diff options
| author | Andrew Morton <akpm@zip.com.au> | 2002-05-19 02:23:27 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@conectiva.com.br> | 2002-05-19 02:23:27 -0700 |
| commit | a25364526006361b7e7e011ce488cb46e89dd3ef (patch) | |
| tree | 3ff05b46aaeb9b8c47c413b7f462d2a047d9ba10 /include/linux | |
| parent | 5409c2b52ffea911ba1e47b5cbf8d911efb5d0c6 (diff) | |
[PATCH] remove PG_launder
Removal of PG_launder.
It's not obvious (to me) why this ever existed. If it's to prevent
deadlocks then I'd like to know who was performing __GFP_FS allocations
while holding a page lock?
But in 2.5, the only memory allocations which are performed when the
caller holds PG_writeback against an unsubmitted page are those which
occur inside submit_bh(). There will be no __GFS_FS allocations in
that call chain.
Removing PG_launder means that memory allocators can block on any
PageWriteback() page at all, which reduces the risk of very long list
walks inside pagemap_lru_lock in shrink_cache().
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/page-flags.h | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index f56db65ebef3..52b7117c4f64 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -62,9 +62,8 @@ #define PG_arch_1 10 #define PG_reserved 11 -#define PG_launder 12 /* written out by VM pressure.. */ -#define PG_private 13 /* Has something at ->private */ -#define PG_writeback 14 /* Page is under writeback */ +#define PG_private 12 /* Has something at ->private */ +#define PG_writeback 13 /* Page is under writeback */ /* * Global page accounting. One instance per CPU. @@ -172,10 +171,6 @@ extern void get_page_state(struct page_state *ret); #define SetPageReserved(page) set_bit(PG_reserved, &(page)->flags) #define ClearPageReserved(page) clear_bit(PG_reserved, &(page)->flags) -#define PageLaunder(page) test_bit(PG_launder, &(page)->flags) -#define SetPageLaunder(page) set_bit(PG_launder, &(page)->flags) -#define ClearPageLaunder(page) clear_bit(PG_launder, &(page)->flags) - #define SetPagePrivate(page) set_bit(PG_private, &(page)->flags) #define ClearPagePrivate(page) clear_bit(PG_private, &(page)->flags) #define PagePrivate(page) test_bit(PG_private, &(page)->flags) |