From: Hiroyuki KAMEZAWA <kamezawa.hiroyu@jp.fujitsu.com>
To: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
Cc: linux-mm@kvack.org, akpm@osdl.org,
Nick Piggin <piggin@cyberone.com.au>,
arjanv@redhat.com, linux-kernel@vger.kernel.org
Subject: Re: [RFC] memory defragmentation to satisfy high order allocations
Date: Mon, 04 Oct 2004 11:38:32 +0900 [thread overview]
Message-ID: <4160B7A8.7010607@jp.fujitsu.com> (raw)
In-Reply-To: <20041001182221.GA3191@logos.cnet>
how about inserting this if-sentense ?
-- Kame
Marcelo Tosatti wrote:
> +int coalesce_memory(unsigned int order, struct zone *zone)
> +{
<snip>
> + while (entry != &area->free_list) {
> + int ret;
> + page = list_entry(entry, struct page, lru);
> + entry = entry->next;
> +
+ if (((page_to_pfn(page) - zone->zone_start_pfn) & (1 << toorder)) {
> + pwalk = page;
> +
> + /* Look backwards */
> +
> + for (walkcount = 1; walkcount<nr_pages; walkcount++) {
..................
> + }
> +
+ } else {
> +forward:
> +
> + pwalk = page;
> +
> + /* Look forward, skipping the page frames from this
> + high order page we are looking at */
> +
> + for (walkcount = (1UL << torder); walkcount<nr_pages;
> + walkcount++) {
> + pwalk = page+walkcount;
> +
> + ret = can_move_page(pwalk);
> +
> + if (ret)
> + nr_freed_pages++;
> + else
> + goto loopey;
> +
> + if (nr_freed_pages == nr_pages)
> + goto success;
> + }
> +
+ }
WARNING: multiple messages have this Message-ID (diff)
From: Hiroyuki KAMEZAWA <kamezawa.hiroyu@jp.fujitsu.com>
To: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
Cc: linux-mm@kvack.org, akpm@osdl.org,
Nick Piggin <piggin@cyberone.com.au>,
arjanv@redhat.com, linux-kernel@vger.kernel.org
Subject: Re: [RFC] memory defragmentation to satisfy high order allocations
Date: Mon, 04 Oct 2004 11:38:32 +0900 [thread overview]
Message-ID: <4160B7A8.7010607@jp.fujitsu.com> (raw)
In-Reply-To: <20041001182221.GA3191@logos.cnet>
how about inserting this if-sentense ?
-- Kame
Marcelo Tosatti wrote:
> +int coalesce_memory(unsigned int order, struct zone *zone)
> +{
<snip>
> + while (entry != &area->free_list) {
> + int ret;
> + page = list_entry(entry, struct page, lru);
> + entry = entry->next;
> +
+ if (((page_to_pfn(page) - zone->zone_start_pfn) & (1 << toorder)) {
> + pwalk = page;
> +
> + /* Look backwards */
> +
> + for (walkcount = 1; walkcount<nr_pages; walkcount++) {
..................
> + }
> +
+ } else {
> +forward:
> +
> + pwalk = page;
> +
> + /* Look forward, skipping the page frames from this
> + high order page we are looking at */
> +
> + for (walkcount = (1UL << torder); walkcount<nr_pages;
> + walkcount++) {
> + pwalk = page+walkcount;
> +
> + ret = can_move_page(pwalk);
> +
> + if (ret)
> + nr_freed_pages++;
> + else
> + goto loopey;
> +
> + if (nr_freed_pages == nr_pages)
> + goto success;
> + }
> +
+ }
--
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next prev parent reply other threads:[~2004-10-04 2:33 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-01 18:22 [RFC] memory defragmentation to satisfy high order allocations Marcelo Tosatti
2004-10-01 18:22 ` Marcelo Tosatti
2004-10-01 20:11 ` Andrew Morton
2004-10-01 20:11 ` Andrew Morton
2004-10-01 19:04 ` Marcelo Tosatti
2004-10-01 19:04 ` Marcelo Tosatti
2004-10-01 21:00 ` Andrew Morton
2004-10-01 21:00 ` Andrew Morton
2004-10-01 21:57 ` Dave Hansen
2004-10-01 21:57 ` Dave Hansen
2004-10-01 23:42 ` Marcelo Tosatti
2004-10-01 23:42 ` Marcelo Tosatti
2004-10-02 1:17 ` Andrew Morton
2004-10-02 1:17 ` Andrew Morton
2004-10-02 9:30 ` Hirokazu Takahashi
2004-10-02 9:30 ` Hirokazu Takahashi
2004-10-02 18:33 ` Marcelo Tosatti
2004-10-02 18:33 ` Marcelo Tosatti
2004-10-03 4:13 ` Hirokazu Takahashi
2004-10-03 4:13 ` Hirokazu Takahashi
2004-10-03 14:07 ` Marcelo Tosatti
2004-10-03 14:07 ` Marcelo Tosatti
2004-10-03 18:35 ` Hirokazu Takahashi
2004-10-03 18:35 ` Hirokazu Takahashi
2004-10-03 19:21 ` Trond Myklebust
2004-10-03 19:21 ` Trond Myklebust
2004-10-03 20:03 ` Hirokazu Takahashi
2004-10-03 20:03 ` Hirokazu Takahashi
2004-10-03 20:44 ` Trond Myklebust
2004-10-03 20:44 ` Trond Myklebust
2004-10-04 13:02 ` Hirokazu Takahashi
2004-10-04 13:02 ` Hirokazu Takahashi
2004-10-04 17:24 ` Marcelo Tosatti
2004-10-04 17:24 ` Marcelo Tosatti
2004-10-05 2:53 ` Hirokazu Takahashi
2004-10-05 2:53 ` Hirokazu Takahashi
2004-10-07 12:06 ` Marcelo Tosatti
2004-10-08 7:00 ` Hirokazu Takahashi
2004-10-08 10:00 ` Marcelo Tosatti
2004-10-08 12:23 ` Hirokazu Takahashi
2004-10-08 12:41 ` Marcelo Tosatti
2004-10-08 16:52 ` Hirokazu Takahashi
2004-10-08 15:36 ` Marcelo Tosatti
2004-10-12 10:56 ` IWAMOTO Toshihiro
2004-10-12 10:35 ` Marcelo Tosatti
2004-10-12 17:55 ` Hirokazu Takahashi
2004-10-12 14:26 ` Martin J. Bligh
2004-10-12 12:17 ` Marcelo Tosatti
2004-10-12 15:01 ` Dave Hansen
2004-10-04 3:24 ` IWAMOTO Toshihiro
2004-10-04 3:24 ` IWAMOTO Toshihiro
2004-10-04 2:22 ` Dave Hansen
2004-10-04 2:22 ` Dave Hansen
2004-10-05 16:46 ` [PATCH] mhp: transfer dirty tag at radix_tree_replace Marcelo Tosatti
2004-10-05 18:35 ` Dave Hansen
2004-10-06 7:39 ` Hirokazu Takahashi
2004-10-08 8:15 ` Hirokazu Takahashi
2004-10-08 20:36 ` Marcelo Tosatti
2004-10-04 4:09 ` [RFC] memory defragmentation to satisfy high order allocations IWAMOTO Toshihiro
2004-10-04 4:09 ` IWAMOTO Toshihiro
2004-10-04 17:29 ` Marcelo Tosatti
2004-10-04 17:29 ` Marcelo Tosatti
2004-10-02 2:30 ` Nick Piggin
2004-10-02 2:30 ` Nick Piggin
2004-10-02 3:08 ` Marcelo Tosatti
2004-10-02 3:08 ` Marcelo Tosatti
2004-10-04 8:15 ` Nick Piggin
2004-10-04 8:15 ` Nick Piggin
2004-10-02 2:41 ` Nick Piggin
2004-10-02 2:41 ` Nick Piggin
2004-10-02 3:50 ` Hirokazu Takahashi
2004-10-02 3:50 ` Hirokazu Takahashi
2004-10-02 16:06 ` Marcelo Tosatti
2004-10-02 16:06 ` Marcelo Tosatti
2004-10-04 2:38 ` Hiroyuki KAMEZAWA [this message]
2004-10-04 2:38 ` Hiroyuki KAMEZAWA
2004-10-04 17:32 ` Marcelo Tosatti
2004-10-04 17:32 ` Marcelo Tosatti
2004-10-04 6:58 ` Hiroyuki KAMEZAWA
2004-10-04 6:58 ` Hiroyuki KAMEZAWA
2004-10-07 15:58 ` memory hotplug and mem= Marcelo Tosatti
2004-10-07 18:36 ` Dave Hansen
2004-10-07 17:01 ` Marcelo Tosatti
2004-10-07 19:10 ` Dave Hansen
2004-10-07 20:25 ` Dave Hansen
-- strict thread matches above, loose matches on Subject: below --
2004-10-11 16:40 [RFC] memory defragmentation to satisfy high order allocations linux
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