linux-kernel - Re: [PATCH] vmalloc: Removing incorrect logs when vmalloc failed

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Date:   Tue, 7 Jul 2020 15:18:54 +0530
From:   Anshuman Khandual <anshuman.khandual@....com>
To:     Tian Tao <tiantao6@...ilicon.com>, akpm@...ux-foundation.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Cc:     linuxarm@...wei.com
Subject: Re: [PATCH] vmalloc: Removing incorrect logs when vmalloc failed



On 07/07/2020 02:43 PM, Tian Tao wrote:
> It is not possible to increase size with vmalloc=<size> in arm64
> architecture and it will mislead.however vmalloc return failure
> is a rare occurrence in 'many architectures including arm64'.

But there is a chance that vmalloc() might work on architectures
that support 'vmalloc=' command line i.e after a change and this
information here might be helpful in those cases.

> 
> Signed-off-by: Tian Tao <tiantao6@...ilicon.com>
> ---
>  mm/vmalloc.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/mm/vmalloc.c b/mm/vmalloc.c
> index 89e83d3..c7b5a9a 100644
> --- a/mm/vmalloc.c
> +++ b/mm/vmalloc.c
> @@ -1238,8 +1238,7 @@ static struct vmap_area *alloc_vmap_area(unsigned long size,
>  	}
>  
>  	if (!(gfp_mask & __GFP_NOWARN) && printk_ratelimit())
> -		pr_warn("vmap allocation for size %lu failed: use vmalloc=<size> to increase size\n",
> -			size);
> +		pr_warn("vmap allocation for size %lu failed\n", size);
>  
>  	kmem_cache_free(vmap_area_cachep, va);
>  	return ERR_PTR(-EBUSY);
>