public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/66083] Linux kernel fails to boot with O3 optimization
Date: Sat, 09 May 2015 05:01:00 -0000	[thread overview]
Message-ID: <bug-66083-4-sRKblA3KQj@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-66083-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66083

--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Pranith Kumar from comment #3)
> The kernel fails to boot. It works using 4.7/4.8 but 4.9 does not work. Not
> sure what you mean which file. How do I pin point that?

You could start with the failing kernel and replace object files with 
good ones until it boots (or vice versa). 
Once you have pinpoint the file in question you can use 
__attribute__((optimize(O2)) to narrow the issue down to a single function.


  parent reply	other threads:[~2015-05-09  5:01 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-05-09  4:39 [Bug c/66083] New: " bobby.prani at gmail dot com
2015-05-09  4:41 ` [Bug c/66083] " bobby.prani at gmail dot com
2015-05-09  4:53 ` trippels at gcc dot gnu.org
2015-05-09  4:56 ` bobby.prani at gmail dot com
2015-05-09  5:01 ` trippels at gcc dot gnu.org [this message]
2015-07-21 11:22 ` mpolacek at gcc dot gnu.org

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=bug-66083-4-sRKblA3KQj@http.gcc.gnu.org/bugzilla/ \
    --to=gcc-bugzilla@gcc.gnu.org \
    --cc=gcc-bugs@gcc.gnu.org \
    /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 read-only IMAP folder(s) and NNTP newsgroup(s).