From: Christoph Lameter <clameter@sgi.com>
To: Eric Dumazet <dada1@cosmosbay.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
linux kernel <linux-kernel@vger.kernel.org>,
David Miller <davem@davemloft.net>
Subject: Re: [PATCH] MM : alloc_large_system_hash() can free some memory for non power-of-two bucketsize
Date: Fri, 18 May 2007 11:21:12 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0705181118530.11881@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <20070518115454.d3e32f4d.dada1@cosmosbay.com>
On Fri, 18 May 2007, Eric Dumazet wrote:
> table = (void*) __get_free_pages(GFP_ATOMIC, order);
ATOMIC? Is there some reason why we need atomic here?
> + /*
> + * If bucketsize is not a power-of-two, we may free
> + * some pages at the end of hash table.
> + */
> + if (table) {
> + unsigned long alloc_end = (unsigned long)table +
> + (PAGE_SIZE << order);
> + unsigned long used = (unsigned long)table +
> + PAGE_ALIGN(size);
> + while (used < alloc_end) {
> + free_page(used);
Isnt this going to interfere with the kernel_map_pages debug stuff?
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next prev parent reply other threads:[~2007-05-18 18:21 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-18 9:54 Eric Dumazet
2007-05-18 18:21 ` Christoph Lameter [this message]
2007-05-19 8:37 ` Andrew Morton
2007-05-19 18:07 ` Eric Dumazet
2007-05-19 18:54 ` David Miller, Eric Dumazet
2007-05-19 20:36 ` Eric Dumazet
2007-05-19 18:21 ` William Lee Irwin III
2007-05-19 18:41 ` Eric Dumazet
2007-05-21 8:11 ` William Lee Irwin III
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