mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: Steven Rostedt <rostedt@goodmis.org>
To: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: mingo@elte.hu, hpa@zytor.com, linux-kernel@vger.kernel.org
Subject: Re: [patch 3/3] x86_64, cpa: use only text section in set_kernel_text_rw/ro
Date: Wed, 28 Oct 2009 22:06:17 -0400	[thread overview]
Message-ID: <1256781977.26028.2139.camel@gandalf.stny.rr.com> (raw)
In-Reply-To: <20091029024821.164525222@sbs-t61.sc.intel.com>

On Wed, 2009-10-28 at 18:46 -0800, Suresh Siddha wrote:
> plain text document attachment (fix_kernel_text_ro_rw.patch)
> set_kernel_text_rw()/set_kernel_text_ro() are marking pages starting
> from _text to __start_rodata as RW or RO.
> 
> With CONFIG_DEBUG_RODATA, there might be free pages (associated with
> padding the sections to 2MB large page boundary) between text
> and rodata sections that are given back to page allocator. So we should
> use only use the start (__text) and end (__stop___ex_table) of the
> text section in set_kernel_text_rw()/set_kernel_text_ro().
> 
> Cc: Steven Rostedt <rostedt@goodmis.org>
> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
> ---
>  

I'll go ahead and test this to make sure it does not bust ftrace with an
allyesconfig.

Thanks,

-- Steve



  reply	other threads:[~2009-10-29  2:06 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-10-29  2:46 [patch 1/3] x86, cpa: fix kernel text RO checks in static_protection() Suresh Siddha
2009-10-29  2:05 ` Steven Rostedt
2009-10-29  2:46 ` [patch 2/3] x86_64, ftrace: make ftrace use kernel identity mapping to modify code Suresh Siddha
2009-11-02 18:54   ` [tip:x86/mm] x86_64, ftrace: Make " tip-bot for Suresh Siddha
2009-10-29  2:46 ` [patch 3/3] x86_64, cpa: use only text section in set_kernel_text_rw/ro Suresh Siddha
2009-10-29  2:06   ` Steven Rostedt [this message]
2009-10-30 19:17     ` Suresh Siddha
2009-10-30 19:59       ` Steven Rostedt
2009-11-02 18:55   ` [tip:x86/mm] x86_64, cpa: Use " tip-bot for Suresh Siddha
2009-11-02 18:54 ` [tip:x86/mm] x86, cpa: Fix kernel text RO checks in static_protection() tip-bot for Suresh Siddha

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=1256781977.26028.2139.camel@gandalf.stny.rr.com \
    --to=rostedt@goodmis.org \
    --cc=hpa@zytor.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@elte.hu \
    --cc=suresh.b.siddha@intel.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
all inboxes | Powered by JetHome®