linux-kernel - Re: [PATCH v2] mm/debug: __dump

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Date:   Tue, 12 Nov 2019 14:52:36 -0500
From:   Jerome Glisse <jglisse@...hat.com>
To:     Ralph Campbell <rcampbell@...dia.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] mm/debug: __dump_page() prints an extra line

On Mon, Nov 11, 2019 at 02:55:59PM -0800, Ralph Campbell wrote:
> When dumping struct page information, __dump_page() prints the page type
> with a trailing blank followed by the page flags on a separate line:
> 
> anon
> flags: 0x100000000090034(uptodate|lru|active|head|swapbacked)
> 
> Fix this by using pr_cont() instead of pr_warn() to get a single line:
> 
> anon flags: 0x100000000090034(uptodate|lru|active|head|swapbacked)
> 
> Signed-off-by: Ralph Campbell <rcampbell@...dia.com>

Reviewed-by: Jérôme Glisse <jglisse@...hat.com>

> ---
> 
> v1 -> v2:
> Oops, fix the subject line.
> 
>  mm/debug.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/debug.c b/mm/debug.c
> index 8345bb6e4769..752c78721ea0 100644
> --- a/mm/debug.c
> +++ b/mm/debug.c
> @@ -87,7 +87,7 @@ void __dump_page(struct page *page, const char *reason)
>  	}
>  	BUILD_BUG_ON(ARRAY_SIZE(pageflag_names) != __NR_PAGEFLAGS + 1);
>  
> -	pr_warn("flags: %#lx(%pGp)\n", page->flags, &page->flags);
> +	pr_cont("flags: %#lx(%pGp)\n", page->flags, &page->flags);
>  
>  hex_only:
>  	print_hex_dump(KERN_WARNING, "raw: ", DUMP_PREFIX_NONE, 32,
> -- 
> 2.20.1
> 
>