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[23.128.96.18]) by mx.google.com with ESMTP id dp20si1689822ejc.620.2020.12.09.18.40.06; Wed, 09 Dec 2020 18:40:29 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727304AbgLJB55 (ORCPT + 99 others); Wed, 9 Dec 2020 20:57:57 -0500 Received: from szxga06-in.huawei.com ([45.249.212.32]:8973 "EHLO szxga06-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727426AbgLJB5v (ORCPT ); Wed, 9 Dec 2020 20:57:51 -0500 Received: from DGGEMS402-HUB.china.huawei.com (unknown [172.30.72.59]) by szxga06-in.huawei.com (SkyGuard) with ESMTP id 4Crxq60RY7zhm2N; Thu, 10 Dec 2020 09:56:34 +0800 (CST) Received: from [10.136.114.67] (10.136.114.67) by smtp.huawei.com (10.3.19.202) with Microsoft SMTP Server (TLS) id 14.3.487.0; Thu, 10 Dec 2020 09:56:58 +0800 Subject: Re: [PATCH RESEND v2 1/5] f2fs: compress: add compress_inode to cache compressed blocks To: CC: , , References: <20201209084328.30416-1-yuchao0@huawei.com> From: Chao Yu Message-ID: Date: Thu, 10 Dec 2020 09:56:57 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20201209084328.30416-1-yuchao0@huawei.com> Content-Type: text/plain; charset="windows-1252"; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.136.114.67] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Daeho, Jaegeuk I found one missing place in this patch which should adapt "compress vs verity race bugfix" Could you please check and apply below diff? From 61a9812944ac2f6f64fb458d5ef8b662c007bc50 Mon Sep 17 00:00:00 2001 From: Chao Yu Date: Thu, 10 Dec 2020 09:52:42 +0800 Subject: [PATCH] fix Signed-off-by: Chao Yu --- fs/f2fs/data.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 6787a7a03e86..894c5680db4a 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -2271,11 +2271,8 @@ int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret, f2fs_load_compressed_page(sbi, page, blkaddr); if (PageUptodate(page)) { if (!atomic_dec_return(&dic->pending_pages)) { - bool verity = - f2fs_need_verity(inode, start_idx); - - f2fs_do_decompress_pages(dic, verity); - if (verity) { + f2fs_do_decompress_pages(dic, for_verity); + if (for_verity) { f2fs_verify_pages(dic->rpages, dic->cluster_size); f2fs_free_dic(dic); -- 2.29.2 Thanks, On 2020/12/9 16:43, Chao Yu wrote: > Support to use address space of inner inode to cache compressed block, > in order to improve cache hit ratio of random read. > > Signed-off-by: Chao Yu > --- > Documentation/filesystems/f2fs.rst | 3 + > fs/f2fs/compress.c | 198 +++++++++++++++++++++++++++-- > fs/f2fs/data.c | 29 ++++- > fs/f2fs/debug.c | 13 ++ > fs/f2fs/f2fs.h | 34 ++++- > fs/f2fs/gc.c | 1 + > fs/f2fs/inode.c | 21 ++- > fs/f2fs/segment.c | 6 +- > fs/f2fs/super.c | 19 ++- > include/linux/f2fs_fs.h | 1 + > 10 files changed, 305 insertions(+), 20 deletions(-) > > diff --git a/Documentation/filesystems/f2fs.rst b/Documentation/filesystems/f2fs.rst > index dae15c96e659..5fa45fd8e4af 100644 > --- a/Documentation/filesystems/f2fs.rst > +++ b/Documentation/filesystems/f2fs.rst > @@ -268,6 +268,9 @@ compress_mode=%s Control file compression mode. This supports "fs" and "user" > choosing the target file and the timing. The user can do manual > compression/decompression on the compression enabled files using > ioctls. > +compress_cache Support to use address space of a filesystem managed inode to > + cache compressed block, in order to improve cache hit ratio of > + random read. > inlinecrypt When possible, encrypt/decrypt the contents of encrypted > files using the blk-crypto framework rather than > filesystem-layer encryption. This allows the use of > diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c > index 4bcbacfe3325..446dd41a7bad 100644 > --- a/fs/f2fs/compress.c > +++ b/fs/f2fs/compress.c > @@ -12,9 +12,11 @@ > #include > #include > #include > +#include > > #include "f2fs.h" > #include "node.h" > +#include "segment.h" > #include > > static struct kmem_cache *cic_entry_slab; > @@ -721,25 +723,14 @@ static int f2fs_compress_pages(struct compress_ctx *cc) > return ret; > } > > -void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity) > +void f2fs_do_decompress_pages(struct decompress_io_ctx *dic, bool verity) > { > - struct decompress_io_ctx *dic = > - (struct decompress_io_ctx *)page_private(page); > - struct f2fs_sb_info *sbi = F2FS_I_SB(dic->inode); > struct f2fs_inode_info *fi= F2FS_I(dic->inode); > const struct f2fs_compress_ops *cops = > f2fs_cops[fi->i_compress_algorithm]; > int ret; > int i; > > - dec_page_count(sbi, F2FS_RD_DATA); > - > - if (bio->bi_status || PageError(page)) > - dic->failed = true; > - > - if (atomic_dec_return(&dic->pending_pages)) > - return; > - > trace_f2fs_decompress_pages_start(dic->inode, dic->cluster_idx, > dic->cluster_size, fi->i_compress_algorithm); > > @@ -797,6 +788,7 @@ void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity) > ret = cops->decompress_pages(dic); > > if (!ret && (fi->i_compress_flag & 1 << COMPRESS_CHKSUM)) { > + struct f2fs_sb_info *sbi = F2FS_I_SB(dic->inode); > u32 provided = le32_to_cpu(dic->cbuf->chksum); > u32 calculated = f2fs_crc32(sbi, dic->cbuf->cdata, dic->clen); > > @@ -830,6 +822,30 @@ void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity) > f2fs_free_dic(dic); > } > > +void f2fs_cache_compressed_page(struct f2fs_sb_info *sbi, struct page *page, > + nid_t ino, block_t blkaddr); > +void f2fs_decompress_pages(struct bio *bio, struct page *page, > + bool verity, unsigned int ofs) > +{ > + struct decompress_io_ctx *dic = > + (struct decompress_io_ctx *)page_private(page); > + struct f2fs_sb_info *sbi = F2FS_I_SB(dic->inode); > + block_t blkaddr; > + > + dec_page_count(sbi, F2FS_RD_DATA); > + > + if (bio->bi_status || PageError(page)) > + dic->failed = true; > + > + blkaddr = SECTOR_TO_BLOCK(bio->bi_iter.bi_sector) + ofs; > + f2fs_cache_compressed_page(sbi, page, dic->inode->i_ino, blkaddr); > + > + if (atomic_dec_return(&dic->pending_pages)) > + return; > + > + f2fs_do_decompress_pages(dic, verity); > +} > + > static bool is_page_in_cluster(struct compress_ctx *cc, pgoff_t index) > { > if (cc->cluster_idx == NULL_CLUSTER) > @@ -1600,6 +1616,164 @@ void f2fs_decompress_end_io(struct page **rpages, > } > } > > +const struct address_space_operations f2fs_compress_aops = { > + .releasepage = f2fs_release_page, > + .invalidatepage = f2fs_invalidate_page, > +}; > + > +struct address_space *COMPRESS_MAPPING(struct f2fs_sb_info *sbi) > +{ > + return sbi->compress_inode->i_mapping; > +} > + > +void f2fs_invalidate_compress_page(struct f2fs_sb_info *sbi, block_t blkaddr) > +{ > + if (!sbi->compress_inode) > + return; > + invalidate_mapping_pages(COMPRESS_MAPPING(sbi), blkaddr, blkaddr); > +} > + > +void f2fs_cache_compressed_page(struct f2fs_sb_info *sbi, struct page *page, > + nid_t ino, block_t blkaddr) > +{ > + struct page *cpage; > + int ret; > + struct sysinfo si; > + unsigned long free_ram, avail_ram; > + > + if (!test_opt(sbi, COMPRESS_CACHE)) > + return; > + > + si_meminfo(&si); > + free_ram = si.freeram; > + avail_ram = si.totalram - si.totalhigh; > + > + /* free memory is lower than watermark, deny caching compress page */ > + if (free_ram <= sbi->compress_watermark / 100 * avail_ram) > + return; > + > + /* cached page count exceed threshold, deny caching compress page */ > + if (COMPRESS_MAPPING(sbi)->nrpages >= > + free_ram / 100 * sbi->compress_percent) > + return; > + > + cpage = find_get_page(COMPRESS_MAPPING(sbi), blkaddr); > + if (cpage) { > + f2fs_put_page(cpage, 0); > + return; > + } > + > + cpage = alloc_page(__GFP_IO); > + if (!cpage) > + return; > + > + ret = add_to_page_cache_lru(cpage, COMPRESS_MAPPING(sbi), > + blkaddr, GFP_NOFS); > + if (ret) { > + f2fs_put_page(cpage, 0); > + return; > + } > + > + memcpy(page_address(cpage), page_address(page), PAGE_SIZE); > + SetPageUptodate(cpage); > + > + f2fs_set_page_private(cpage, ino); > + > + f2fs_put_page(cpage, 1); > +} > + > +void f2fs_load_compressed_page(struct f2fs_sb_info *sbi, struct page *page, > + block_t blkaddr) > +{ > + struct page *cpage; > + > + if (!test_opt(sbi, COMPRESS_CACHE)) > + return; > + > + cpage = f2fs_pagecache_get_page(COMPRESS_MAPPING(sbi), > + blkaddr, FGP_LOCK | FGP_NOWAIT, GFP_NOFS); > + if (cpage) { > + if (PageUptodate(cpage)) { > + atomic_inc(&sbi->compress_page_hit); > + memcpy(page_address(page), > + page_address(cpage), PAGE_SIZE); > + SetPageUptodate(page); > + } > + f2fs_put_page(cpage, 1); > + } > +} > + > +void f2fs_invalidate_compress_pages(struct f2fs_sb_info *sbi, nid_t ino) > +{ > + struct address_space *mapping = sbi->compress_inode->i_mapping; > + struct pagevec pvec; > + pgoff_t index = 0; > + pgoff_t end = MAX_BLKADDR(sbi); > + > + pagevec_init(&pvec); > + > + do { > + unsigned int nr_pages; > + int i; > + > + nr_pages = pagevec_lookup_range(&pvec, mapping, > + &index, end - 1); > + if (!nr_pages) > + break; > + > + for (i = 0; i < nr_pages; i++) { > + struct page *page = pvec.pages[i]; > + > + if (page->index > end) > + break; > + > + lock_page(page); > + if (page->mapping != mapping) { > + unlock_page(page); > + continue; > + } > + > + if (ino != page_private(page)) { > + unlock_page(page); > + continue; > + } > + > + generic_error_remove_page(mapping, page); > + unlock_page(page); > + } > + pagevec_release(&pvec); > + cond_resched(); > + } while (index < end); > +} > + > +int f2fs_init_compress_inode(struct f2fs_sb_info *sbi) > +{ > + struct inode *inode; > + > + if (!test_opt(sbi, COMPRESS_CACHE)) > + return 0; > + > + inode = f2fs_iget(sbi->sb, F2FS_COMPRESS_INO(sbi)); > + if (IS_ERR(inode)) > + return PTR_ERR(inode); > + sbi->compress_inode = inode; > + > + sbi->compress_percent = COMPRESS_PERCENT; > + sbi->compress_watermark = COMPRESS_WATERMARK; > + > + atomic_set(&sbi->compress_page_hit, 0); > + > + return 0; > +} > + > +void f2fs_destroy_compress_inode(struct f2fs_sb_info *sbi) > +{ > + if (!sbi->compress_inode) > + return; > + iput(sbi->compress_inode); > + sbi->compress_inode = NULL; > +} > + > int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi) > { > dev_t dev = sbi->sb->s_bdev->bd_dev; > diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c > index aa34d620bec9..6787a7a03e86 100644 > --- a/fs/f2fs/data.c > +++ b/fs/f2fs/data.c > @@ -133,17 +133,21 @@ static void __read_end_io(struct bio *bio, bool compr, bool verity) > struct page *page; > struct bio_vec *bv; > struct bvec_iter_all iter_all; > + unsigned int ofs = 0; > > bio_for_each_segment_all(bv, bio, iter_all) { > page = bv->bv_page; > > #ifdef CONFIG_F2FS_FS_COMPRESSION > if (compr && f2fs_is_compressed_page(page)) { > - f2fs_decompress_pages(bio, page, verity); > + f2fs_decompress_pages(bio, page, verity, ofs); > + ofs++; > continue; > } > - if (verity) > + if (verity) { > + ofs++; > continue; > + } > #endif > > /* PG_error was set if any post_read step failed */ > @@ -156,6 +160,7 @@ static void __read_end_io(struct bio *bio, bool compr, bool verity) > } > dec_page_count(F2FS_P_SB(page), __read_io_type(page)); > unlock_page(page); > + ofs++; > } > } > > @@ -1421,9 +1426,11 @@ static int __allocate_data_block(struct dnode_of_data *dn, int seg_type) > old_blkaddr = dn->data_blkaddr; > f2fs_allocate_data_block(sbi, NULL, old_blkaddr, &dn->data_blkaddr, > &sum, seg_type, NULL); > - if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO) > + if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO) { > invalidate_mapping_pages(META_MAPPING(sbi), > old_blkaddr, old_blkaddr); > + f2fs_invalidate_compress_page(sbi, old_blkaddr); > + } > f2fs_update_data_blkaddr(dn, dn->data_blkaddr); > > /* > @@ -2261,6 +2268,22 @@ int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret, > blkaddr = data_blkaddr(dn.inode, dn.node_page, > dn.ofs_in_node + i + 1); > > + f2fs_load_compressed_page(sbi, page, blkaddr); > + if (PageUptodate(page)) { > + if (!atomic_dec_return(&dic->pending_pages)) { > + bool verity = > + f2fs_need_verity(inode, start_idx); > + > + f2fs_do_decompress_pages(dic, verity); > + if (verity) { > + f2fs_verify_pages(dic->rpages, > + dic->cluster_size); > + f2fs_free_dic(dic); > + } > + } > + continue; > + } > + > if (bio && (!page_is_mergeable(sbi, bio, > *last_block_in_bio, blkaddr) || > !f2fs_crypt_mergeable_bio(bio, inode, page->index, NULL))) { > diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c > index 197c914119da..f1f8714066c5 100644 > --- a/fs/f2fs/debug.c > +++ b/fs/f2fs/debug.c > @@ -145,6 +145,12 @@ static void update_general_status(struct f2fs_sb_info *sbi) > si->node_pages = NODE_MAPPING(sbi)->nrpages; > if (sbi->meta_inode) > si->meta_pages = META_MAPPING(sbi)->nrpages; > +#ifdef CONFIG_F2FS_FS_COMPRESSION > + if (sbi->compress_inode) { > + si->compress_pages = COMPRESS_MAPPING(sbi)->nrpages; > + si->compress_page_hit = atomic_read(&sbi->compress_page_hit); > + } > +#endif > si->nats = NM_I(sbi)->nat_cnt[TOTAL_NAT]; > si->dirty_nats = NM_I(sbi)->nat_cnt[DIRTY_NAT]; > si->sits = MAIN_SEGS(sbi); > @@ -299,6 +305,12 @@ static void update_mem_info(struct f2fs_sb_info *sbi) > unsigned npages = META_MAPPING(sbi)->nrpages; > si->page_mem += (unsigned long long)npages << PAGE_SHIFT; > } > +#ifdef CONFIG_F2FS_FS_COMPRESSION > + if (sbi->compress_inode) { > + unsigned npages = COMPRESS_MAPPING(sbi)->nrpages; > + si->page_mem += (unsigned long long)npages << PAGE_SHIFT; > + } > +#endif > } > > static int stat_show(struct seq_file *s, void *v) > @@ -461,6 +473,7 @@ static int stat_show(struct seq_file *s, void *v) > "volatile IO: %4d (Max. %4d)\n", > si->inmem_pages, si->aw_cnt, si->max_aw_cnt, > si->vw_cnt, si->max_vw_cnt); > + seq_printf(s, " - compress: %4d, hit:%8d\n", si->compress_pages, si->compress_page_hit); > seq_printf(s, " - nodes: %4d in %4d\n", > si->ndirty_node, si->node_pages); > seq_printf(s, " - dents: %4d in dirs:%4d (%4d)\n", > diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h > index 7364d453783f..0ff8b18eda05 100644 > --- a/fs/f2fs/f2fs.h > +++ b/fs/f2fs/f2fs.h > @@ -97,6 +97,7 @@ extern const char *f2fs_fault_name[FAULT_MAX]; > #define F2FS_MOUNT_DISABLE_CHECKPOINT 0x02000000 > #define F2FS_MOUNT_NORECOVERY 0x04000000 > #define F2FS_MOUNT_ATGC 0x08000000 > +#define F2FS_MOUNT_COMPRESS_CACHE 0x10000000 > > #define F2FS_OPTION(sbi) ((sbi)->mount_opt) > #define clear_opt(sbi, option) (F2FS_OPTION(sbi).opt &= ~F2FS_MOUNT_##option) > @@ -1298,6 +1299,9 @@ enum compress_flag { > COMPRESS_MAX_FLAG, > }; > > +#define COMPRESS_WATERMARK 20 > +#define COMPRESS_PERCENT 20 > + > #define COMPRESS_DATA_RESERVED_SIZE 4 > struct compress_data { > __le32 clen; /* compressed data size */ > @@ -1571,6 +1575,11 @@ struct f2fs_sb_info { > #ifdef CONFIG_F2FS_FS_COMPRESSION > struct kmem_cache *page_array_slab; /* page array entry */ > unsigned int page_array_slab_size; /* default page array slab size */ > + > + struct inode *compress_inode; /* cache compressed blocks */ > + unsigned int compress_percent; /* cache page percentage */ > + unsigned int compress_watermark; /* cache page watermark */ > + atomic_t compress_page_hit; /* cache hit count */ > #endif > }; > > @@ -3536,7 +3545,8 @@ struct f2fs_stat_info { > unsigned int bimodal, avg_vblocks; > int util_free, util_valid, util_invalid; > int rsvd_segs, overp_segs; > - int dirty_count, node_pages, meta_pages; > + int dirty_count, node_pages, meta_pages, compress_pages; > + int compress_page_hit; > int prefree_count, call_count, cp_count, bg_cp_count; > int tot_segs, node_segs, data_segs, free_segs, free_secs; > int bg_node_segs, bg_data_segs; > @@ -3874,7 +3884,8 @@ void f2fs_compress_write_end_io(struct bio *bio, struct page *page); > bool f2fs_is_compress_backend_ready(struct inode *inode); > int f2fs_init_compress_mempool(void); > void f2fs_destroy_compress_mempool(void); > -void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity); > +void f2fs_do_decompress_pages(struct decompress_io_ctx *dic, bool verity); > +void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity, unsigned int ofs); > bool f2fs_cluster_is_empty(struct compress_ctx *cc); > bool f2fs_cluster_can_merge_page(struct compress_ctx *cc, pgoff_t index); > void f2fs_compress_ctx_add_page(struct compress_ctx *cc, struct page *page); > @@ -3893,10 +3904,19 @@ void f2fs_decompress_end_io(struct page **rpages, > int f2fs_init_compress_ctx(struct compress_ctx *cc); > void f2fs_destroy_compress_ctx(struct compress_ctx *cc); > void f2fs_init_compress_info(struct f2fs_sb_info *sbi); > +int f2fs_init_compress_inode(struct f2fs_sb_info *sbi); > +void f2fs_destroy_compress_inode(struct f2fs_sb_info *sbi); > int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi); > void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi); > int __init f2fs_init_compress_cache(void); > void f2fs_destroy_compress_cache(void); > +struct address_space *COMPRESS_MAPPING(struct f2fs_sb_info *sbi); > +void f2fs_invalidate_compress_page(struct f2fs_sb_info *sbi, block_t blkaddr); > +void f2fs_cache_compressed_page(struct f2fs_sb_info *sbi, struct page *page, > + nid_t ino, block_t blkaddr); > +void f2fs_load_compressed_page(struct f2fs_sb_info *sbi, struct page *page, > + block_t blkaddr); > +void f2fs_invalidate_compress_pages(struct f2fs_sb_info *sbi, nid_t ino); > #else > static inline bool f2fs_is_compressed_page(struct page *page) { return false; } > static inline bool f2fs_is_compress_backend_ready(struct inode *inode) > @@ -3913,10 +3933,20 @@ static inline struct page *f2fs_compress_control_page(struct page *page) > } > static inline int f2fs_init_compress_mempool(void) { return 0; } > static inline void f2fs_destroy_compress_mempool(void) { } > +static inline int f2fs_init_compress_inode(struct f2fs_sb_info *sbi) { return 0; } > +static inline void f2fs_destroy_compress_inode(struct f2fs_sb_info *sbi) { } > static inline int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi) { return 0; } > static inline void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi) { } > static inline int __init f2fs_init_compress_cache(void) { return 0; } > static inline void f2fs_destroy_compress_cache(void) { } > +static inline void f2fs_invalidate_compress_page(struct f2fs_sb_info *sbi, > + block_t blkaddr) { } > +static inline void f2fs_cache_compressed_page(struct f2fs_sb_info *sbi, > + struct page *page, nid_t ino, block_t blkaddr) { } > +static inline void f2fs_load_compressed_page(struct f2fs_sb_info *sbi, > + struct page *page, block_t blkaddr) { } > +static inline void f2fs_invalidate_compress_pages(struct f2fs_sb_info *sbi, > + nid_t ino) { } > #endif > > static inline void set_compress_context(struct inode *inode) > diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c > index 3ef84e6ded41..43919a3ae6a6 100644 > --- a/fs/f2fs/gc.c > +++ b/fs/f2fs/gc.c > @@ -1225,6 +1225,7 @@ static int move_data_block(struct inode *inode, block_t bidx, > f2fs_put_page(mpage, 1); > invalidate_mapping_pages(META_MAPPING(fio.sbi), > fio.old_blkaddr, fio.old_blkaddr); > + f2fs_invalidate_compress_page(fio.sbi, fio.old_blkaddr); > > set_page_dirty(fio.encrypted_page); > if (clear_page_dirty_for_io(fio.encrypted_page)) > diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c > index 349d9cb933ee..f030b9b79202 100644 > --- a/fs/f2fs/inode.c > +++ b/fs/f2fs/inode.c > @@ -18,6 +18,10 @@ > > #include > > +#ifdef CONFIG_F2FS_FS_COMPRESSION > +extern const struct address_space_operations f2fs_compress_aops; > +#endif > + > void f2fs_mark_inode_dirty_sync(struct inode *inode, bool sync) > { > if (is_inode_flag_set(inode, FI_NEW_INODE)) > @@ -494,6 +498,11 @@ struct inode *f2fs_iget(struct super_block *sb, unsigned long ino) > if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi)) > goto make_now; > > +#ifdef CONFIG_F2FS_FS_COMPRESSION > + if (ino == F2FS_COMPRESS_INO(sbi)) > + goto make_now; > +#endif > + > ret = do_read_inode(inode); > if (ret) > goto bad_inode; > @@ -504,6 +513,12 @@ struct inode *f2fs_iget(struct super_block *sb, unsigned long ino) > } else if (ino == F2FS_META_INO(sbi)) { > inode->i_mapping->a_ops = &f2fs_meta_aops; > mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); > + } else if (ino == F2FS_COMPRESS_INO(sbi)) { > +#ifdef CONFIG_F2FS_FS_COMPRESSION > + inode->i_mapping->a_ops = &f2fs_compress_aops; > +#endif > + mapping_set_gfp_mask(inode->i_mapping, > + GFP_NOFS | __GFP_HIGHMEM | __GFP_MOVABLE); > } else if (S_ISREG(inode->i_mode)) { > inode->i_op = &f2fs_file_inode_operations; > inode->i_fop = &f2fs_file_operations; > @@ -722,8 +737,12 @@ void f2fs_evict_inode(struct inode *inode) > trace_f2fs_evict_inode(inode); > truncate_inode_pages_final(&inode->i_data); > > + if (test_opt(sbi, COMPRESS_CACHE) && f2fs_compressed_file(inode)) > + f2fs_invalidate_compress_pages(sbi, inode->i_ino); > + > if (inode->i_ino == F2FS_NODE_INO(sbi) || > - inode->i_ino == F2FS_META_INO(sbi)) > + inode->i_ino == F2FS_META_INO(sbi) || > + inode->i_ino == F2FS_COMPRESS_INO(sbi)) > goto out_clear; > > f2fs_bug_on(sbi, get_dirty_pages(inode)); > diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c > index deca74cb17df..d8570b0359f5 100644 > --- a/fs/f2fs/segment.c > +++ b/fs/f2fs/segment.c > @@ -2305,6 +2305,7 @@ void f2fs_invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr) > return; > > invalidate_mapping_pages(META_MAPPING(sbi), addr, addr); > + f2fs_invalidate_compress_page(sbi, addr); > > /* add it into sit main buffer */ > down_write(&sit_i->sentry_lock); > @@ -3432,9 +3433,11 @@ static void do_write_page(struct f2fs_summary *sum, struct f2fs_io_info *fio) > reallocate: > f2fs_allocate_data_block(fio->sbi, fio->page, fio->old_blkaddr, > &fio->new_blkaddr, sum, type, fio); > - if (GET_SEGNO(fio->sbi, fio->old_blkaddr) != NULL_SEGNO) > + if (GET_SEGNO(fio->sbi, fio->old_blkaddr) != NULL_SEGNO) { > invalidate_mapping_pages(META_MAPPING(fio->sbi), > fio->old_blkaddr, fio->old_blkaddr); > + f2fs_invalidate_compress_page(fio->sbi, fio->old_blkaddr); > + } > > /* writeout dirty page into bdev */ > f2fs_submit_page_write(fio); > @@ -3607,6 +3610,7 @@ void f2fs_do_replace_block(struct f2fs_sb_info *sbi, struct f2fs_summary *sum, > if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO) { > invalidate_mapping_pages(META_MAPPING(sbi), > old_blkaddr, old_blkaddr); > + f2fs_invalidate_compress_page(sbi, old_blkaddr); > if (!from_gc) > update_segment_mtime(sbi, old_blkaddr, 0); > update_sit_entry(sbi, old_blkaddr, -1); > diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c > index 8a82721b69ef..50e749169841 100644 > --- a/fs/f2fs/super.c > +++ b/fs/f2fs/super.c > @@ -148,6 +148,7 @@ enum { > Opt_compress_extension, > Opt_compress_chksum, > Opt_compress_mode, > + Opt_compress_cache, > Opt_atgc, > Opt_err, > }; > @@ -218,6 +219,7 @@ static match_table_t f2fs_tokens = { > {Opt_compress_extension, "compress_extension=%s"}, > {Opt_compress_chksum, "compress_chksum"}, > {Opt_compress_mode, "compress_mode=%s"}, > + {Opt_compress_cache, "compress_cache"}, > {Opt_atgc, "atgc"}, > {Opt_err, NULL}, > }; > @@ -955,12 +957,16 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount) > } > kfree(name); > break; > + case Opt_compress_cache: > + set_opt(sbi, COMPRESS_CACHE); > + break; > #else > case Opt_compress_algorithm: > case Opt_compress_log_size: > case Opt_compress_extension: > case Opt_compress_chksum: > case Opt_compress_mode: > + case Opt_compress_cache: > f2fs_info(sbi, "compression options not supported"); > break; > #endif > @@ -1285,6 +1291,8 @@ static void f2fs_put_super(struct super_block *sb) > > f2fs_bug_on(sbi, sbi->fsync_node_num); > > + f2fs_destroy_compress_inode(sbi); > + > iput(sbi->node_inode); > sbi->node_inode = NULL; > > @@ -1554,6 +1562,9 @@ static inline void f2fs_show_compress_options(struct seq_file *seq, > seq_printf(seq, ",compress_mode=%s", "fs"); > else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER) > seq_printf(seq, ",compress_mode=%s", "user"); > + > + if (test_opt(sbi, COMPRESS_CACHE)) > + seq_puts(seq, ",compress_cache"); > } > > static int f2fs_show_options(struct seq_file *seq, struct dentry *root) > @@ -3759,10 +3770,14 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent) > goto free_node_inode; > } > > - err = f2fs_register_sysfs(sbi); > + err = f2fs_init_compress_inode(sbi); > if (err) > goto free_root_inode; > > + err = f2fs_register_sysfs(sbi); > + if (err) > + goto free_compress_inode; > + > #ifdef CONFIG_QUOTA > /* Enable quota usage during mount */ > if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) { > @@ -3896,6 +3911,8 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent) > /* evict some inodes being cached by GC */ > evict_inodes(sb); > f2fs_unregister_sysfs(sbi); > +free_compress_inode: > + f2fs_destroy_compress_inode(sbi); > free_root_inode: > dput(sb->s_root); > sb->s_root = NULL; > diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h > index 7dc2a06cf19a..55be7afeee90 100644 > --- a/include/linux/f2fs_fs.h > +++ b/include/linux/f2fs_fs.h > @@ -34,6 +34,7 @@ > #define F2FS_ROOT_INO(sbi) ((sbi)->root_ino_num) > #define F2FS_NODE_INO(sbi) ((sbi)->node_ino_num) > #define F2FS_META_INO(sbi) ((sbi)->meta_ino_num) > +#define F2FS_COMPRESS_INO(sbi) (NM_I(sbi)->max_nid) > > #define F2FS_MAX_QUOTAS 3 > >