linux-kernel - Re: [PATCH V4] mlx4_core: allocate ICM memory in page size chunks

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Message-ID: <cdf0d1a9-378a-8b09-544e-a4918acb57fe@gmail.com>
Date:   Tue, 29 May 2018 23:49:59 -0400
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Eric Dumazet <eric.dumazet@...il.com>,
        David Miller <davem@...emloft.net>, qing.huang@...cle.com
Cc:     tariqt@...lanox.com, haakon.bugge@...cle.com,
        yanjun.zhu@...cle.com, netdev@...r.kernel.org,
        linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
        gi-oh.kim@...fitbricks.com
Subject: Re: [PATCH V4] mlx4_core: allocate ICM memory in page size chunks



On 05/29/2018 11:44 PM, Eric Dumazet wrote:

> 
> And I will add this simple fix, this really should address your initial concern much better.
> 
> @@ -99,6 +100,8 @@ static int mlx4_alloc_icm_pages(struct scatterlist *mem, int order,
>  {
>         struct page *page;
>  
> +       if (order)
> +               gfp_mask |= __GFP_NORETRY;

    and also      gfp_mask &= ~__GFP_DIRECT_RECLAIM


>         page = alloc_pages_node(node, gfp_mask, order);
>         if (!page) {
>                 page = alloc_pages(gfp_mask, order);
>