From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Milind Chabbi <chabbi.milind@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>,
peterz@infradead.org, mingo@redhat.com,
alexander.shishkin@linux.intel.com, namhyung@kernel.org,
linux-kernel@vger.kernel.org,
Michael Kerrisk-manpages <mtk.manpages@gmail.com>,
linux-man@vger.kernel.org, mpe@ellerman.id.au,
ak@linux.intel.com, kan.liang@intel.com,
hbathini@linux.vnet.ibm.com, sukadev@linux.vnet.ibm.com,
yao.jin@linux.intel.com
Subject: Re: [PATCH] perf/core: fast breakpoint modification via _IOC_MODIFY_BREAKPOINT
Date: Mon, 6 Nov 2017 12:03:50 -0300 [thread overview]
Message-ID: <20171106150350.GD2692@kernel.org> (raw)
In-Reply-To: <CAMmz+YnaoN3-7DN5WysQvhWNyGhM7_WDz5AQAnvP6FO_GMnMgw@mail.gmail.com>
Em Mon, Nov 06, 2017 at 07:00:29AM -0800, Milind Chabbi escreveu:
> Hi Jirka,
>
> I see the tabs in my sent email, do you have suggestions on how best to
> send this patch so that the tabs are preserved by the email client?
Documentation/process/email-clients.rst
- Arnaldo
> Can anybody else also check if they received with/without tabs?
>
> release_bp_slot/reserve_bp_slot majic is not necessary since
> _IOC_MODIFY_BREAKPOINT ioctl modifies an already registered breakpoint
> without affecting the count of breakpoints active.
>
> -Milind
>
> On Mon, Nov 6, 2017 at 1:23 AM, Jiri Olsa <jolsa@redhat.com> wrote:
>
> > On Sun, Nov 05, 2017 at 02:35:34PM -0800, Milind Chabbi wrote:
> >
> > SNIP
> >
> > > +static int _perf_event_modify_breakpoint(struct perf_event *bp,
> > > + struct perf_event_attr *attr)
> > > +{
> > > + u64 old_addr = bp->attr.bp_addr;
> > > + u64 old_len = bp->attr.bp_len;
> > > + int old_type = bp->attr.bp_type;
> > > + int err = 0;
> > > +
> > > + _perf_event_disable(bp);
> > > +
> > > + bp->attr.bp_addr = attr->bp_addr;
> > > + bp->attr.bp_type = attr->bp_type;
> > > + bp->attr.bp_len = attr->bp_len;
> > > +
> > > + if (attr->disabled)
> > > + goto end;
> > > +
> > > + err = validate_hw_breakpoint(bp);
> >
> > thre patch is mangled.. seems like you've lost all your tabs somehow
> >
> > anyway, should you also do the release_bp_slot/reserve_bp_slot
> > magic to keep the slot accounting corrent?
> >
> > jirka
> >
next parent reply other threads:[~2017-11-06 15:03 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAMmz+YnaoN3-7DN5WysQvhWNyGhM7_WDz5AQAnvP6FO_GMnMgw@mail.gmail.com>
2017-11-06 15:03 ` Arnaldo Carvalho de Melo [this message]
2017-11-06 22:09 [PATCH] perf/core: fast breakpoint modification via _IOC_MODIFY_BREAKPOINT Milind Chabbi
2017-11-06 23:16 ` Andi Kleen
2017-11-07 8:15 ` Peter Zijlstra
2017-11-07 17:09 ` Andi Kleen
2017-11-07 8:14 ` Peter Zijlstra
2017-11-07 15:43 ` Milind Chabbi
2017-11-07 17:24 ` Andi Kleen
2017-11-07 17:42 ` Milind Chabbi
2017-11-07 19:01 ` Peter Zijlstra
2017-11-07 19:31 ` Milind Chabbi
2017-11-08 13:35 ` kbuild test robot
2017-11-08 13:51 ` kbuild test robot
[not found] <CAMmz+Y=Py0dw63tuww+Oa4rWi_Hghhs3DHmNX=Tf1Yt_JH4O+Q@mail.gmail.com>
2017-11-06 9:23 ` Jiri Olsa
[not found] ` <CAMmz+YkB955Na6wOMmgqZX_TxqsBh86FiLi8EXmOrg1vwm-fGA@mail.gmail.com>
2017-11-08 14:15 ` Jiri Olsa
2017-11-08 15:02 ` Milind Chabbi
2017-11-08 15:12 ` Jiri Olsa
2017-11-08 15:51 ` Milind Chabbi
2017-11-08 15:57 ` Jiri Olsa
2017-11-08 16:59 ` Milind Chabbi
2017-11-09 7:52 ` Jiri Olsa
2017-11-09 13:12 ` Jiri Olsa
2017-11-09 18:59 ` Milind Chabbi
2017-11-12 19:09 ` Milind Chabbi
2017-11-13 7:46 ` Jiri Olsa
2017-11-13 8:02 ` Milind Chabbi
2017-11-26 19:31 ` Jiri Olsa
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