From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: linux-nvdimm@lists.01.org, linuxppc-dev@lists.ozlabs.org,
Vaibhav Jain <vaibhav@linux.ibm.com>
Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>
Subject: Re: [PATCH v2] powerpc/papr_scm: Limit the readability of 'perf_stats' sysfs attribute
Date: Thu, 10 Sep 2020 22:55:34 +1000 (AEST) [thread overview]
Message-ID: <159974250773.1017939.2467058218314439278.b4-ty@ellerman.id.au> (raw)
In-Reply-To: <20200907110540.21349-1-vaibhav@linux.ibm.com>
On Mon, 7 Sep 2020 16:35:40 +0530, Vaibhav Jain wrote:
> The newly introduced 'perf_stats' attribute uses the default access
> mode of 0444 letting non-root users access performance stats of an
> nvdimm and potentially force the kernel into issuing large number of
> expensive HCALLs. Since the information exposed by this attribute
> cannot be cached hence its better to ward of access to this attribute
> from users who don't need to access these performance statistics.
>
> [...]
Applied to powerpc/fixes.
[1/1] powerpc/papr_scm: Limit the readability of 'perf_stats' sysfs attribute
https://git.kernel.org/powerpc/c/0460534b532e5518c657c7d6492b9337d975eaa3
cheers
prev parent reply other threads:[~2020-09-10 13:04 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-07 11:05 [PATCH v2] powerpc/papr_scm: Limit the readability of 'perf_stats' sysfs attribute Vaibhav Jain
2020-09-08 21:27 ` Ira Weiny
2020-09-10 12:55 ` Michael Ellerman [this message]
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