linux-kernel - [PATCH v3 1/3] mm: Silence vmap() allocation failures based on caller gfp

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Message-Id: <20170427181902.28829-2-f.fainelli@gmail.com>
Date:   Thu, 27 Apr 2017 11:19:00 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.com>, zijun_hu <zijun_hu@....com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Chris Wilson <chris@...is-wilson.co.uk>,
        linux-kernel@...r.kernel.org (open list),
        linux-mm@...ck.org (open list:MEMORY MANAGEMENT),
        angus@...usclark.org
Subject: [PATCH v3 1/3] mm: Silence vmap() allocation failures based on caller gfp_flags

If the caller has set __GFP_NOWARN don't print the following message:
vmap allocation for size 15736832 failed: use vmalloc=<size> to increase
size.

This can happen with the ARM/Linux or ARM64/Linux module loader built
with CONFIG_ARM{,64}_MODULE_PLTS=y which does a first attempt at loading
a large module from module space, then falls back to vmalloc space.

Acked-by: Michal Hocko <mhocko@...e.com>
Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
 mm/vmalloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 0b057628a7ba..b74f1d01ef76 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -521,7 +521,7 @@ static struct vmap_area *alloc_vmap_area(unsigned long size,
 		}
 	}
 
-	if (printk_ratelimit())
+	if (!(gfp_mask & __GFP_NOWARN) && printk_ratelimit())
 		pr_warn("vmap allocation for size %lu failed: use vmalloc=<size> to increase size\n",
 			size);
 	kfree(va);
-- 
2.9.3