From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp10.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 iH24D0GMl2MChAAAbAwnHQ (envelope-from ) for ; Mon, 12 Dec 2022 21:17:05 +0100 Received: from aspmx1.migadu.com ([2001:41d0:2:bcc0::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp10.migadu.com with LMTPS id 2PzzDkGMl2PE3QAAG6o9tA (envelope-from ) for ; Mon, 12 Dec 2022 21:17:05 +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 D95ED3ED02 for ; Mon, 12 Dec 2022 21:17:04 +0100 (CET) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1p4pE3-000545-Oi; Mon, 12 Dec 2022 15:16:35 -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 1p4pDj-00050o-Nl for guix-devel@gnu.org; Mon, 12 Dec 2022 15:16:26 -0500 Received: from lev.selidor.net ([66.246.138.156]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1p4pDO-00030o-Nu for guix-devel@gnu.org; Mon, 12 Dec 2022 15:16:15 -0500 Received: from sax (unknown [91.207.57.115]) by lev.selidor.net (Postfix) with ESMTPSA id 540A9CADD; Mon, 12 Dec 2022 20:15:50 +0000 (UTC) Date: Mon, 12 Dec 2022 21:11:53 +0100 From: Ivan Vilata i Balaguer To: Mekeor Melire Cc: guix-devel@gnu.org, Ivan Vilata i Balaguer , 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="RNbqk+5s8qfOOVS0" Content-Disposition: inline In-Reply-To: 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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=1670876225; 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=zxhASu0AYgiL2nGq3N2znd4EDdqumvrBeq8VVMiJNJI=; b=M30tmRi+MTxNKoi1Zo+szpnNDOjtc5V7miVpnDLFMKdK/tQFqUDuUOVNLejJHsFj0b+IwK iev0fySe+dHYSn4oONbPUmOSFmJf2ocTcePSW6dGzsKUJTyAB00zBUSLff00QM45a+/l3m /Gnsr7KcUw/LTyIsyiujvCM22y6BwEWiGghipsabKkFIbUOec8vsGAiJhQgRekw1ccye3c k76AZcA62r/90aMKyIcA0mSuyeO0+4X7qJfCTEocft9sxEJUt/x8q0I2nc8vqVj2wk1gyM aXbQZ2Gtvu5KaMEHnK8sCHKzvKkPEYdGygxPH4rJvK1sCmPHN1LtphpOnvbghw== 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=1670876225; a=rsa-sha256; cv=none; b=QHvg2opfYQIe9Af2Uk73Lwk2XtA0SW5SlK4OHgtTJ/s4XPeqXtk99gd2RkJTktNDxkTeV3 CGDxfnN9lafahnE6rLCulAYAqtDR4CDJj8QlKfhyg7TJweyo/vNajHXRILsAE5elzKtnsk JMn7qt31+f9E96+MP5HbAZflnyfiuFVQfPvbBpUPs61Kf/nhTVp1Sjtjw0e7C/iDH2YfSk sTJFx/L5SfZhQXfphIgE4LKmQczJKABNcC5xkbnGEhv/lo3tHEYzIh1iEfGIeZuh5MsuEs tNWOBXwtqdy3TE1ws+JSmqWprZpmMOVTGj6Ro1H3kNzq+bendRBGizsgC/folg== X-Migadu-Spam-Score: -4.36 X-Spam-Score: -4.36 X-Migadu-Queue-Id: D95ED3ED02 X-Migadu-Scanner: scn1.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: uSgkuaR7kzJr --RNbqk+5s8qfOOVS0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Mekeor Melire (2022-12-10 01:00:24 +0000) wrote: > 2022-12-09 23:10 mekeor@posteo.de: >=20 > > 2022-12-05 17:23 ivan@selidor.net: > > > > > in #59746 I skipped documenting `resume_offset` with more detail, even > > > if it's needed for resuming from a swap file. The reason is that > > > according to [swsusp doc][1], some specific tool may be needed to > > > compute the swap file offset. There is [swap-offset][2] from the > > > uswsusp suite, which is missing from Guix and no longer shipped with > > > Debian. > > > > 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-ubun= tu.html >=20 > I just tried this out. And it worked like a charm! I have hibernated and > resumed successfully - first time with Guix System. I'm so happy :) >=20 > Would you like to add instructions for swap-files to your > patch-series #59746? >=20 > What I did: First, determine offset: >=20 > --8<---------------cut here---------------start------------->8--- > $ sudo filefrag -v /swapfile > Filesystem type is: ef53 > File size of /swapfile is 1717986918 (4194304 blocks of 4096 bytes) > ext: logical_offset: physical_offset: length: expected: fla= gs: > 0: 0.. 0: 5308416.. 5308416: 1: > --8<---------------cut here---------------end--------------->8--- >=20 > Then, use offset in operating-system declaration: >=20 > --8<---------------cut here---------------start------------->8--- > (kernel-arguments > (cons* > "resume=3D/dev/mapper/cryptroot" > "resume_offset=3D5308416" > %default-kernel-arguments)) > --8<---------------cut here---------------end--------------->8--- >=20 > Caveat: IIUC, this does not work with Btrfs. 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 made manually with `filefrag`. [1]: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-utils.g= it/tree/swap-offset.c#n114 I guess that swap header fragmentation won't happen in most cases, but I al= so see that the instructions in "(guix)Keyboard Layout, Networking, and Partitioning" to create a swap file use `dd` instead of something less prone to fragmentation like `fallocate` (which then may or may not work depending= on the particular FS). So I'm not completely at ease with extending the instructions for swap file= s, but someone more versed in the topic may.=A0`:)` Cheers, --=20 Ivan Vilata i Balaguer -- https://elvil.net/ --RNbqk+5s8qfOOVS0 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEHpvwBPZcchIQr6TuPezBBfXdI4IFAmOXiwMACgkQPezBBfXd I4J9bA/7BJcwjLF6QnlQ1X5nH7U8xfIWY+n6qfMcnR8ZiXSFDcfblv8GeCfbI0jM sWOmOSZxeEzhDXerLXDN6TKiSoDHy+Qsa+OrpBMo6vr1wqA2FZHz83dWKoWh93/Q RJL9Rr3TG1aCJLEx9w9uluPwErGxI4aqYZPALTkof2GXnaSt7mWrJXvewQas96tV Gplsziu18oSHCtNpSJn0jyGjycXkuirGh3E5rAwFYblW/FyzuXd/zgyFt8NSJaTu /G6kSD6TI1yDWMycp0K5PcCy3YNzpkkANfoFKhpO8AEPh/TX/d6KMp1uz62N6spy 7IY28L7bku3mFakHk+2ZW/rTYFiDNOWXnJZVgGcE14SjVUQ+PXupu6KgaEpJrEYN CUDjX0RljMxHDfhI52Fez0TtfUB8PSS6VPEiVGs+7bSPo6KuLKWiyEcSY/O7l0U1 7Lm55uZAKsFheDvpzXo/NJ+kUi6kefwidlfGCpY4Pu9QlBCfU9ttBBhcME04p18n xzW+1bMmPFTIB4RaHyJmpP5qZhcA+o1IFn2YAiMnRHe9FERNIt5GBfvhH35iwzpl k1BJLC1cwMiZc0kNyhqQ1qw5Uh267APXwhyWZ1GZ0kaCiTa/ADbH8+ua+liQyFgX TdZayMebxYmCSRyGgHGN5uAVHXv/+z6HmxXPWj6Jq5mcqNFZUaU= =2obw -----END PGP SIGNATURE----- --RNbqk+5s8qfOOVS0--