diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/bootmem.c | 25 | ||||
| -rw-r--r-- | mm/filemap.c | 20 | ||||
| -rw-r--r-- | mm/fremap.c | 2 | ||||
| -rw-r--r-- | mm/highmem.c | 30 | ||||
| -rw-r--r-- | mm/memcontrol.c | 2 | ||||
| -rw-r--r-- | mm/oom_kill.c | 9 | ||||
| -rw-r--r-- | mm/pagewalk.c | 10 | ||||
| -rw-r--r-- | mm/readahead.c | 5 | ||||
| -rw-r--r-- | mm/rmap.c | 13 | ||||
| -rw-r--r-- | mm/shmem.c | 25 | ||||
| -rw-r--r-- | mm/slab.c | 5 | ||||
| -rw-r--r-- | mm/slub.c | 12 | ||||
| -rw-r--r-- | mm/swap.c | 5 | ||||
| -rw-r--r-- | mm/swap_state.c | 2 | ||||
| -rw-r--r-- | mm/tiny-shmem.c | 8 | ||||
| -rw-r--r-- | mm/vmalloc.c | 6 | ||||
| -rw-r--r-- | mm/vmscan.c | 27 |
17 files changed, 127 insertions, 79 deletions
diff --git a/mm/bootmem.c b/mm/bootmem.c index f6ff4337b42..2ccea700968 100644 --- a/mm/bootmem.c +++ b/mm/bootmem.c @@ -125,6 +125,7 @@ static int __init reserve_bootmem_core(bootmem_data_t *bdata, BUG_ON(!size); BUG_ON(PFN_DOWN(addr) >= bdata->node_low_pfn); BUG_ON(PFN_UP(addr + size) > bdata->node_low_pfn); + BUG_ON(addr < bdata->node_boot_start); sidx = PFN_DOWN(addr - bdata->node_boot_start); eidx = PFN_UP(addr + size - bdata->node_boot_start); @@ -156,21 +157,31 @@ static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr, unsigned long sidx, eidx; unsigned long i; + BUG_ON(!size); + + /* out range */ + if (addr + size < bdata->node_boot_start || + PFN_DOWN(addr) > bdata->node_low_pfn) + return; /* * round down end of usable mem, partially free pages are * considered reserved. */ - BUG_ON(!size); - BUG_ON(PFN_DOWN(addr + size) > bdata->node_low_pfn); - if (addr < bdata->last_success) + if (addr >= bdata->node_boot_start && addr < bdata->last_success) bdata->last_success = addr; /* - * Round up the beginning of the address. + * Round up to index to the range. */ - sidx = PFN_UP(addr) - PFN_DOWN(bdata->node_boot_start); + if (PFN_UP(addr) > PFN_DOWN(bdata->node_boot_start)) + sidx = PFN_UP(addr) - PFN_DOWN(bdata->node_boot_start); + else + sidx = 0; + eidx = PFN_DOWN(addr + size - bdata->node_boot_start); + if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start)) + eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start); for (i = sidx; i < eidx; i++) { if (unlikely(!test_and_clear_bit(i, bdata->node_bootmem_map))) @@ -421,7 +432,9 @@ int __init reserve_bootmem(unsigned long addr, unsigned long size, void __init free_bootmem(unsigned long addr, unsigned long size) { - free_bootmem_core(NODE_DATA(0)->bdata, addr, size); + bootmem_data_t *bdata; + list_for_each_entry(bdata, &bdata_list, list) + free_bootmem_core(bdata, addr, size); } unsigned long __init free_all_bootmem(void) diff --git a/mm/filemap.c b/mm/filemap.c index df343d1e634..07e9d9258b4 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -343,7 +343,7 @@ int sync_page_range(struct inode *inode, struct address_space *mapping, EXPORT_SYMBOL(sync_page_range); /** - * sync_page_range_nolock + * sync_page_range_nolock - write & wait on all pages in the passed range without locking * @inode: target inode * @mapping: target address_space * @pos: beginning offset in pages to write @@ -611,7 +611,10 @@ int __lock_page_killable(struct page *page) sync_page_killable, TASK_KILLABLE); } -/* +/** + * __lock_page_nosync - get a lock on the page, without calling sync_page() + * @page: the page to lock + * * Variant of lock_page that does not require the caller to hold a reference * on the page's mapping. */ @@ -1538,9 +1541,20 @@ repeat: return page; } -/* +/** + * read_cache_page_async - read into page cache, fill it if needed + * @mapping: the page's address_space + * @index: the page index + * @filler: function to perform the read + * @data: destination for read data + * * Same as read_cache_page, but don't wait for page to become unlocked * after submitting it to the filler. + * + * Read into the page cache. If a page already exists, and PageUptodate() is + * not set, try to fill the page but don't wait for it to become unlocked. + * + * If the page does not get brought uptodate, return -EIO. */ struct page *read_cache_page_async(struct address_space *mapping, pgoff_t index, diff --git a/mm/fremap.c b/mm/fremap.c index 69a37c2bdf8..07a9c82ce1a 100644 --- a/mm/fremap.c +++ b/mm/fremap.c @@ -113,7 +113,7 @@ static int populate_range(struct mm_struct *mm, struct vm_area_struct *vma, * mmap()/mremap() it does not create any new vmas. The new mappings are * also safe across swapout. * - * NOTE: the 'prot' parameter right now is ignored (but must be zero), + * NOTE: the @prot parameter right now is ignored (but must be zero), * and the vma's default protection is used. Arbitrary protections * might be implemented in the future. */ diff --git a/mm/highmem.c b/mm/highmem.c index 35d47733cde..7da4a7b6af1 100644 --- a/mm/highmem.c +++ b/mm/highmem.c @@ -104,8 +104,9 @@ static void flush_all_zero_pkmaps(void) flush_tlb_kernel_range(PKMAP_ADDR(0), PKMAP_ADDR(LAST_PKMAP)); } -/* Flush all unused kmap mappings in order to remove stray - mappings. */ +/** + * kmap_flush_unused - flush all unused kmap mappings in order to remove stray mappings + */ void kmap_flush_unused(void) { spin_lock(&kmap_lock); @@ -163,6 +164,14 @@ start: return vaddr; } +/** + * kmap_high - map a highmem page into memory + * @page: &struct page to map + * + * Returns the page's virtual memory address. + * + * We cannot call this from interrupts, as it may block. + */ void *kmap_high(struct page *page) { unsigned long vaddr; @@ -170,8 +179,6 @@ void *kmap_high(struct page *page) /* * For highmem pages, we can't trust "virtual" until * after we have the lock. - * - * We cannot call this from interrupts, as it may block */ spin_lock(&kmap_lock); vaddr = (unsigned long)page_address(page); @@ -185,6 +192,10 @@ void *kmap_high(struct page *page) EXPORT_SYMBOL(kmap_high); +/** + * kunmap_high - map a highmem page into memory + * @page: &struct page to unmap + */ void kunmap_high(struct page *page) { unsigned long vaddr; @@ -259,6 +270,12 @@ static struct page_address_slot *page_slot(struct page *page) return &page_address_htable[hash_ptr(page, PA_HASH_ORDER)]; } +/** + * page_address - get the mapped virtual address of a page + * @page: &struct page to get the virtual address of + * + * Returns the page's virtual address. + */ void *page_address(struct page *page) { unsigned long flags; @@ -288,6 +305,11 @@ done: EXPORT_SYMBOL(page_address); +/** + * set_page_address - set a page's virtual address + * @page: &struct page to set + * @virtual: virtual address to use + */ void set_page_address(struct page *page, void *virtual) { unsigned long flags; diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 8b9f6cae938..9b648bd6345 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1079,7 +1079,7 @@ static void mem_cgroup_move_task(struct cgroup_subsys *ss, * Only thread group leaders are allowed to migrate, the mm_struct is * in effect owned by the leader */ - if (p->tgid != p->pid) + if (!thread_group_leader(p)) goto out; css_get(&mem->css); diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 44b2da11bf4..f255eda693b 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -37,6 +37,7 @@ static DEFINE_SPINLOCK(zone_scan_mutex); * badness - calculate a numeric value for how bad this task has been * @p: task struct of which task we should calculate * @uptime: current uptime in seconds + * @mem: target memory controller * * The formula used is relatively simple and documented inline in the * function. The main rationale is that we want to select a good task @@ -264,6 +265,9 @@ static struct task_struct *select_bad_process(unsigned long *ppoints, } /** + * dump_tasks - dump current memory state of all system tasks + * @mem: target memory controller + * * Dumps the current memory state of all system tasks, excluding kernel threads. * State information includes task's pid, uid, tgid, vm size, rss, cpu, oom_adj * score, and name. @@ -298,7 +302,7 @@ static void dump_tasks(const struct mem_cgroup *mem) } while_each_thread(g, p); } -/** +/* * Send SIGKILL to the selected process irrespective of CAP_SYS_RAW_IO * flag though it's unlikely that we select a process with CAP_SYS_RAW_IO * set. @@ -504,6 +508,9 @@ void clear_zonelist_oom(struct zonelist *zonelist) /** * out_of_memory - kill the "best" process when we run out of memory + * @zonelist: zonelist pointer + * @gfp_mask: memory allocation flags + * @order: amount of memory being requested as a power of 2 * * If we run out of memory, we have the choice between either * killing a random task (bad), letting the system crash (worse) diff --git a/mm/pagewalk.c b/mm/pagewalk.c index b4f27d22da9..1cf1417ef8b 100644 --- a/mm/pagewalk.c +++ b/mm/pagewalk.c @@ -77,11 +77,11 @@ static int walk_pud_range(pgd_t *pgd, unsigned long addr, unsigned long end, /** * walk_page_range - walk a memory map's page tables with a callback - * @mm - memory map to walk - * @addr - starting address - * @end - ending address - * @walk - set of callbacks to invoke for each level of the tree - * @private - private data passed to the callback function + * @mm: memory map to walk + * @addr: starting address + * @end: ending address + * @walk: set of callbacks to invoke for each level of the tree + * @private: private data passed to the callback function * * Recursively walk the page table for the memory area in a VMA, * calling supplied callbacks. Callbacks are called in-order (first diff --git a/mm/readahead.c b/mm/readahead.c index c9c50ca1ec3..8762e898897 100644 --- a/mm/readahead.c +++ b/mm/readahead.c @@ -443,9 +443,10 @@ EXPORT_SYMBOL_GPL(page_cache_sync_readahead); * pagecache pages * * page_cache_async_ondemand() should be called when a page is used which - * has the PG_readahead flag: this is a marker to suggest that the application + * has the PG_readahead flag; this is a marker to suggest that the application * has used up enough of the readahead window that we should start pulling in - * more pages. */ + * more pages. + */ void page_cache_async_readahead(struct address_space *mapping, struct file_ra_state *ra, struct file *filp, diff --git a/mm/rmap.c b/mm/rmap.c index 0c9a2df06c3..997f06907b6 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -335,6 +335,7 @@ static int page_referenced_anon(struct page *page, /** * page_referenced_file - referenced check for object-based rmap * @page: the page we're checking references on. + * @mem_cont: target memory controller * * For an object-based mapped page, find all the places it is mapped and * check/clear the referenced flag. This is done by following the page->mapping @@ -402,6 +403,7 @@ static int page_referenced_file(struct page *page, * page_referenced - test if the page was referenced * @page: the page to test * @is_locked: caller holds lock on the page + * @mem_cont: target memory controller * * Quick test_and_clear_referenced for all mappings to a page, * returns the number of ptes which referenced the page. @@ -506,7 +508,7 @@ int page_mkclean(struct page *page) EXPORT_SYMBOL_GPL(page_mkclean); /** - * page_set_anon_rmap - setup new anonymous rmap + * __page_set_anon_rmap - setup new anonymous rmap * @page: the page to add the mapping to * @vma: the vm area in which the mapping is added * @address: the user virtual address mapped @@ -530,7 +532,7 @@ static void __page_set_anon_rmap(struct page *page, } /** - * page_set_anon_rmap - sanity check anonymous rmap addition + * __page_check_anon_rmap - sanity check anonymous rmap addition * @page: the page to add the mapping to * @vma: the vm area in which the mapping is added * @address: the user virtual address mapped @@ -583,7 +585,7 @@ void page_add_anon_rmap(struct page *page, } } -/* +/** * page_add_new_anon_rmap - add pte mapping to a new anonymous page * @page: the page to add the mapping to * @vma: the vm area in which the mapping is added @@ -623,6 +625,8 @@ void page_add_file_rmap(struct page *page) /** * page_dup_rmap - duplicate pte mapping to a page * @page: the page to add the mapping to + * @vma: the vm area being duplicated + * @address: the user virtual address mapped * * For copy_page_range only: minimal extract from page_add_file_rmap / * page_add_anon_rmap, avoiding unnecessary tests (already checked) so it's @@ -642,6 +646,7 @@ void page_dup_rmap(struct page *page, struct vm_area_struct *vma, unsigned long /** * page_remove_rmap - take down pte mapping from a page * @page: page to remove mapping from + * @vma: the vm area in which the mapping is removed * * The caller needs to hold the pte lock. */ @@ -890,6 +895,7 @@ static int try_to_unmap_anon(struct page *page, int migration) /** * try_to_unmap_file - unmap file page using the object-based rmap method * @page: the page to unmap + * @migration: migration flag * * Find all the mappings of a page using the mapping pointer and the vma chains * contained in the address_space struct it points to. @@ -986,6 +992,7 @@ out: /** * try_to_unmap - try to remove all page table mappings to a page * @page: the page to get unmapped + * @migration: migration flag * * Tries to remove all the page table entries which are mapping this * page, used in the pageout path. Caller must hold the page lock. diff --git a/mm/shmem.c b/mm/shmem.c index 3372bc579e8..f514dd392cd 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -244,9 +244,8 @@ static void shmem_free_inode(struct super_block *sb) } } -/* +/** * shmem_recalc_inode - recalculate the size of an inode - * * @inode: inode to recalc * * We have to calculate the free blocks since the mm can drop @@ -270,9 +269,8 @@ static void shmem_recalc_inode(struct inode *inode) } } -/* +/** * shmem_swp_entry - find the swap vector position in the info structure - * * @info: info structure for the inode * @index: index of the page to find * @page: optional page to add to the structure. Has to be preset to @@ -374,13 +372,13 @@ static void shmem_swp_set(struct shmem_inode_info *info, swp_entry_t *entry, uns } } -/* +/** * shmem_swp_alloc - get the position of the swap entry for the page. - * If it does not exist allocate the entry. - * * @info: info structure for the inode * @index: index of the page to find * @sgp: check and recheck i_size? skip allocation? + * + * If the entry does not exist, allocate it. */ static swp_entry_t *shmem_swp_alloc(struct shmem_inode_info *info, unsigned long index, enum sgp_type sgp) { @@ -440,9 +438,8 @@ static swp_entry_t *shmem_swp_alloc(struct shmem_inode_info *info, unsigned long return entry; } -/* +/** * shmem_free_swp - free some swap entries in a directory - * * @dir: pointer to the directory * @edir: pointer after last entry of the directory * @punch_lock: pointer to spinlock when needed for the holepunch case @@ -2022,7 +2019,7 @@ static const struct inode_operations shmem_symlink_inode_operations = { }; #ifdef CONFIG_TMPFS_POSIX_ACL -/** +/* * Superblocks without xattr inode operations will get security.* xattr * support from the VFS "for free". As soon as we have any other xattrs * like ACLs, we also need to implement the security.* handlers at @@ -2561,12 +2558,11 @@ out4: } module_init(init_tmpfs) -/* +/** * shmem_file_setup - get an unlinked file living in tmpfs - * * @name: name for dentry (to be seen in /proc/<pid>/maps * @size: size to be set for the file - * + * @flags: vm_flags */ struct file *shmem_file_setup(char *name, loff_t size, unsigned long flags) { @@ -2621,9 +2617,8 @@ put_memory: return ERR_PTR(error); } -/* +/** * shmem_zero_setup - setup a shared anonymous mapping - * * @vma: the vma to be mmapped is prepared by do_mmap_pgoff */ int shmem_zero_setup(struct vm_area_struct *vma) diff --git a/mm/slab.c b/mm/slab.c index e6c698f5567..bb4070e1079 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -3624,12 +3624,11 @@ void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags) EXPORT_SYMBOL(kmem_cache_alloc); /** - * kmem_ptr_validate - check if an untrusted pointer might - * be a slab entry. + * kmem_ptr_validate - check if an untrusted pointer might be a slab entry. * @cachep: the cache we're checking against * @ptr: pointer to validate * - * This verifies that the untrusted pointer looks sane: + * This verifies that the untrusted pointer looks sane; * it is _not_ a guarantee that the pointer is actually * part of the slab cache in question, but it at least * validates that the pointer can be dereferenced and diff --git a/mm/slub.c b/mm/slub.c index 96d63eb3ab1..ca71d5b81e4 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -1536,9 +1536,15 @@ new_slab: * That is only possible if certain conditions are met that are being * checked when a slab is created. */ - if (!(gfpflags & __GFP_NORETRY) && (s->flags & __PAGE_ALLOC_FALLBACK)) - return kmalloc_large(s->objsize, gfpflags); - + if (!(gfpflags & __GFP_NORETRY) && + (s->flags & __PAGE_ALLOC_FALLBACK)) { + if (gfpflags & __GFP_WAIT) + local_irq_enable(); + object = kmalloc_large(s->objsize, gfpflags); + if (gfpflags & __GFP_WAIT) + local_irq_disable(); + return object; + } return NULL; debug: if (!alloc_debug_processing(s, c->page, object, addr)) diff --git a/mm/swap.c b/mm/swap.c index d4ec59aa5c4..aa1139ccf3a 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -78,12 +78,11 @@ void put_page(struct page *page) EXPORT_SYMBOL(put_page); /** - * put_pages_list(): release a list of pages + * put_pages_list() - release a list of pages + * @pages: list of pages threaded on page->lru * * Release a list of pages which are strung together on page.lru. Currently * used by read_cache_pages() and related error recovery code. - * - * @pages: list of pages threaded on page->lru */ void put_pages_list(struct list_head *pages) { diff --git a/mm/swap_state.c b/mm/swap_state.c index ec42f01a8d0..50757ee3f9f 100644 --- a/mm/swap_state.c +++ b/mm/swap_state.c @@ -115,6 +115,7 @@ void __delete_from_swap_cache(struct page *page) /** * add_to_swap - allocate swap space for a page * @page: page we want to move to swap + * @gfp_mask: memory allocation flags * * Allocate swap space for the page and add the page to the * swap cache. Caller needs to hold the page lock. @@ -315,6 +316,7 @@ struct page *read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask, /** * swapin_readahead - swap in pages in hope we need them soon * @entry: swap entry of this memory + * @gfp_mask: memory allocation flags * @vma: user vma this address belongs to * @addr: target address for mempolicy * diff --git a/mm/tiny-shmem.c b/mm/tiny-shmem.c index 702083638c1..f0f55875dd6 100644 --- a/mm/tiny-shmem.c +++ b/mm/tiny-shmem.c @@ -39,12 +39,11 @@ static int __init init_tmpfs(void) } module_init(init_tmpfs) -/* +/** * shmem_file_setup - get an unlinked file living in tmpfs - * * @name: name for dentry (to be seen in /proc/<pid>/maps * @size: size to be set for the file - * + * @flags: vm_flags */ struct file *shmem_file_setup(char *name, loff_t size, unsigned long flags) { @@ -95,9 +94,8 @@ put_memory: return ERR_PTR(error); } -/* +/** * shmem_zero_setup - setup a shared anonymous mapping - * * @vma: the vma to be mmapped is prepared by do_mmap_pgoff */ int shmem_zero_setup(struct vm_area_struct *vma) diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 950c0be9ca8..ecf91f8034b 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -757,7 +757,8 @@ finished: * @vma: vma to cover (map full range of vma) * @addr: vmalloc memory * @pgoff: number of pages into addr before first page to map - * @returns: 0 for success, -Exxx on failure + * + * Returns: 0 for success, -Exxx on failure * * This function checks that addr is a valid vmalloc'ed area, and * that it is big enough to cover the vma. Will return failure if @@ -829,7 +830,8 @@ static int f(pte_t *pte, pgtable_t table, unsigned long addr, void *data) /** * alloc_vm_area - allocate a range of kernel address space * @size: size of the area - * @returns: NULL on failure, vm_struct on success + * + * Returns: NULL on failure, vm_struct on success * * This function reserves a range of kernel address space, and * allocates pagetables to map that range. No actual mappings diff --git a/mm/vmscan.c b/mm/vmscan.c index 45711585684..4046434046e 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -70,13 +70,6 @@ struct scan_control { int order; - /* - * Pages that have (or should have) IO pending. If we run into - * a lot of these, we're better off waiting a little for IO to - * finish rather than scanning more pages in the VM. - */ - int nr_io_pages; - /* Which cgroup do we reclaim from */ struct mem_cgroup *mem_cgroup; @@ -512,10 +505,8 @@ static unsigned long shrink_page_list(struct list_head *page_list, */ if (sync_writeback == PAGEOUT_IO_SYNC && may_enter_fs) wait_on_page_writeback(page); - else { - sc->nr_io_pages++; + else goto keep_locked; - } } referenced = page_referenced(page, 1, sc->mem_cgroup); @@ -554,10 +545,8 @@ static unsigned long shrink_page_list(struct list_head *page_list, if (PageDirty(page)) { if (sc->order <= PAGE_ALLOC_COSTLY_ORDER && referenced) goto keep_locked; - if (!may_enter_fs) { - sc->nr_io_pages++; + if (!may_enter_fs) goto keep_locked; - } if (!sc->may_writepage) goto keep_locked; @@ -568,10 +557,8 @@ static unsigned long shrink_page_list(struct list_head *page_list, case PAGE_ACTIVATE: goto activate_locked; case PAGE_SUCCESS: - if (PageWriteback(page) || PageDirty(page)) { - sc->nr_io_pages++; + if (PageWriteback(page) || PageDirty(page)) goto keep; - } /* * A synchronous write - probably a ramdisk. Go * ahead and try to reclaim the page. @@ -1344,7 +1331,6 @@ static unsigned long do_try_to_free_pages(struct zone **zones, gfp_t gfp_mask, for (priority = DEF_PRIORITY; priority >= 0; priority--) { sc->nr_scanned = 0; - sc->nr_io_pages = 0; if (!priority) disable_swap_token(); nr_reclaimed += shrink_zones(priority, zones, sc); @@ -1379,8 +1365,7 @@ static unsigned long do_try_to_free_pages(struct zone **zones, gfp_t gfp_mask, } /* Take a nap, wait for some writeback to complete */ - if (sc->nr_scanned && priority < DEF_PRIORITY - 2 && - sc->nr_io_pages > sc->swap_cluster_max) + 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 */ @@ -1514,7 +1499,6 @@ loop_again: if (!priority) disable_swap_token(); - sc.nr_io_pages = 0; all_zones_ok = 1; /* @@ -1607,8 +1591,7 @@ loop_again: * OK, kswapd is getting into trouble. Take a nap, then take * another pass across the zones. */ - if (total_scanned && priority < DEF_PRIORITY - 2 && - sc.nr_io_pages > sc.swap_cluster_max) + if (total_scanned && priority < DEF_PRIORITY - 2) congestion_wait(WRITE, HZ/10); /* |