linux-kernel - Re: [PATCH 0/6 v3] kvmalloc

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Message-ID: <1485432877.12563.100.camel@perches.com>
Date:   Thu, 26 Jan 2017 04:14:37 -0800
From:   Joe Perches <joe@...ches.com>
To:     Michal Hocko <mhocko@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>
Cc:     Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>, Mel Gorman <mgorman@...e.de>,
        Johannes Weiner <hannes@...xchg.org>,
        linux-mm <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        marcelo.leitner@...il.com
Subject: Re: [PATCH 0/6 v3] kvmalloc

On Thu, 2017-01-26 at 11:32 +0100, Michal Hocko wrote:
> So I have folded the following to the patch 1. It is in line with
> kvmalloc and hopefully at least tell more than the current code.
[]
> diff --git a/mm/vmalloc.c b/mm/vmalloc.c
[]
> @@ -1741,6 +1741,13 @@ void *__vmalloc_node_range(unsigned long size, unsigned long align,
>   *	Allocate enough pages to cover @size from the page level
>   *	allocator with @gfp_mask flags.  Map them into contiguous
>   *	kernel virtual space, using a pagetable protection of @prot.
> + *
> + *	Reclaim modifiers in @gfp_mask - __GFP_NORETRY, __GFP_REPEAT
> + *	and __GFP_NOFAIL are not supported

Maybe add a BUILD_BUG or a WARN_ON_ONCE to catch new occurrences?