netdev - Re: [PATCH] net/mlx5: Fix failing fw tracer allocation on s390

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Date:   Thu, 9 Apr 2020 22:10:25 +0000
From:   Saeed Mahameed <saeedm@...lanox.com>
To:     "schnelle@...ux.ibm.com" <schnelle@...ux.ibm.com>
CC:     Eran Ben Elisha <eranbe@...lanox.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "leon@...nel.org" <leon@...nel.org>,
        Moshe Shemesh <moshe@...lanox.com>
Subject: Re: [PATCH] net/mlx5: Fix failing fw tracer allocation on s390

On Thu, 2020-04-09 at 09:46 +0200, Niklas Schnelle wrote:
> On s390 FORCE_MAX_ZONEORDER is 9 instead of 11, thus a larger
> kzalloc()
> allocation as done for the firmware tracer will always fail.
> 
> Looking at mlx5_fw_tracer_save_trace(), it is actually the driver
> itself
> that copies the debug data into the trace array and there is no need
> for
> the allocation to be contiguous in physical memory. We can therefor
> use
> kvzalloc() instead of kzalloc() and get rid of the large contiguous
> allcoation.
> 
> Fixes: f53aaa31cce7 ("net/mlx5: FW tracer, implement tracer logic")
> Signed-off-by: Niklas Schnelle <schnelle@...ux.ibm.com>

Applied to net-mlx5, will be submitted to net in my next pull request.

Thanks,
Saeed.