From: Michael Ellerman <mpe@ellerman.id.au>
To: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [V2,1/1] powerpc/perf/hv-gpci: Increase request buffer size
Date: Wed, 17 Feb 2016 23:41:25 +1100 (AEDT) [thread overview]
Message-ID: <20160217124125.A222E140556@ozlabs.org> (raw)
In-Reply-To: <20160210032405.GA8979@us.ibm.com>
On Wed, 2016-10-02 at 03:24:05 UTC, Sukadev Bhattiprolu wrote:
> >From f1afe08fbc9797ff63adf03efe564a807a37cfe6 Mon Sep 17 00:00:00 2001
> From: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
> Date: Tue, 9 Feb 2016 02:47:45 -0500
> Subject: [PATCH V2 1/1] powerpc/perf/hv-gpci: Increase request buffer size
>
> The GPCI hcall allows for a 4K buffer but we limit the buffer to 1K.
> The problem with a 1K buffer is if a request results in returning
> more values than can be accomodated in the 1K buffer the request will
> fail.
>
> The buffer we are using is currently allocated on the stack and hence
> limited in size. Instead use a per-CPU 4K buffer like we do with 24x7
> counters (hv-24x7.c).
>
> While here, rename the macro GPCI_MAX_DATA_BYTES to HGPCI_MAX_DATA_BYTES
> for consistency with 24x7 counters.
>
> Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/e4f226b1580b36550727c324b4
cheers
prev parent reply other threads:[~2016-02-17 12:41 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-10 3:24 [PATCH V2 1/1] powerpc/perf/hv-gpci: Increase request buffer size Sukadev Bhattiprolu
2016-02-17 12:41 ` Michael Ellerman [this message]
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