linux-kernel - Re: [PATCH 3/3] blk-throttle: don't parse cgroup path if trace isn't enabled

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

Message-ID: <20160511002004.GA2293701@devbig084.prn1.facebook.com>
Date:	Tue, 10 May 2016 17:20:04 -0700
From:	Shaohua Li <shli@...com>
To:	Jeff Moyer <jmoyer@...hat.com>
CC:	<linux-block@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>, <axboe@...com>,
	<Kernel-team@...com>
Subject: Re: [PATCH 3/3] blk-throttle: don't parse cgroup path if trace isn't
 enabled

On Tue, May 10, 2016 at 11:52:15AM -0400, Jeff Moyer wrote:
> Shaohua Li <shli@...com> writes:
> 
> > if trace isn't enabled, parsing cgroup path just wastes cpu
> >
> > Signed-off-by: Shaohua Li <shli@...com>
> > ---
> >  block/blk-throttle.c         | 5 ++---
> >  include/linux/blktrace_api.h | 9 +++++++++
> >  2 files changed, 11 insertions(+), 3 deletions(-)
> >
> > diff --git a/block/blk-throttle.c b/block/blk-throttle.c
> > index 2149a1d..47a3e54 100644
> > --- a/block/blk-throttle.c
> > +++ b/block/blk-throttle.c
> > @@ -211,15 +211,14 @@ static struct throtl_data *sq_to_td(struct throtl_service_queue *sq)
> >   *
> >   * The messages are prefixed with "throtl BLKG_NAME" if @sq belongs to a
> >   * throtl_grp; otherwise, just "throtl".
> > - *
> > - * TODO: this should be made a function and name formatting should happen
> > - * after testing whether blktrace is enabled.
> 
> You've only addressed the second part of the TODO, please don't remove
> the first part.

alright, I'll send a patch to convert it to a function.