linux-kernel - Re: [PATCH 1/3] perf/core: Provide a kernel-internal interface to recalibrate event period

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]

Date:   Mon, 7 Oct 2019 09:25:10 -0400
From:   "Liang, Kan" <kan.liang@...ux.intel.com>
To:     Paolo Bonzini <pbonzini@...hat.com>,
        Like Xu <like.xu@...ux.intel.com>, kvm@...r.kernel.org,
        rkrcmar@...hat.com, sean.j.christopherson@...el.com,
        vkuznets@...hat.com, peterz@...radead.org,
        Jim Mattson <jmattson@...gle.com>
Cc:     Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        ak@...ux.intel.com, wei.w.wang@...el.com, kan.liang@...el.com,
        like.xu@...el.com, ehankland@...gle.com, arbel.moshe@...cle.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] perf/core: Provide a kernel-internal interface to
 recalibrate event period



On 10/7/2019 8:01 AM, Paolo Bonzini wrote:
> On 30/09/19 09:22, Like Xu wrote:
>> -static int perf_event_period(struct perf_event *event, u64 __user *arg)
>> +static int _perf_event_period(struct perf_event *event, u64 value)
> 
> __perf_event_period or perf_event_period_locked would be more consistent
> with other code in Linux.
> 

But that will be not consistent with current perf code. For example, 
_perf_event_enable(), _perf_event_disable(), _perf_event_reset() and 
_perf_event_refresh().
Currently, The function name without '_' prefix is the one exported and 
with lock. The function name with '_' prefix is the main body.

If we have to use the "_locked" or "__", I think we'd better change the 
name for other functions as well.

Thanks,
Kan