netdev - Re: [PATCH mlx5-next 3/4] net/mlx5: Decrease default mr cache size

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Message-ID: <20190327114101.GT22899@mtr-leonro.mtl.com>
Date:   Wed, 27 Mar 2019 13:41:01 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Or Gerlitz <gerlitz.or@...il.com>
Cc:     Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        RDMA mailing list <linux-rdma@...r.kernel.org>,
        Artemy Kovalyov <artemyko@...lanox.com>,
        Guy Levi <guyle@...lanox.com>,
        Haggai Eran <haggaie@...lanox.com>,
        Jerome Glisse <jglisse@...hat.com>,
        Moni Shoua <monis@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        linux-netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH mlx5-next 3/4] net/mlx5: Decrease default mr cache size

On Wed, Mar 27, 2019 at 12:07:54PM +0200, Or Gerlitz wrote:
> On Tue, Mar 19, 2019 at 11:25 AM Leon Romanovsky <leon@...nel.org> wrote:
> > From: Artemy Kovalyov <artemyko@...lanox.com>
> >
> > Delete initialization of high order entries in mr cache to decrease initial
> > memory footprint. When required, the administrator can populate the
> > entries with memory keys via the /sys interface.
>
> Please add here:
>
> This approach is very helpful to reduce the per HW function memory
> footprint in environments such as VMs. Before the patch we see
> consumption of 0.9GB per function and after the patch about 0.1GB
>
> > Signed-off-by: Artemy Kovalyov <artemyko@...lanox.com>
> > Signed-off-by: Moni Shoua <monis@...lanox.com>
> > Signed-off-by: Leon Romanovsky <leonro@...lanox.com>
>
> Reported-by:  Shalom Toledo <shalomt@...lanox.com>
> Acked-by: Or Gerlitz <ogerlitz@...lanox.com>
>
> Lets push it into stable kernels, a Fixes tag here will cause that
> to happen more easily, so please consider that.

Thanks,

I'll add it at the "apply" stage.

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