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Date: Tue, 28 Feb 2012 10:04:06 +0400
From: Konstantin Khlebnikov <khlebnikov@...nvz.org>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
CC: Hugh Dickins <hughd@...gle.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-mm@...ck.org" <linux-mm@...ck.org>,
Johannes Weiner <hannes@...xchg.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Andi Kleen <andi@...stfloor.org>
Subject: Re: [PATCH v3 05/21] mm: rename lruvec->lists into lruvec->pages_lru
KAMEZAWA Hiroyuki wrote:
> On Thu, 23 Feb 2012 17:52:00 +0400
> Konstantin Khlebnikov<khlebnikov@...nvz.org> wrote:
>
>> This is much more unique and grep-friendly name.
>>
>> Signed-off-by: Konstantin Khlebnikov<khlebnikov@...nvz.org>
>
> I worries this kind of change can cause many hunks and make merging difficult..
> But this seems not very destructive..
>
> Reviewed-by: KAMEZAWA Hiroyuki<kamezawa.hiroyu@...fujitsu.com>
>
> I have no strong opinions to this naming. How other mm developpers think ?
>
> I personally think making this kind of changes in the head of patch set tend do
> make it difficult to merge full sets of patche series.
This rename allows to easily highlight lru-lists manipulations,
because some of them are in non-trivial places.
>
> Thanks,
> -Kame
>
>> ---
>> include/linux/mm_inline.h | 2 +-
>> include/linux/mmzone.h | 2 +-
>> mm/memcontrol.c | 6 +++---
>> mm/page_alloc.c | 2 +-
>> mm/swap.c | 4 ++--
>> mm/vmscan.c | 6 +++---
>> 6 files changed, 11 insertions(+), 11 deletions(-)
>>
>> diff --git a/include/linux/mm_inline.h b/include/linux/mm_inline.h
>> index 227fd3e..8415596 100644
>> --- a/include/linux/mm_inline.h
>> +++ b/include/linux/mm_inline.h
>> @@ -27,7 +27,7 @@ add_page_to_lru_list(struct zone *zone, struct page *page, enum lru_list lru)
>> struct lruvec *lruvec;
>>
>> lruvec = mem_cgroup_lru_add_list(zone, page, lru);
>> - list_add(&page->lru,&lruvec->lists[lru]);
>> + list_add(&page->lru,&lruvec->pages_lru[lru]);
>> __mod_zone_page_state(zone, NR_LRU_BASE + lru, hpage_nr_pages(page));
>> }
>>
>> diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
>> index 3e1f7ff..ddd0fd2 100644
>> --- a/include/linux/mmzone.h
>> +++ b/include/linux/mmzone.h
>> @@ -160,7 +160,7 @@ static inline int is_unevictable_lru(enum lru_list lru)
>> }
>>
>> struct lruvec {
>> - struct list_head lists[NR_LRU_LISTS];
>> + struct list_head pages_lru[NR_LRU_LISTS];
>> };
>>
>> /* Mask used at gathering information at once (see memcontrol.c) */
>> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
>> index 77f5d48..8f8c7c4 100644
>> --- a/mm/memcontrol.c
>> +++ b/mm/memcontrol.c
>> @@ -1050,7 +1050,7 @@ struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone,
>> * the lruvec for the given @zone and the memcg @page is charged to.
>> *
>> * The callsite is then responsible for physically linking the page to
>> - * the returned lruvec->lists[@lru].
>> + * the returned lruvec->pages_lru[@lru].
>> */
>> struct lruvec *mem_cgroup_lru_add_list(struct zone *zone, struct page *page,
>> enum lru_list lru)
>> @@ -3592,7 +3592,7 @@ static int mem_cgroup_force_empty_list(struct mem_cgroup *memcg,
>>
>> zone =&NODE_DATA(node)->node_zones[zid];
>> mz = mem_cgroup_zoneinfo(memcg, node, zid);
>> - list =&mz->lruvec.lists[lru];
>> + list =&mz->lruvec.pages_lru[lru];
>>
>> loop = mz->lru_size[lru];
>> /* give some margin against EBUSY etc...*/
>> @@ -4716,7 +4716,7 @@ static int alloc_mem_cgroup_per_zone_info(struct mem_cgroup *memcg, int node)
>> for (zone = 0; zone< MAX_NR_ZONES; zone++) {
>> mz =&pn->zoneinfo[zone];
>> for_each_lru(lru)
>> - INIT_LIST_HEAD(&mz->lruvec.lists[lru]);
>> + INIT_LIST_HEAD(&mz->lruvec.pages_lru[lru]);
>> mz->usage_in_excess = 0;
>> mz->on_tree = false;
>> mz->memcg = memcg;
>> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
>> index 38f6744..5f19392 100644
>> --- a/mm/page_alloc.c
>> +++ b/mm/page_alloc.c
>> @@ -4363,7 +4363,7 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat,
>>
>> zone_pcp_init(zone);
>> for_each_lru(lru)
>> - INIT_LIST_HEAD(&zone->lruvec.lists[lru]);
>> + INIT_LIST_HEAD(&zone->lruvec.pages_lru[lru]);
>> zone->reclaim_stat.recent_rotated[0] = 0;
>> zone->reclaim_stat.recent_rotated[1] = 0;
>> zone->reclaim_stat.recent_scanned[0] = 0;
>> diff --git a/mm/swap.c b/mm/swap.c
>> index fff1ff7..17993c0 100644
>> --- a/mm/swap.c
>> +++ b/mm/swap.c
>> @@ -238,7 +238,7 @@ static void pagevec_move_tail_fn(struct page *page, void *arg)
>>
>> lruvec = mem_cgroup_lru_move_lists(page_zone(page),
>> page, lru, lru);
>> - list_move_tail(&page->lru,&lruvec->lists[lru]);
>> + list_move_tail(&page->lru,&lruvec->pages_lru[lru]);
>> (*pgmoved)++;
>> }
>> }
>> @@ -482,7 +482,7 @@ static void lru_deactivate_fn(struct page *page, void *arg)
>> * We moves tha page into tail of inactive.
>> */
>> lruvec = mem_cgroup_lru_move_lists(zone, page, lru, lru);
>> - list_move_tail(&page->lru,&lruvec->lists[lru]);
>> + list_move_tail(&page->lru,&lruvec->pages_lru[lru]);
>> __count_vm_event(PGROTATED);
>> }
>>
>> diff --git a/mm/vmscan.c b/mm/vmscan.c
>> index 8b59cb5..e41ad52 100644
>> --- a/mm/vmscan.c
>> +++ b/mm/vmscan.c
>> @@ -1164,7 +1164,7 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan,
>> lru += LRU_ACTIVE;
>> if (file)
>> lru += LRU_FILE;
>> - src =&lruvec->lists[lru];
>> + src =&lruvec->pages_lru[lru];
>>
>> for (scan = 0; scan< nr_to_scan&& !list_empty(src); scan++) {
>> struct page *page;
>> @@ -1663,7 +1663,7 @@ static void move_active_pages_to_lru(struct zone *zone,
>> SetPageLRU(page);
>>
>> lruvec = mem_cgroup_lru_add_list(zone, page, lru);
>> - list_move(&page->lru,&lruvec->lists[lru]);
>> + list_move(&page->lru,&lruvec->pages_lru[lru]);
>> pgmoved += hpage_nr_pages(page);
>>
>> if (put_page_testzero(page)) {
>> @@ -3592,7 +3592,7 @@ void check_move_unevictable_pages(struct page **pages, int nr_pages)
>> __dec_zone_state(zone, NR_UNEVICTABLE);
>> lruvec = mem_cgroup_lru_move_lists(zone, page,
>> LRU_UNEVICTABLE, lru);
>> - list_move(&page->lru,&lruvec->lists[lru]);
>> + list_move(&page->lru,&lruvec->pages_lru[lru]);
>> __inc_zone_state(zone, NR_INACTIVE_ANON + lru);
>> pgrescued++;
>> }
>>
>> --
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