diff options
Diffstat (limited to 'mm/filemap.c')
| -rw-r--r-- | mm/filemap.c | 38 |
1 files changed, 13 insertions, 25 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index c0018f2d50e0..97f49ed35bd2 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -393,24 +393,11 @@ EXPORT_SYMBOL(filemap_write_and_wait_range); int replace_page_cache_page(struct page *old, struct page *new, gfp_t gfp_mask) { int error; - struct mem_cgroup *memcg = NULL; VM_BUG_ON(!PageLocked(old)); VM_BUG_ON(!PageLocked(new)); VM_BUG_ON(new->mapping); - /* - * This is not page migration, but prepare_migration and - * end_migration does enough work for charge replacement. - * - * In the longer term we probably want a specialized function - * for moving the charge from old to new in a more efficient - * manner. - */ - error = mem_cgroup_prepare_migration(old, new, &memcg, gfp_mask); - if (error) - return error; - error = radix_tree_preload(gfp_mask & ~__GFP_HIGHMEM); if (!error) { struct address_space *mapping = old->mapping; @@ -432,13 +419,12 @@ int replace_page_cache_page(struct page *old, struct page *new, gfp_t gfp_mask) if (PageSwapBacked(new)) __inc_zone_page_state(new, NR_SHMEM); spin_unlock_irq(&mapping->tree_lock); + /* mem_cgroup codes must not be called under tree_lock */ + mem_cgroup_replace_page_cache(old, new); radix_tree_preload_end(); if (freepage) freepage(old); page_cache_release(old); - mem_cgroup_end_migration(memcg, old, new, true); - } else { - mem_cgroup_end_migration(memcg, old, new, false); } return error; @@ -1828,7 +1814,7 @@ repeat: page = __page_cache_alloc(gfp | __GFP_COLD); if (!page) return ERR_PTR(-ENOMEM); - err = add_to_page_cache_lru(page, mapping, index, GFP_KERNEL); + err = add_to_page_cache_lru(page, mapping, index, gfp); if (unlikely(err)) { page_cache_release(page); if (err == -EEXIST) @@ -1925,10 +1911,7 @@ static struct page *wait_on_page_read(struct page *page) * @gfp: the page allocator flags to use if allocating * * This is the same as "read_mapping_page(mapping, index, NULL)", but with - * any new page allocations done using the specified allocation flags. Note - * that the Radix tree operations will still use GFP_KERNEL, so you can't - * expect to do this atomically or anything like that - but you can pass in - * other page requirements. + * any new page allocations done using the specified allocation flags. * * If the page does not get brought uptodate, return -EIO. */ @@ -1971,7 +1954,7 @@ EXPORT_SYMBOL(read_cache_page); */ int should_remove_suid(struct dentry *dentry) { - mode_t mode = dentry->d_inode->i_mode; + umode_t mode = dentry->d_inode->i_mode; int kill = 0; /* suid always must be killed */ @@ -2354,8 +2337,11 @@ struct page *grab_cache_page_write_begin(struct address_space *mapping, pgoff_t index, unsigned flags) { int status; + gfp_t gfp_mask; struct page *page; gfp_t gfp_notmask = 0; + + gfp_mask = mapping_gfp_mask(mapping) | __GFP_WRITE; if (flags & AOP_FLAG_NOFS) gfp_notmask = __GFP_FS; repeat: @@ -2363,7 +2349,7 @@ repeat: if (page) goto found; - page = __page_cache_alloc(mapping_gfp_mask(mapping) & ~gfp_notmask); + page = __page_cache_alloc(gfp_mask & ~gfp_notmask); if (!page) return NULL; status = add_to_page_cache_lru(page, mapping, index, @@ -2407,7 +2393,6 @@ static ssize_t generic_perform_write(struct file *file, iov_iter_count(i)); again: - /* * Bring in the user page that we will copy from _first_. * Otherwise there's a nasty deadlock on copying from the @@ -2463,7 +2448,10 @@ again: written += copied; balance_dirty_pages_ratelimited(mapping); - + if (fatal_signal_pending(current)) { + status = -EINTR; + break; + } } while (iov_iter_count(i)); return written ? written : status; |