linux-kernel - Re: x86/.../trampoline

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20080201221512.GA13276@elf.ucw.cz>
Date:	Fri, 1 Feb 2008 23:15:12 +0100
From:	Pavel Machek <pavel@....cz>
To:	kernel list <linux-kernel@...r.kernel.org>
Cc:	Linux-pm mailing list <linux-pm@...ts.osdl.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: x86/.../trampoline_64.S racy?

On Fri 2008-02-01 23:07:16, Pavel Machek wrote:
> Hi!
> 
> I'm trying to reuse trampoline_64.S for wakeup from ACPI s3... but I'm
> getting some badness: If I insert delay loops into trampoline_64.S,
> machine fails to boot; but I already increased cpu bootup delay to 200
> seconds...
> 
> Is it possible that bootup is subtly racy somewhere?

No, I just missed another place with timeout:

                /*
                 * Wait 5s total for a response
                 */
                for (timeout = 0; timeout < 5000000; timeout++) {
                        if (cpu_isset(cpu, cpu_callin_map))
                                break;  /* It has booted */
                        udelay(100);
                }

									Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/