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Shutemov" , Johannes Weiner , Matthew Wilcox Subject: [PATCH v5 1/2] mm: Allow the page cache to allocate large pages Date: Mon, 2 Sep 2019 03:23:40 -0600 Message-Id: <20190902092341.26712-2-william.kucharski@oracle.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190902092341.26712-1-william.kucharski@oracle.com> References: <20190902092341.26712-1-william.kucharski@oracle.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9367 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=2 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1909020107 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9367 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=2 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1909020107 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Add an 'order' argument to __page_cache_alloc() and do_read_cache_page(). Ensure the allocated pages are compound pages. Signed-off-by: Matthew Wilcox (Oracle) Signed-off-by: William Kucharski Reported-by: kbuild test robot --- fs/afs/dir.c | 2 +- fs/btrfs/compression.c | 2 +- fs/cachefiles/rdwr.c | 4 ++-- fs/ceph/addr.c | 2 +- fs/ceph/file.c | 2 +- include/linux/pagemap.h | 10 ++++++---- mm/filemap.c | 20 +++++++++++--------- mm/readahead.c | 2 +- net/ceph/pagelist.c | 4 ++-- net/ceph/pagevec.c | 2 +- 10 files changed, 27 insertions(+), 23 deletions(-) diff --git a/fs/afs/dir.c b/fs/afs/dir.c index 139b4e3cc946..ca8f8e77e012 100644 --- a/fs/afs/dir.c +++ b/fs/afs/dir.c @@ -274,7 +274,7 @@ static struct afs_read *afs_read_dir(struct afs_vnode *dvnode, struct key *key) afs_stat_v(dvnode, n_inval); ret = -ENOMEM; - req->pages[i] = __page_cache_alloc(gfp); + req->pages[i] = __page_cache_alloc(gfp, 0); if (!req->pages[i]) goto error; ret = add_to_page_cache_lru(req->pages[i], diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c index 60c47b417a4b..5280e7477b7e 100644 --- a/fs/btrfs/compression.c +++ b/fs/btrfs/compression.c @@ -466,7 +466,7 @@ static noinline int add_ra_bio_pages(struct inode *inode, } page = __page_cache_alloc(mapping_gfp_constraint(mapping, - ~__GFP_FS)); + ~__GFP_FS), 0); if (!page) break; diff --git a/fs/cachefiles/rdwr.c b/fs/cachefiles/rdwr.c index 44a3ce1e4ce4..11d30212745f 100644 --- a/fs/cachefiles/rdwr.c +++ b/fs/cachefiles/rdwr.c @@ -259,7 +259,7 @@ static int cachefiles_read_backing_file_one(struct cachefiles_object *object, goto backing_page_already_present; if (!newpage) { - newpage = __page_cache_alloc(cachefiles_gfp); + newpage = __page_cache_alloc(cachefiles_gfp, 0); if (!newpage) goto nomem_monitor; } @@ -495,7 +495,7 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object, goto backing_page_already_present; if (!newpage) { - newpage = __page_cache_alloc(cachefiles_gfp); + newpage = __page_cache_alloc(cachefiles_gfp, 0); if (!newpage) goto nomem; } diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index b3c8b886bf64..7c1c3857fbb9 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -1708,7 +1708,7 @@ int ceph_uninline_data(struct file *filp, struct page *locked_page) if (len > PAGE_SIZE) len = PAGE_SIZE; } else { - page = __page_cache_alloc(GFP_NOFS); + page = __page_cache_alloc(GFP_NOFS, 0); if (!page) { err = -ENOMEM; goto out; diff --git a/fs/ceph/file.c b/fs/ceph/file.c index 685a03cc4b77..ae58d7c31aa4 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -1305,7 +1305,7 @@ static ssize_t ceph_read_iter(struct kiocb *iocb, struct iov_iter *to) struct page *page = NULL; loff_t i_size; if (retry_op == READ_INLINE) { - page = __page_cache_alloc(GFP_KERNEL); + page = __page_cache_alloc(GFP_KERNEL, 0); if (!page) return -ENOMEM; } diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index c7552459a15f..92e026d9a6b7 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -208,17 +208,19 @@ static inline int page_cache_add_speculative(struct page *page, int count) } #ifdef CONFIG_NUMA -extern struct page *__page_cache_alloc(gfp_t gfp); +extern struct page *__page_cache_alloc(gfp_t gfp, unsigned int order); #else -static inline struct page *__page_cache_alloc(gfp_t gfp) +static inline struct page *__page_cache_alloc(gfp_t gfp, unsigned int order) { - return alloc_pages(gfp, 0); + if (order > 0) + gfp |= __GFP_COMP; + return alloc_pages(gfp, order); } #endif static inline struct page *page_cache_alloc(struct address_space *x) { - return __page_cache_alloc(mapping_gfp_mask(x)); + return __page_cache_alloc(mapping_gfp_mask(x), 0); } static inline gfp_t readahead_gfp_mask(struct address_space *x) diff --git a/mm/filemap.c b/mm/filemap.c index d0cf700bf201..38b46fc00855 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -954,22 +954,25 @@ int add_to_page_cache_lru(struct page *page, struct address_space *mapping, EXPORT_SYMBOL_GPL(add_to_page_cache_lru); #ifdef CONFIG_NUMA -struct page *__page_cache_alloc(gfp_t gfp) +struct page *__page_cache_alloc(gfp_t gfp, unsigned int order) { int n; struct page *page; + if (order > 0) + gfp |= __GFP_COMP; + if (cpuset_do_page_mem_spread()) { unsigned int cpuset_mems_cookie; do { cpuset_mems_cookie = read_mems_allowed_begin(); n = cpuset_mem_spread_node(); - page = __alloc_pages_node(n, gfp, 0); + page = __alloc_pages_node(n, gfp, order); } while (!page && read_mems_allowed_retry(cpuset_mems_cookie)); return page; } - return alloc_pages(gfp, 0); + return alloc_pages(gfp, order); } EXPORT_SYMBOL(__page_cache_alloc); #endif @@ -1665,7 +1668,7 @@ struct page *pagecache_get_page(struct address_space *mapping, pgoff_t offset, if (fgp_flags & FGP_NOFS) gfp_mask &= ~__GFP_FS; - page = __page_cache_alloc(gfp_mask); + page = __page_cache_alloc(gfp_mask, 0); if (!page) return NULL; @@ -2802,15 +2805,14 @@ static struct page *wait_on_page_read(struct page *page) static struct page *do_read_cache_page(struct address_space *mapping, pgoff_t index, int (*filler)(void *, struct page *), - void *data, - gfp_t gfp) + void *data, unsigned int order, gfp_t gfp) { struct page *page; int err; repeat: page = find_get_page(mapping, index); if (!page) { - page = __page_cache_alloc(gfp); + page = __page_cache_alloc(gfp, order); if (!page) return ERR_PTR(-ENOMEM); err = add_to_page_cache_lru(page, mapping, index, gfp); @@ -2917,7 +2919,7 @@ struct page *read_cache_page(struct address_space *mapping, int (*filler)(void *, struct page *), void *data) { - return do_read_cache_page(mapping, index, filler, data, + return do_read_cache_page(mapping, index, filler, data, 0, mapping_gfp_mask(mapping)); } EXPORT_SYMBOL(read_cache_page); @@ -2939,7 +2941,7 @@ struct page *read_cache_page_gfp(struct address_space *mapping, pgoff_t index, gfp_t gfp) { - return do_read_cache_page(mapping, index, NULL, NULL, gfp); + return do_read_cache_page(mapping, index, NULL, NULL, 0, gfp); } EXPORT_SYMBOL(read_cache_page_gfp); diff --git a/mm/readahead.c b/mm/readahead.c index 2fe72cd29b47..954760a612ea 100644 --- a/mm/readahead.c +++ b/mm/readahead.c @@ -193,7 +193,7 @@ unsigned int __do_page_cache_readahead(struct address_space *mapping, continue; } - page = __page_cache_alloc(gfp_mask); + page = __page_cache_alloc(gfp_mask, 0); if (!page) break; page->index = page_offset; diff --git a/net/ceph/pagelist.c b/net/ceph/pagelist.c index 65e34f78b05d..0c3face908dc 100644 --- a/net/ceph/pagelist.c +++ b/net/ceph/pagelist.c @@ -56,7 +56,7 @@ static int ceph_pagelist_addpage(struct ceph_pagelist *pl) struct page *page; if (!pl->num_pages_free) { - page = __page_cache_alloc(GFP_NOFS); + page = __page_cache_alloc(GFP_NOFS, 0); } else { page = list_first_entry(&pl->free_list, struct page, lru); list_del(&page->lru); @@ -107,7 +107,7 @@ int ceph_pagelist_reserve(struct ceph_pagelist *pl, size_t space) space = (space + PAGE_SIZE - 1) >> PAGE_SHIFT; /* conv to num pages */ while (space > pl->num_pages_free) { - struct page *page = __page_cache_alloc(GFP_NOFS); + struct page *page = __page_cache_alloc(GFP_NOFS, 0); if (!page) return -ENOMEM; list_add_tail(&page->lru, &pl->free_list); diff --git a/net/ceph/pagevec.c b/net/ceph/pagevec.c index 64305e7056a1..1d07e639216d 100644 --- a/net/ceph/pagevec.c +++ b/net/ceph/pagevec.c @@ -45,7 +45,7 @@ struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags) if (!pages) return ERR_PTR(-ENOMEM); for (i = 0; i < num_pages; i++) { - pages[i] = __page_cache_alloc(flags); + pages[i] = __page_cache_alloc(flags, 0); if (pages[i] == NULL) { ceph_release_page_vector(pages, i); return ERR_PTR(-ENOMEM);