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| author | Nick Piggin <npiggin@suse.de> | 2006-03-22 00:08:32 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-22 07:54:01 -0800 |
| commit | 20aaffd6a6492a5f7975dd7be967cdf0e4d978c4 (patch) | |
| tree | b6202e19d2c42dfcc7bbb6c266034e695adac137 /arch | |
| parent | 84d1c054b1c408c6c92676069fa678d55d5f0033 (diff) | |
| download | linux-20aaffd6a6492a5f7975dd7be967cdf0e4d978c4.tar.gz | |
[PATCH] x86_64: pageattr use single list
Use page->lru.next to implement the singly linked list of pages rather than
the struct deferred_page which needs to be allocated and freed for each
page.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86_64/mm/pageattr.c | 42 |
1 files changed, 14 insertions, 28 deletions
diff --git a/arch/x86_64/mm/pageattr.c b/arch/x86_64/mm/pageattr.c index 35f1f1aab0638a..efe5af14c7db1f 100644 --- a/arch/x86_64/mm/pageattr.c +++ b/arch/x86_64/mm/pageattr.c @@ -77,26 +77,12 @@ static inline void flush_map(unsigned long address) on_each_cpu(flush_kernel_map, (void *)address, 1, 1); } -struct deferred_page { - struct deferred_page *next; - struct page *fpage; - unsigned long address; -}; -static struct deferred_page *df_list; /* protected by init_mm.mmap_sem */ - -static inline void save_page(unsigned long address, struct page *fpage) +static struct page *deferred_pages; /* protected by init_mm.mmap_sem */ + +static inline void save_page(struct page *fpage) { - struct deferred_page *df; - df = kmalloc(sizeof(struct deferred_page), GFP_KERNEL); - if (!df) { - flush_map(address); - __free_page(fpage); - } else { - df->next = df_list; - df->fpage = fpage; - df->address = address; - df_list = df; - } + fpage->lru.next = (struct list_head *)deferred_pages; + deferred_pages = fpage; } /* @@ -163,7 +149,7 @@ __change_page_attr(unsigned long address, unsigned long pfn, pgprot_t prot, switch (page_count(kpte_page)) { case 1: - save_page(address, kpte_page); + save_page(kpte_page); revert_page(address, ref_prot); break; case 0: @@ -220,17 +206,17 @@ int change_page_attr(struct page *page, int numpages, pgprot_t prot) void global_flush_tlb(void) { - struct deferred_page *df, *next_df; + struct page *dpage; down_read(&init_mm.mmap_sem); - df = xchg(&df_list, NULL); + dpage = xchg(&deferred_pages, NULL); up_read(&init_mm.mmap_sem); - flush_map((df && !df->next) ? df->address : 0); - for (; df; df = next_df) { - next_df = df->next; - if (df->fpage) - __free_page(df->fpage); - kfree(df); + + flush_map((dpage && !dpage->lru.next) ? (unsigned long)page_address(dpage) : 0); + while (dpage) { + struct page *tmp = dpage; + dpage = (struct page *)dpage->lru.next; + __free_page(tmp); } } |