| 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
| ||
|
Date: Thu, 27 Aug 2009 18:10:53 -0400
From: Gregory Haskins <gregory.haskins@...il.com>
To: Steven Rostedt <rostedt@...dmis.org>
CC: Ingo Molnar <mingo@...e.hu>,
Frédéric Weisbecker <fweisbec@...il.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: FTRACE: regression in 31-rc7
Steven Rostedt wrote:
> On Thu, 27 Aug 2009, Gregory Haskins wrote:
>
>> Hi Steve,
>>
>> Steven Rostedt wrote:
>> instrumented for some reason.
>>> Hmm, so you think something with the modules broke? I can test that out
>>> here.
>> Thats my (admittedly fairly ignorant) theory based on the limited data
>> samples I have in front of me. :)
>>
>> If I get a chance later, I will try to do something more scientific, or
>> at least a bisect.
>
> I just did this:
Sorry, was away from the computer for a while...
In light of these reports, I suspect this may either be some kind of
operator error, or a bad build or something. I will retry -rc7 with a
clean build later and see if it still reproduces. Until then, apologies
for the noise.
Kind Regards,
-Greg
>
> # uname -r
> 2.6.31-rc7
> # echo :mod:ext3 > set_ftrace_filter
> # echo function_graph > current_tracer
> # cat trace
> # tracer: function_graph
> #
> # CPU DURATION FUNCTION CALLS
> # | | | | | | |
> 1) 6.928 us | ext3_permission();
> 1) 1.234 us | ext3_permission();
> ------------------------------------------
> 1) gdm-bin-3477 => pcscd-2951
> ------------------------------------------
>
> 1) 1.306 us | ext3_permission();
> 1) 1.314 us | ext3_permission();
> 1) 1.244 us | ext3_permission();
> 1) 1.364 us | ext3_permission();
> 1) 1.251 us | ext3_permission();
> 1) 1.473 us | ext3_permission();
> 1) 1.306 us | ext3_permission();
> 1) 1.401 us | ext3_permission();
> 1) 1.243 us | ext3_permission();
> 1) 1.301 us | ext3_permission();
> 1) 1.439 us | ext3_permission();
> 1) 1.239 us | ext3_permission();
> 1) 1.331 us | ext3_permission();
> 1) 1.423 us | ext3_permission();
> 1) 1.243 us | ext3_permission();
> 1) 1.321 us | ext3_permission();
> ------------------------------------------
> 1) pcscd-2951 => gdm-bin-3477
> ------------------------------------------
>
> 1) 2.567 us | ext3_permission();
> 1) 1.139 us | ext3_permission();
> 1) 2.329 us | ext3_permission();
> 1) 1.246 us | ext3_permission();
> 1) 1.321 us | ext3_permission();
> 1) 0.989 us | ext3_permission();
> 1) 1.261 us | ext3_permission();
> 1) 1.209 us | ext3_permission();
> 1) 1.221 us | ext3_permission();
> 1) 0.968 us | ext3_permission();
> 1) 2.319 us | ext3_permission();
> 1) 1.221 us | ext3_permission();
> 1) 2.199 us | ext3_permission();
> 1) 1.269 us | ext3_permission();
> ------------------------------------------
> 1) gdm-bin-3477 => bash-3198
> ------------------------------------------
>
> 1) 2.852 us | ext3_permission();
> 1) | ext3_readdir() {
> 1) 1.249 us | free_rb_tree_fname();
> 1) | ext3_htree_fill_tree() {
> 1) | htree_dirblock_to_tree() {
> 1) | ext3_bread() {
> 1) | ext3_getblk() {
> 1) | ext3_get_blocks_handle() {
> 1) 1.046 us | ext3_block_to_path();
>
>
> This is with the latest Linus git:
>
> commit 1e23502cc57cef33455ac7cb9111e3c6d991a894
> Merge: e99b1f2... 3161e45...
> Author: Linus Torvalds <torvalds@...ux-foundation.org>
> Date: Wed Aug 26 20:54:48 2009 -0700
>
> -- Steve
>
Download attachment "signature.asc" of type "application/pgp-signature" (268 bytes)
Powered by blists - more mailing lists