From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jiri Olsa <jolsa@redhat.com>
Subject: Re: [PATCH] perf/core: fast breakpoint modification via
 _IOC_MODIFY_BREAKPOINT
Date: Wed, 8 Nov 2017 15:15:22 +0100
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To: Milind Chabbi <chabbi.milind@gmail.com>
Cc: peterz@infradead.org, mingo@redhat.com, acme@kernel.org, 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
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On Mon, Nov 06, 2017 at 07:04:40AM -0800, Milind Chabbi wrote:
> 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?
> 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.

but AFAICS you allow to change the breakpoint type (bp_type)
and slot counts are based on the breakpoint type

jirka