linux-kernel - Re: [patch 10/10] mm: remove sparsemem allocation details from the bootmem allocator

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20120510144439.eba9c486.akpm@linux-foundation.org>
Date:	Thu, 10 May 2012 14:44:39 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Johannes Weiner <hannes@...xchg.org>
Cc:	Gavin Shan <shangw@...ux.vnet.ibm.com>,
	David Miller <davem@...emloft.net>,
	Yinghai Lu <yinghai@...nel.org>, Tejun Heo <tj@...nel.org>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [patch 10/10] mm: remove sparsemem allocation details from the
 bootmem allocator

On Mon,  7 May 2012 13:37:52 +0200
Johannes Weiner <hannes@...xchg.org> wrote:

> alloc_bootmem_section() derives allocation area constraints from the
> specified sparsemem section.  This is a bit specific for a generic
> memory allocator like bootmem, though, so move it over to sparsemem.
> 
> As __alloc_bootmem_node_nopanic() already retries failed allocations
> with relaxed area constraints, the fallback code in sparsemem.c can be
> removed and the code becomes a bit more compact overall.
> 
> ...
>
> @@ -332,9 +334,9 @@ static void __init check_usemap_section_nr(int nid, unsigned long *usemap)
>  #else
>  static unsigned long * __init
>  sparse_early_usemaps_alloc_pgdat_section(struct pglist_data *pgdat,
> -					 unsigned long count)
> +					 unsigned long size)
>  {
> -	return NULL;
> +	return alloc_bootmem_node_nopanic(pgdat, size)

You've been bad.   Your penance is to runtime test this code with
CONFIG_MEMORY_HOTREMOVE=n!
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/