From: "Bruno Prémont" <bonbons@linux-vserver.org>
To: Matt Fleming <matt@console-pimps.org>
Cc: P J P <ppandit@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org
Subject: Re: 3.12 to 3.13 boot regression bisected - still applies to 3.16
Date: Tue, 5 Aug 2014 13:51:30 +0200 [thread overview]
Message-ID: <20140805135130.2d180b69@pluto> (raw)
In-Reply-To: <20140805091848.GN15082@console-pimps.org>
On Tue, 5 Aug 2014 10:18:48 +0100 Matt Fleming wrote:
> On Tue, 05 Aug, at 11:13:30AM, Bruno Prémont wrote:
> >
> > I get at least to just before
> > status = efi_call_early(exit_boot_services, handle, key);
> > in eboot.c on line 1310. A efi_printk inserted there is displayed.
>
> This is worth pointing out in case you're unaware, but do you know that
> it's not valid to call efi_printk() after ExitBootServices()? Doing so
> will almost certainly cause your machine to fault.
I am aware that efi_printk() uses boot services!
Now I tried out loops at many places and have gotten up to line 340 in
arch/x86/kernel/head_64.S
System reboots within the following assembler instructions (does not
reach line 359).
So efi_main() returns successfully but the assembler code following it
gets something wrong.
I'm going to try further to determine which line between 340 and 359 is
the "bad" one.
Bruno
next prev parent reply other threads:[~2014-08-05 11:51 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-04 9:34 3.12 to 3.13 boot regression bisected - still applies to 3.16 Bruno Prémont
2014-08-04 12:27 ` Matt Fleming
2014-08-04 13:06 ` Bruno Prémont
2014-08-04 13:54 ` Matt Fleming
2014-08-05 8:02 ` Bruno Prémont
2014-08-05 8:45 ` Matt Fleming
2014-08-05 9:13 ` Bruno Prémont
2014-08-05 9:18 ` Matt Fleming
2014-08-05 11:51 ` Bruno Prémont [this message]
2014-08-05 12:11 ` Bruno Prémont
2014-08-05 12:55 ` Matt Fleming
2014-08-05 14:21 ` Bruno Prémont
2014-08-05 15:07 ` Matt Fleming
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20140805135130.2d180b69@pluto \
--to=bonbons@linux-vserver.org \
--cc=akpm@linux-foundation.org \
--cc=linux-efi@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=matt@console-pimps.org \
--cc=ppandit@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).