linux-kernel - Re: [PATCH] mm/page_alloc: check return value of memblock_alloc_node

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Date:   Thu, 17 Jan 2019 13:26:11 +0200
From:   Mike Rapoport <rppt@...ux.ibm.com>
To:     William Kucharski <william.kucharski@...cle.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/page_alloc: check return value of
 memblock_alloc_node_nopanic()

On Thu, Jan 17, 2019 at 03:19:35AM -0700, William Kucharski wrote:
> 
> This seems very reasonable, but if the code is just going to panic if the
> allocation fails, why not call memblock_alloc_node() instead?

I've sent patches [1] that remove panic() from memblock_alloc*() and drop
_nopanic variants. After they will be (hopefully) merged,
memblock_alloc_node() will return NULL on error.
 
> If there is a reason we'd prefer to call memblock_alloc_node_nopanic(),
> I'd like to see pgdat->nodeid printed in the panic message as well.

Sure.

[1] https://lore.kernel.org/lkml/1547646261-32535-1-git-send-email-rppt@linux.ibm.com/

-- 
Sincerely yours,
Mike.