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Date: Wed, 20 Jun 2018 15:26:53 -0700
From: Matthew Wilcox <willy@...radead.org>
To: Rick Edgecombe <rick.p.edgecombe@...el.com>
Cc: tglx@...utronix.de, mingo@...hat.com, hpa@...or.com, x86@...nel.org,
linux-kernel@...r.kernel.org, linux-mm@...ck.org,
kernel-hardening@...ts.openwall.com, kristen.c.accardi@...el.com,
dave.hansen@...el.com, arjan.van.de.ven@...el.com
Subject: Re: [PATCH 1/3] vmalloc: Add __vmalloc_node_try_addr function
On Wed, Jun 20, 2018 at 03:09:28PM -0700, Rick Edgecombe wrote:
>
> /**
> + * __vmalloc_try_addr - try to alloc at a specific address
> + * @addr: address to try
> + * @size: size to try
> + * @gfp_mask: flags for the page level allocator
> + * @prot: protection mask for the allocated pages
> + * @vm_flags: additional vm area flags (e.g. %VM_NO_GUARD)
> + * @node: node to use for allocation or NUMA_NO_NODE
> + * @caller: caller's return address
> + *
> + * Try to allocate at the specific address. If it succeeds the address is
> + * returned. If it fails NULL is returned. It may trigger TLB flushes.
* Try to allocate memory at a specific address. May trigger TLB flushes.
*
* Context: Process context.
* Return: The allocated address if it succeeds. NULL if it fails.
> @@ -1759,8 +1795,9 @@ void *__vmalloc_node_range(unsigned long size, unsigned long align,
> return addr;
>
> fail:
> - warn_alloc(gfp_mask, NULL,
> - "vmalloc: allocation failure: %lu bytes", real_size);
> + if (!(gfp_mask & __GFP_NOWARN))
> + warn_alloc(gfp_mask, NULL,
> + "vmalloc: allocation failure: %lu bytes", real_size);
> return NULL;
Not needed:
void warn_alloc(gfp_t gfp_mask, nodemask_t *nodemask, const char *fmt, ...)
{
...
if ((gfp_mask & __GFP_NOWARN) || !__ratelimit(&nopage_rs))
return;
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