Received-SPF: pass (google.com: best guess record for domain of linux-ext4-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Subject: Re: Linux 5.3-rc8
To:     "Eric W. Biederman" <ebiederm@xmission.com>,
        Lennart Poettering <mzxreary@0pointer.de>
Cc:     Linus Torvalds <torvalds@linux-foundation.org>,
        "Ahmed S. Darwish" <darwish.07@gmail.com>,
        "Theodore Y. Ts'o" <tytso@mit.edu>, Willy Tarreau <w@1wt.eu>,
        Matthew Garrett <mjg59@srcf.ucam.org>,
        Vito Caputo <vcaputo@pengaru.com>,
        Andreas Dilger <adilger.kernel@dilger.ca>,
        Jan Kara <jack@suse.cz>, Ray Strode <rstrode@redhat.com>,
        William Jon McCann <mccann@jhu.edu>,
        zhangjs <zachary@baishancloud.com>, linux-ext4@vger.kernel.org,
        lkml <linux-kernel@vger.kernel.org>
References: <CAHk-=wgs65hez6ctK7J2k46BdQzvKU5avExPOTTJsZu6iqA-ow@mail.gmail.com>
 <C4F7DC65-50B9-4D70-8E9B-0A6FF5C1070A@srcf.ucam.org>
 <20190917052438.GA26923@1wt.eu> <2508489.jOnZlRuxVn@merkaba>
 <20190917121156.GC6762@mit.edu>
 <20190917123015.sirlkvy335crozmj@debian-stretch-darwi.lab.linutronix.de>
 <20190917160844.GC31567@gardel-login>
 <CAHk-=wgsWTCZ=LPHi7BXzFCoWbyp3Ey-zZbaKzWixO91Ryr9=A@mail.gmail.com>
 <20190917174219.GD31798@gardel-login> <87zhj15qgf.fsf@x220.int.ebiederm.org>
From:   "Alexander E. Patrakov" <patrakov@gmail.com>
Message-ID: <84824f79-2d12-0fd5-5b32-b0360eb075ac@gmail.com>
Date:   Thu, 19 Sep 2019 01:15:36 +0500
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101
 Thunderbird/68.1.0
MIME-Version: 1.0
In-Reply-To: <87zhj15qgf.fsf@x220.int.ebiederm.org>
Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="------------ms060200010904000806000409"
Sender: linux-ext4-owner@vger.kernel.org
Precedence: bulk

This is a cryptographically signed message in MIME format.

--------------ms060200010904000806000409
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Language: en-PH
Content-Transfer-Encoding: quoted-printable

19.09.2019 00:56, Eric W. Biederman =D0=BF=D0=B8=D1=88=D0=B5=D1=82:

> The cheap solution appears to be copying a random seed from a previous
> boot, and I think that will take care of many many cases, and has
> already been implemented.  Which reduces this to a system first
> boot issue.

No, this is not the solution, if we take seriously not only getrandom=20
hangs, but also urandom warnings. In some setups (root on LUKS is one of =

them) they happen early in the initramfs. Therefore "restoring" entropy=20
from the previous boot by a script that runs from the main system is too =

late. That's why it is suggested to load at least a part of the random=20
seed in the boot loader, and that has not been commonly implemented.

--=20
Alexander E. Patrakov


--------------ms060200010904000806000409
Content-Type: application/pkcs7-signature; name="smime.p7s"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="smime.p7s"
Content-Description: Криптографическая подпись S/MIME
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--------------ms060200010904000806000409--