diff options
| author | Andrew Morton <akpm@zip.com.au> | 2002-08-27 21:03:50 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@penguin.transmeta.com> | 2002-08-27 21:03:50 -0700 |
| commit | a8382cf1153689a1caac0e707e951e7869bb92e1 (patch) | |
| tree | 71e2722fd8fd5e08fb7862171f8fdb1443ce31c6 /include | |
| parent | e6f0e61d9ed94134f57bcf6c72b81848b9d3c2fe (diff) | |
[PATCH] per-zone LRU locking
Now the LRUs are per-zone, make their lock per-zone as well.
In this patch the per-zone lock shares a cacheline with the zone's
buddy list lock, which is very bad. Some groundwork is needed to fix
this well.
This change is expected to be a significant win on NUMA, where most
page allocation comes from the local node's zones.
For NUMA the `struct zone' itself should really be placed in that
node's memory, which is something the platform owners should look at.
However the internode cache will help here.
Per-node kswapd would make heaps of sense too.
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mm.h | 2 | ||||
| -rw-r--r-- | include/linux/mmzone.h | 1 | ||||
| -rw-r--r-- | include/linux/page-flags.h | 2 | ||||
| -rw-r--r-- | include/linux/swap.h | 2 |
4 files changed, 3 insertions, 4 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 7416dae6b550..045a861e4024 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -157,7 +157,7 @@ struct page { struct address_space *mapping; /* The inode (or ...) we belong to. */ unsigned long index; /* Our offset within mapping. */ struct list_head lru; /* Pageout list, eg. active_list; - protected by pagemap_lru_lock !! */ + protected by zone->lru_lock !! */ union { struct pte_chain * chain; /* Reverse pte mapping pointer. * protected by PG_chainlock */ diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 928000348e6b..f62e36b902a2 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -44,6 +44,7 @@ struct zone { unsigned long pages_min, pages_low, pages_high; int need_balance; + spinlock_t lru_lock; struct list_head active_list; struct list_head inactive_list; atomic_t refill_counter; diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index cc74c699f3ad..5a49020e728b 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -28,7 +28,7 @@ * * Note that the referenced bit, the page->lru list_head and the active, * inactive_dirty and inactive_clean lists are protected by the - * pagemap_lru_lock, and *NOT* by the usual PG_locked bit! + * zone->lru_lock, and *NOT* by the usual PG_locked bit! * * PG_error is set to indicate that an I/O error occurred on this page. * diff --git a/include/linux/swap.h b/include/linux/swap.h index d9a4a9dc00ce..affa89d77eb1 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -209,8 +209,6 @@ extern struct swap_list_t swap_list; asmlinkage long sys_swapoff(const char *); asmlinkage long sys_swapon(const char *, int); -extern spinlock_t _pagemap_lru_lock; - extern void FASTCALL(mark_page_accessed(struct page *)); extern spinlock_t swaplock; |