Wed, 14 Dec 2022 09:43:49 +0000 (UTC) Date: Wed, 14 Dec 2022 10:43:46 +0100 From: Ivan Vilata i Balaguer To: Ivan Vilata i Balaguer Cc: Mekeor Melire , guix-devel@gnu.org, Tobias Geerinckx-Rice Subject: Re: Status of hibernation (suspend to disk) in Guix Message-ID: References: <87wn79wnfj.fsf@nckx> <87bkockw84.fsf@posteo.de> <87lengoymq.fsf@posteo.de> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="D7sBq+4tXIuSc7+t" Content-Disposition: inline In-Reply-To: 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wbFFnErLaEXEVLlb2wVFcljDGFg Received-SPF: pass client-ip=66.246.138.156; envelope-from=ivan@selidor.net; helo=lev.selidor.net X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: guix-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: guix-devel-bounces+larch=yhetil.org@gnu.org X-Migadu-Country: US X-Migadu-Flow: FLOW_IN ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=yhetil.org; s=key1; t=1671011074; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:in-reply-to:in-reply-to: references:references:list-id:list-help:list-unsubscribe: list-subscribe:list-post:autocrypt:autocrypt; bh=ooOkC/Dkflo8AowiNrdD82P9rbafJ4d4QaOVPgadb1E=; b=DlkmaI6JOZ6cOB0PBcrnrJoVJrGZ9c4fQyT24Wv/354+wO0T91boExgM3CTHvwyAOBhlwi xQOq5Hz+BAOoZcCXwBxTlhwm6Jvy1xB8eR7sMS7Fl0s6DDHdukBjxcCCB6mesgwsYT/vFd S2CR6XbT+hoIwu8czrj1GN5rsZdssXyamZ4ecV5FSNsITx/NqccHjWcp80qotH8hEj5zoA OZaTnmrEAaFVDjL2VfJITIoUseZN08IPyCTAN0JuNoL5ds12YbHiS8lgbGgFpOs6jOXRlI qTMGLwWT2TJFLIt7sXBtRWKsrV9HDE2LsjDiEjv94abgHLSWUTy4ytsZ/4FUqA== ARC-Authentication-Results: i=1; aspmx1.migadu.com; dkim=none; spf=pass (aspmx1.migadu.com: domain of "guix-devel-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="guix-devel-bounces+larch=yhetil.org@gnu.org"; dmarc=none ARC-Seal: i=1; s=key1; d=yhetil.org; t=1671011074; a=rsa-sha256; cv=none; b=l5z+CtaSlVbnd7riLk0IBVB4rCYNajRoKw/l+xYl7bCaZb06PUhHkJOcwrTM+hKw2BnCAG B4NEURPDkcPbW6Nw9NCnC5ykNzzbcbOHwMSkDX8ySBpPr8tl/rOR2+URORU86lh6qVw+bI ng3Hbd7YU59p52oH37VWUvyQR3XdzYDjjdG97SZ0U9FmI0PoHgj3tP3VgPKdCidJUXXqjd P4NlP/HkLrqZszJLcTjoqc5niLOkt1dqMj7HPHxYGs0aQuIEV4XvmFAhYSNq/O8ezCgv/t FpneABkNs8CuaSoMOVGLqWVmG/ejjh7DM0iuKYo7nDtUxHehsXrNsPqNWA+/XQ== X-Migadu-Spam-Score: -3.17 X-Spam-Score: -3.17 X-Migadu-Queue-Id: 45794ECD2 X-Migadu-Scanner: scn0.migadu.com Authentication-Results: aspmx1.migadu.com; dkim=none; spf=pass (aspmx1.migadu.com: domain of "guix-devel-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="guix-devel-bounces+larch=yhetil.org@gnu.org"; dmarc=none X-TUID: tcRCWEYVan/M --D7sBq+4tXIuSc7+t Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Ivan Vilata i Balaguer (2022-12-12 21:11:53 +0100) wrote: > Mekeor Melire (2022-12-10 01:00:24 +0000) wrote: >=20 > > > What about the "filefrag" executable from the "e2fsprogs" package. > > > According to this article, it can be used in place of the deprecated > > > uswsusp suite: > > > > > > https://www.linuxuprising.com/2021/08/how-to-enable-hibernation-on-ub= untu.html >=20 > Good find! Besides the issue of `filefrag` being ExtFS-specific, another > thing that worries me is [this check][1] that `swap-offset` does about the > swap header being physically contiguous on disk, which would need to be m= ade > manually with `filefrag`. >=20 > [1]: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-utils= =2Egit/tree/swap-offset.c#n114 I had a quick look to the [source code of mkswap][1] and it does take care = of checking whether the swap file has holes in it (look for the word "hole"). = If it has, it prints a warning (but it continues). For instance: ``` $ dd if=3D/dev/zero of=3Dswap bs=3D512 count=3D1 seek=3D1000 1+0 records in 1+0 records out 512 bytes copied, 0.000234313 s, 2.2 MB/s $ mkswap swap mkswap: swap contains holes or other unsupported extents. This swap file can be rejected by kernel on swap activation! Use --verbose for more details. Setting up swapspace version 1, size =3D 496 KiB (507904 bytes) no label, UUID=3D3c5920cb-04ee-4713-8008-c2c1bebc2f6f ``` [1]: https://github.com/util-linux/util-linux/blob/master/disk-utils/mkswap= =2Ec Since it's unlikely that the file will change its block arrangement on disk, and enlarging it requires another invocation of `mkswap`, it's probably eno= ugh to tell the user to check for such warnings on `mkswap` invocation (in sect= ion "(guix)Keyboard Layout, Networking, and Partitioning"), and then instructing them to use `filefrag` in "(guix)Swap Space" should be ok. I can work on an additional patch for that, but I can't ensure that it'll be ready before 1.4.0 (I'm not in the dev team, so I don't know what the plann= ing for the release is=C2=A0=F0=9F=98=89). Cheers! --=20 Ivan Vilata i Balaguer -- https://elvil.net/ --D7sBq+4tXIuSc7+t Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEHpvwBPZcchIQr6TuPezBBfXdI4IFAmOZmtIACgkQPezBBfXd I4LlfRAAxzJ4i4AyvocF+b7aGwMYdSRzWaDsO8cEVvFsxCjhKaK/m7tNJsNTxd/d nE3gcp8nQsMWeU62JRD8XD40ezjprb57Ol8y1gIpjhm4oYRdyfsUmmCQX9P7Re71 RhjU3xIUBmliRaLlIr5FAUnGgUuSSBMOqr3yFnTU0q50ogPRagGvw0pLygHC2vkC Kf+ou5AiQeKeFMMve6lDLK8YY+VxO5zlOgwghfoQXjzwvVzEWqDmegGf2ktxeVhU um2PVU/By24fl/Qm62AP7GZdwxHU8Hrpe0HX4bZXjWjHtOJrVszuj+Blm4IjS/UC vt3OJrMbYsP6GxbsjQ62EU7KyrClR2o0i4/lK3tneXjhS5v2fbtOmDZfbA1DRBRc nGR3Ql0M6c4VkEbmMgtDiMZrxNG94RGP/DNUYxZXwVXYHeL8vqRv0Cii9KBSE4uD hErx/80mlaxllxB28O8k/sbIeEKr7VLqLt+mSyii8AcYG5eUMiHw70PPC+i9YB1T Z8/8L52m+KED/E35ab9vmTqsACsfMqBCKMa27SJxv9VgsDgie/5infKhEdBZRh0V owZ39ZlYUeye5d9GZrlCnYaV/10JXhjtdNj7z2hh12LQfpn+LDtIB0GmBaV2chJj S3EYoTPvbsRvHs7FBtrQPxFwtGkOd7m3bVtsgeR91dUbBaJebzI= =nygW -----END PGP SIGNATURE----- --D7sBq+4tXIuSc7+t--