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Date: Tue, 22 Mar 2022 09:21:20 -0700 From: Linus Torvalds <torvalds@...ux-foundation.org> To: Guenter Roeck <linux@...ck-us.net> Cc: "Jason A. Donenfeld" <Jason@...c4.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Linux Crypto Mailing List <linux-crypto@...r.kernel.org>, linux-arch <linux-arch@...r.kernel.org>, Dinh Nguyen <dinguyen@...nel.org>, Nick Hu <nickhu@...estech.com>, Max Filippov <jcmvbkbc@...il.com>, Palmer Dabbelt <palmer@...belt.com>, "David S . Miller" <davem@...emloft.net>, Yoshinori Sato <ysato@...rs.sourceforge.jp>, Michal Simek <monstr@...str.eu>, Borislav Petkov <bp@...en8.de>, Guo Ren <guoren@...nel.org>, Geert Uytterhoeven <geert@...ux-m68k.org>, Joshua Kinard <kumba@...too.org>, David Laight <David.Laight@...lab.com>, Dominik Brodowski <linux@...inikbrodowski.net>, Eric Biggers <ebiggers@...gle.com>, Ard Biesheuvel <ardb@...nel.org>, Arnd Bergmann <arnd@...db.de>, Thomas Gleixner <tglx@...utronix.de>, Andy Lutomirski <luto@...nel.org>, Kees Cook <keescook@...omium.org>, Lennart Poettering <mzxreary@...inter.de>, Konstantin Ryabitsev <konstantin@...uxfoundation.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, "Theodore Ts'o" <tytso@....edu> Subject: Re: [PATCH v1] random: block in /dev/urandom On Tue, Mar 22, 2022 at 8:58 AM Guenter Roeck <linux@...ck-us.net> wrote: > > This patch (or a later version of it) made it into mainline and causes a > large number of qemu boot test failures for various architectures (arm, > m68k, microblaze, sparc32, xtensa are the ones I observed). Common > denominator is that boot hangs at "Saving random seed:". A sample bisect > log is attached. Reverting this patch fixes the problem. Ok, it was worth trying, but yeah, it clearly causes problems for various platforms that can't do jitter entropy and have nothing else happening either. Will revert. Thanks. Linus
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