diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/filemap.c | 14 | ||||
| -rw-r--r-- | mm/hugetlb.c | 7 | ||||
| -rw-r--r-- | mm/madvise.c | 4 | ||||
| -rw-r--r-- | mm/memcontrol.c | 3 | ||||
| -rw-r--r-- | mm/memory.c | 41 | ||||
| -rw-r--r-- | mm/migrate.c | 4 | ||||
| -rw-r--r-- | mm/mlock.c | 2 | ||||
| -rw-r--r-- | mm/mm_init.c | 8 | ||||
| -rw-r--r-- | mm/mmap.c | 2 | ||||
| -rw-r--r-- | mm/nommu.c | 21 | ||||
| -rw-r--r-- | mm/page_alloc.c | 17 | ||||
| -rw-r--r-- | mm/rmap.c | 5 | ||||
| -rw-r--r-- | mm/shmem.c | 4 | ||||
| -rw-r--r-- | mm/swap.c | 9 | ||||
| -rw-r--r-- | mm/swap_state.c | 8 | ||||
| -rw-r--r-- | mm/swapfile.c | 6 | ||||
| -rw-r--r-- | mm/truncate.c | 6 | ||||
| -rw-r--r-- | mm/vmscan.c | 8 |
18 files changed, 103 insertions, 66 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index 42bbc69..54e9686 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -558,14 +558,14 @@ EXPORT_SYMBOL(wait_on_page_bit); * But that's OK - sleepers in wait_on_page_writeback() just go back to sleep. * * The first mb is necessary to safely close the critical section opened by the - * TestSetPageLocked(), the second mb is necessary to enforce ordering between - * the clear_bit and the read of the waitqueue (to avoid SMP races with a - * parallel wait_on_page_locked()). + * test_and_set_bit() to lock the page; the second mb is necessary to enforce + * ordering between the clear_bit and the read of the waitqueue (to avoid SMP + * races with a parallel wait_on_page_locked()). */ void unlock_page(struct page *page) { smp_mb__before_clear_bit(); - if (!TestClearPageLocked(page)) + if (!test_and_clear_bit(PG_locked, &page->flags)) BUG(); smp_mb__after_clear_bit(); wake_up_page(page, PG_locked); @@ -931,7 +931,7 @@ grab_cache_page_nowait(struct address_space *mapping, pgoff_t index) struct page *page = find_get_page(mapping, index); if (page) { - if (!TestSetPageLocked(page)) + if (trylock_page(page)) return page; page_cache_release(page); return NULL; @@ -1027,7 +1027,7 @@ find_page: if (inode->i_blkbits == PAGE_CACHE_SHIFT || !mapping->a_ops->is_partially_uptodate) goto page_not_up_to_date; - if (TestSetPageLocked(page)) + if (!trylock_page(page)) goto page_not_up_to_date; if (!mapping->a_ops->is_partially_uptodate(page, desc, offset)) @@ -1879,7 +1879,7 @@ void iov_iter_advance(struct iov_iter *i, size_t bytes) * The !iov->iov_len check ensures we skip over unlikely * zero-length segments (without overruning the iovec). */ - while (bytes || unlikely(!iov->iov_len && i->count)) { + while (bytes || unlikely(i->count && !iov->iov_len)) { int copy; copy = min(bytes, iov->iov_len - base); diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 254ce2b..757ca98 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1283,7 +1283,12 @@ module_exit(hugetlb_exit); static int __init hugetlb_init(void) { - BUILD_BUG_ON(HPAGE_SHIFT == 0); + /* Some platform decide whether they support huge pages at boot + * time. On these, such as powerpc, HPAGE_SHIFT is set to 0 when + * there is no such support + */ + if (HPAGE_SHIFT == 0) + return 0; if (!size_to_hstate(default_hstate_size)) { default_hstate_size = HPAGE_SIZE; diff --git a/mm/madvise.c b/mm/madvise.c index 23a0ec3..f9349c1 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -132,10 +132,10 @@ static long madvise_willneed(struct vm_area_struct * vma, * Application no longer needs these pages. If the pages are dirty, * it's OK to just throw them away. The app will be more careful about * data it wants to keep. Be sure to free swap resources too. The - * zap_page_range call sets things up for refill_inactive to actually free + * zap_page_range call sets things up for shrink_active_list to actually free * these pages later if no one else has touched them in the meantime, * although we could add these pages to a global reuse list for - * refill_inactive to pick up before reclaiming other pages. + * shrink_active_list to pick up before reclaiming other pages. * * NB: This interface discards data rather than pushes it out to swap, * as some implementations do. This has performance implications for diff --git a/mm/memcontrol.c b/mm/memcontrol.c index fba566c..7056c3b 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1168,9 +1168,6 @@ static void mem_cgroup_move_task(struct cgroup_subsys *ss, mem = mem_cgroup_from_cont(cont); old_mem = mem_cgroup_from_cont(old_cont); - if (mem == old_mem) - goto out; - /* * Only thread group leaders are allowed to migrate, the mm_struct is * in effect owned by the leader diff --git a/mm/memory.c b/mm/memory.c index 67f0ab9..1002f47 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -994,6 +994,29 @@ unsigned long zap_page_range(struct vm_area_struct *vma, unsigned long address, return end; } +/** + * zap_vma_ptes - remove ptes mapping the vma + * @vma: vm_area_struct holding ptes to be zapped + * @address: starting address of pages to zap + * @size: number of bytes to zap + * + * This function only unmaps ptes assigned to VM_PFNMAP vmas. + * + * The entire address range must be fully contained within the vma. + * + * Returns 0 if successful. + */ +int zap_vma_ptes(struct vm_area_struct *vma, unsigned long address, + unsigned long size) +{ + if (address < vma->vm_start || address + size > vma->vm_end || + !(vma->vm_flags & VM_PFNMAP)) + return -1; + zap_page_range(vma, address, size, NULL); + return 0; +} +EXPORT_SYMBOL_GPL(zap_vma_ptes); + /* * Do a quick page-table lookup for a single page. */ @@ -1766,7 +1789,7 @@ static int do_wp_page(struct mm_struct *mm, struct vm_area_struct *vma, * not dirty accountable. */ if (PageAnon(old_page)) { - if (!TestSetPageLocked(old_page)) { + if (trylock_page(old_page)) { reuse = can_share_swap_page(old_page); unlock_page(old_page); } @@ -2742,16 +2765,26 @@ int make_pages_present(unsigned long addr, unsigned long end) vma = find_vma(current->mm, addr); if (!vma) - return -1; + return -ENOMEM; write = (vma->vm_flags & VM_WRITE) != 0; BUG_ON(addr >= end); BUG_ON(end > vma->vm_end); len = DIV_ROUND_UP(end, PAGE_SIZE) - addr/PAGE_SIZE; ret = get_user_pages(current, current->mm, addr, len, write, 0, NULL, NULL); - if (ret < 0) + if (ret < 0) { + /* + SUS require strange return value to mlock + - invalid addr generate to ENOMEM. + - out of memory should generate EAGAIN. + */ + if (ret == -EFAULT) + ret = -ENOMEM; + else if (ret == -ENOMEM) + ret = -EAGAIN; return ret; - return ret == len ? 0 : -1; + } + return ret == len ? 0 : -ENOMEM; } #if !defined(__HAVE_ARCH_GATE_AREA) diff --git a/mm/migrate.c b/mm/migrate.c index 153572f..2a80136 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -605,7 +605,7 @@ static int move_to_new_page(struct page *newpage, struct page *page) * establishing additional references. We are the only one * holding a reference to the new page at this point. */ - if (TestSetPageLocked(newpage)) + if (!trylock_page(newpage)) BUG(); /* Prepare mapping for the new page.*/ @@ -667,7 +667,7 @@ static int unmap_and_move(new_page_t get_new_page, unsigned long private, BUG_ON(charge); rc = -EAGAIN; - if (TestSetPageLocked(page)) { + if (!trylock_page(page)) { if (!force) goto move_newpage; lock_page(page); @@ -78,8 +78,6 @@ success: mm->locked_vm -= pages; out: - if (ret == -ENOMEM) - ret = -EAGAIN; return ret; } diff --git a/mm/mm_init.c b/mm/mm_init.c index c6af41e..936ef2e 100644 --- a/mm/mm_init.c +++ b/mm/mm_init.c @@ -14,6 +14,10 @@ #ifdef CONFIG_DEBUG_MEMORY_INIT int __meminitdata mminit_loglevel; +#ifndef SECTIONS_SHIFT +#define SECTIONS_SHIFT 0 +#endif + /* The zonelists are simply reported, validation is manual. */ void mminit_verify_zonelist(void) { @@ -74,11 +78,7 @@ void __init mminit_verify_pageflags_layout(void) NR_PAGEFLAGS); mminit_dprintk(MMINIT_TRACE, "pageflags_layout_shifts", "Section %d Node %d Zone %d\n", -#ifdef SECTIONS_SHIFT SECTIONS_SHIFT, -#else - 0, -#endif NODES_SHIFT, ZONES_SHIFT); mminit_dprintk(MMINIT_TRACE, "pageflags_layout_offsets", @@ -370,7 +370,7 @@ find_vma_prepare(struct mm_struct *mm, unsigned long addr, if (vma_tmp->vm_end > addr) { vma = vma_tmp; if (vma_tmp->vm_start <= addr) - return vma; + break; __rb_link = &__rb_parent->rb_left; } else { rb_prev = __rb_parent; @@ -266,6 +266,27 @@ void *vmalloc_node(unsigned long size, int node) } EXPORT_SYMBOL(vmalloc_node); +#ifndef PAGE_KERNEL_EXEC +# define PAGE_KERNEL_EXEC PAGE_KERNEL +#endif + +/** + * vmalloc_exec - allocate virtually contiguous, executable memory + * @size: allocation size + * + * Kernel-internal function to allocate enough pages to cover @size + * the page level allocator and map them into contiguous and + * executable kernel virtual space. + * + * For tight control over page level allocator and protection flags + * use __vmalloc() instead. + */ + +void *vmalloc_exec(unsigned long size) +{ + return __vmalloc(size, GFP_KERNEL | __GFP_HIGHMEM, PAGE_KERNEL_EXEC); +} + /** * vmalloc_32 - allocate virtually contiguous memory (32bit addressable) * @size: allocation size diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 3cf3d05..401d104 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -3753,23 +3753,6 @@ unsigned long __init find_min_pfn_with_active_regions(void) return find_min_pfn_for_node(MAX_NUMNODES); } -/** - * find_max_pfn_with_active_regions - Find the maximum PFN registered - * - * It returns the maximum PFN based on information provided via - * add_active_range(). - */ -unsigned long __init find_max_pfn_with_active_regions(void) -{ - int i; - unsigned long max_pfn = 0; - - for (i = 0; i < nr_nodemap_entries; i++) - max_pfn = max(max_pfn, early_node_map[i].end_pfn); - - return max_pfn; -} - /* * early_calculate_totalpages() * Sum pages in active regions for movable zone. @@ -422,7 +422,7 @@ int page_referenced(struct page *page, int is_locked, referenced += page_referenced_anon(page, mem_cont); else if (is_locked) referenced += page_referenced_file(page, mem_cont); - else if (TestSetPageLocked(page)) + else if (!trylock_page(page)) referenced++; else { if (page->mapping) @@ -667,7 +667,8 @@ void page_remove_rmap(struct page *page, struct vm_area_struct *vma) * Leaving it set also helps swapoff to reinstate ptes * faster for those pages still in swapcache. */ - if (page_test_dirty(page)) { + if ((!PageAnon(page) || PageSwapCache(page)) && + page_test_dirty(page)) { page_clear_dirty(page); set_page_dirty(page); } @@ -1265,7 +1265,7 @@ repeat: } /* We have to do this with page locked to prevent races */ - if (TestSetPageLocked(swappage)) { + if (!trylock_page(swappage)) { shmem_swp_unmap(entry); spin_unlock(&info->lock); wait_on_page_locked(swappage); @@ -1329,7 +1329,7 @@ repeat: shmem_swp_unmap(entry); filepage = find_get_page(mapping, idx); if (filepage && - (!PageUptodate(filepage) || TestSetPageLocked(filepage))) { + (!PageUptodate(filepage) || !trylock_page(filepage))) { spin_unlock(&info->lock); wait_on_page_locked(filepage); page_cache_release(filepage); @@ -278,9 +278,10 @@ int lru_add_drain_all(void) * Avoid taking zone->lru_lock if possible, but if it is taken, retain it * for the remainder of the operation. * - * The locking in this function is against shrink_cache(): we recheck the - * page count inside the lock to see whether shrink_cache grabbed the page - * via the LRU. If it did, give up: shrink_cache will free it. + * The locking in this function is against shrink_inactive_list(): we recheck + * the page count inside the lock to see whether shrink_inactive_list() + * grabbed the page via the LRU. If it did, give up: shrink_inactive_list() + * will free it. */ void release_pages(struct page **pages, int nr, int cold) { @@ -443,7 +444,7 @@ void pagevec_strip(struct pagevec *pvec) for (i = 0; i < pagevec_count(pvec); i++) { struct page *page = pvec->pages[i]; - if (PagePrivate(page) && !TestSetPageLocked(page)) { + if (PagePrivate(page) && trylock_page(page)) { if (PagePrivate(page)) try_to_release_page(page, 0); unlock_page(page); diff --git a/mm/swap_state.c b/mm/swap_state.c index b8035b0..167cf2d 100644 --- a/mm/swap_state.c +++ b/mm/swap_state.c @@ -201,7 +201,7 @@ void delete_from_swap_cache(struct page *page) */ static inline void free_swap_cache(struct page *page) { - if (PageSwapCache(page) && !TestSetPageLocked(page)) { + if (PageSwapCache(page) && trylock_page(page)) { remove_exclusive_swap_page(page); unlock_page(page); } @@ -302,9 +302,9 @@ struct page *read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask, * re-using the just freed swap entry for an existing page. * May fail (-ENOMEM) if radix-tree node allocation failed. */ - SetPageLocked(new_page); + set_page_locked(new_page); err = add_to_swap_cache(new_page, entry, gfp_mask & GFP_KERNEL); - if (!err) { + if (likely(!err)) { /* * Initiate read into locked page and return. */ @@ -312,7 +312,7 @@ struct page *read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask, swap_readpage(NULL, new_page); return new_page; } - ClearPageLocked(new_page); + clear_page_locked(new_page); swap_free(entry); } while (err != -ENOMEM); diff --git a/mm/swapfile.c b/mm/swapfile.c index 6beb625..1e330f2 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -403,7 +403,7 @@ void free_swap_and_cache(swp_entry_t entry) if (p) { if (swap_entry_free(p, swp_offset(entry)) == 1) { page = find_get_page(&swapper_space, entry.val); - if (page && unlikely(TestSetPageLocked(page))) { + if (page && unlikely(!trylock_page(page))) { page_cache_release(page); page = NULL; } @@ -656,8 +656,8 @@ static int unuse_mm(struct mm_struct *mm, if (!down_read_trylock(&mm->mmap_sem)) { /* - * Activate page so shrink_cache is unlikely to unmap its - * ptes while lock is dropped, so swapoff can make progress. + * Activate page so shrink_inactive_list is unlikely to unmap + * its ptes while lock is dropped, so swapoff can make progress. */ activate_page(page); unlock_page(page); diff --git a/mm/truncate.c b/mm/truncate.c index e68443d..2505050 100644 --- a/mm/truncate.c +++ b/mm/truncate.c @@ -104,7 +104,6 @@ truncate_complete_page(struct address_space *mapping, struct page *page) cancel_dirty_page(page, PAGE_CACHE_SIZE); remove_from_page_cache(page); - ClearPageUptodate(page); ClearPageMappedToDisk(page); page_cache_release(page); /* pagecache ref */ } @@ -188,7 +187,7 @@ void truncate_inode_pages_range(struct address_space *mapping, if (page_index > next) next = page_index; next++; - if (TestSetPageLocked(page)) + if (!trylock_page(page)) continue; if (PageWriteback(page)) { unlock_page(page); @@ -281,7 +280,7 @@ unsigned long __invalidate_mapping_pages(struct address_space *mapping, pgoff_t index; int lock_failed; - lock_failed = TestSetPageLocked(page); + lock_failed = !trylock_page(page); /* * We really shouldn't be looking at the ->index of an @@ -356,7 +355,6 @@ invalidate_complete_page2(struct address_space *mapping, struct page *page) BUG_ON(PagePrivate(page)); __remove_from_page_cache(page); spin_unlock_irq(&mapping->tree_lock); - ClearPageUptodate(page); page_cache_release(page); /* pagecache ref */ return 1; failed: diff --git a/mm/vmscan.c b/mm/vmscan.c index 8f71761..1ff1a58 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -496,7 +496,7 @@ static unsigned long shrink_page_list(struct list_head *page_list, page = lru_to_page(page_list); list_del(&page->lru); - if (TestSetPageLocked(page)) + if (!trylock_page(page)) goto keep; VM_BUG_ON(PageActive(page)); @@ -582,7 +582,7 @@ static unsigned long shrink_page_list(struct list_head *page_list, * A synchronous write - probably a ramdisk. Go * ahead and try to reclaim the page. */ - if (TestSetPageLocked(page)) + if (!trylock_page(page)) goto keep; if (PageDirty(page) || PageWriteback(page)) goto keep_locked; @@ -1408,7 +1408,7 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist, if (sc->nr_scanned && priority < DEF_PRIORITY - 2) congestion_wait(WRITE, HZ/10); } - /* top priority shrink_caches still had more to do? don't OOM, then */ + /* top priority shrink_zones still had more to do? don't OOM, then */ if (!sc->all_unreclaimable && scan_global_lru(sc)) ret = nr_reclaimed; out: @@ -1979,7 +1979,7 @@ module_init(kswapd_init) int zone_reclaim_mode __read_mostly; #define RECLAIM_OFF 0 -#define RECLAIM_ZONE (1<<0) /* Run shrink_cache on the zone */ +#define RECLAIM_ZONE (1<<0) /* Run shrink_inactive_list on the zone */ #define RECLAIM_WRITE (1<<1) /* Writeout pages during reclaim */ #define RECLAIM_SWAP (1<<2) /* Swap pages out during reclaim */ |
