From: Jeffle Xu <jefflexu@linux.alibaba.com> To: dhowells@redhat.com, linux-cachefs@redhat.com, xiang@kernel.org, chao@kernel.org, linux-erofs@lists.ozlabs.org Cc: torvalds@linux-foundation.org, gregkh@linuxfoundation.org, willy@infradead.org, linux-fsdevel@vger.kernel.org, joseph.qi@linux.alibaba.com, bo.liu@linux.alibaba.com, tao.peng@linux.alibaba.com, gerry@linux.alibaba.com, eguan@linux.alibaba.com, linux-kernel@vger.kernel.org, luodaowen.backend@bytedance.com, tianzichen@kuaishou.com, fannaihao@baidu.com Subject: [PATCH v6 08/22] erofs: use meta buffers for erofs_read_superblock() Date: Fri, 25 Mar 2022 20:22:09 +0800 [thread overview] Message-ID: <20220325122223.102958-9-jefflexu@linux.alibaba.com> (raw) In-Reply-To: <20220325122223.102958-1-jefflexu@linux.alibaba.com> The only change is that, meta buffers read cache page without __GFP_FS flag, which shall not matter. Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com> Reviewed-by: Chao Yu <chao@kernel.org> Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com> --- fs/erofs/super.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/fs/erofs/super.c b/fs/erofs/super.c index 915eefe0d7e2..12755217631f 100644 --- a/fs/erofs/super.c +++ b/fs/erofs/super.c @@ -281,21 +281,19 @@ static int erofs_init_devices(struct super_block *sb, static int erofs_read_superblock(struct super_block *sb) { struct erofs_sb_info *sbi; - struct page *page; + struct erofs_buf buf = __EROFS_BUF_INITIALIZER; struct erofs_super_block *dsb; unsigned int blkszbits; void *data; int ret; - page = read_mapping_page(sb->s_bdev->bd_inode->i_mapping, 0, NULL); - if (IS_ERR(page)) { + data = erofs_read_metabuf(&buf, sb, 0, EROFS_KMAP); + if (IS_ERR(data)) { erofs_err(sb, "cannot read erofs superblock"); - return PTR_ERR(page); + return PTR_ERR(data); } sbi = EROFS_SB(sb); - - data = kmap(page); dsb = (struct erofs_super_block *)(data + EROFS_SUPER_OFFSET); ret = -EINVAL; @@ -365,8 +363,7 @@ static int erofs_read_superblock(struct super_block *sb) if (erofs_sb_has_ztailpacking(sbi)) erofs_info(sb, "EXPERIMENTAL compressed inline data feature in use. Use at your own risk!"); out: - kunmap(page); - put_page(page); + erofs_put_metabuf(&buf); return ret; } -- 2.27.0
WARNING: multiple messages have this Message-ID (diff)
From: Jeffle Xu <jefflexu@linux.alibaba.com> To: dhowells@redhat.com, linux-cachefs@redhat.com, xiang@kernel.org, chao@kernel.org, linux-erofs@lists.ozlabs.org Cc: gregkh@linuxfoundation.org, fannaihao@baidu.com, willy@infradead.org, linux-kernel@vger.kernel.org, tianzichen@kuaishou.com, joseph.qi@linux.alibaba.com, linux-fsdevel@vger.kernel.org, luodaowen.backend@bytedance.com, gerry@linux.alibaba.com, torvalds@linux-foundation.org Subject: [PATCH v6 08/22] erofs: use meta buffers for erofs_read_superblock() Date: Fri, 25 Mar 2022 20:22:09 +0800 [thread overview] Message-ID: <20220325122223.102958-9-jefflexu@linux.alibaba.com> (raw) In-Reply-To: <20220325122223.102958-1-jefflexu@linux.alibaba.com> The only change is that, meta buffers read cache page without __GFP_FS flag, which shall not matter. Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com> Reviewed-by: Chao Yu <chao@kernel.org> Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com> --- fs/erofs/super.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/fs/erofs/super.c b/fs/erofs/super.c index 915eefe0d7e2..12755217631f 100644 --- a/fs/erofs/super.c +++ b/fs/erofs/super.c @@ -281,21 +281,19 @@ static int erofs_init_devices(struct super_block *sb, static int erofs_read_superblock(struct super_block *sb) { struct erofs_sb_info *sbi; - struct page *page; + struct erofs_buf buf = __EROFS_BUF_INITIALIZER; struct erofs_super_block *dsb; unsigned int blkszbits; void *data; int ret; - page = read_mapping_page(sb->s_bdev->bd_inode->i_mapping, 0, NULL); - if (IS_ERR(page)) { + data = erofs_read_metabuf(&buf, sb, 0, EROFS_KMAP); + if (IS_ERR(data)) { erofs_err(sb, "cannot read erofs superblock"); - return PTR_ERR(page); + return PTR_ERR(data); } sbi = EROFS_SB(sb); - - data = kmap(page); dsb = (struct erofs_super_block *)(data + EROFS_SUPER_OFFSET); ret = -EINVAL; @@ -365,8 +363,7 @@ static int erofs_read_superblock(struct super_block *sb) if (erofs_sb_has_ztailpacking(sbi)) erofs_info(sb, "EXPERIMENTAL compressed inline data feature in use. Use at your own risk!"); out: - kunmap(page); - put_page(page); + erofs_put_metabuf(&buf); return ret; } -- 2.27.0
next prev parent reply other threads:[~2022-03-25 12:24 UTC|newest] Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-03-25 12:22 [PATCH v6 00/22] fscache,erofs: fscache-based on-demand read semantics Jeffle Xu 2022-03-25 12:22 ` [PATCH v6 00/22] fscache, erofs: " Jeffle Xu 2022-03-25 12:22 ` [PATCH v6 01/22] fscache: export fscache_end_operation() Jeffle Xu 2022-03-25 12:22 ` Jeffle Xu 2022-03-25 12:22 ` [PATCH v6 02/22] cachefiles: extract write routine Jeffle Xu 2022-03-25 12:22 ` Jeffle Xu 2022-03-25 12:22 ` [PATCH v6 03/22] cachefiles: notify user daemon with anon_fd when looking up cookie Jeffle Xu 2022-03-25 12:22 ` Jeffle Xu 2022-03-25 20:52 ` kernel test robot 2022-03-25 20:52 ` kernel test robot 2022-03-25 23:25 ` kernel test robot 2022-03-25 23:25 ` kernel test robot 2022-03-29 6:14 ` [Linux-cachefs] " JeffleXu 2022-03-29 6:14 ` JeffleXu 2022-03-25 12:22 ` [PATCH v6 04/22] cachefiles: notify user daemon when withdrawing cookie Jeffle Xu 2022-03-25 12:22 ` Jeffle Xu 2022-03-25 12:22 ` [PATCH v6 05/22] cachefiles: implement on-demand read Jeffle Xu 2022-03-25 12:22 ` Jeffle Xu 2022-03-25 12:22 ` [PATCH v6 06/22] cachefiles: enable on-demand read mode Jeffle Xu 2022-03-25 12:22 ` Jeffle Xu 2022-03-25 12:22 ` [PATCH v6 07/22] cachefiles: document " Jeffle Xu 2022-03-25 12:22 ` Jeffle Xu 2022-03-25 12:22 ` Jeffle Xu [this message] 2022-03-25 12:22 ` [PATCH v6 08/22] erofs: use meta buffers for erofs_read_superblock() Jeffle Xu 2022-03-25 12:22 ` [PATCH v6 09/22] erofs: make erofs_map_blocks() generally available Jeffle Xu 2022-03-25 12:22 ` Jeffle Xu 2022-03-25 12:22 ` [PATCH v6 10/22] erofs: add mode checking helper Jeffle Xu 2022-03-25 12:22 ` Jeffle Xu 2022-03-28 2:42 ` Gao Xiang 2022-03-28 2:42 ` Gao Xiang 2022-03-28 2:46 ` JeffleXu 2022-03-25 12:22 ` [PATCH v6 11/22] erofs: register global fscache volume Jeffle Xu 2022-03-25 12:22 ` Jeffle Xu 2022-03-25 12:22 ` [PATCH v6 12/22] erofs: add cookie context helper functions Jeffle Xu 2022-03-25 12:22 ` Jeffle Xu 2022-03-25 13:41 ` Gao Xiang 2022-03-25 13:41 ` Gao Xiang 2022-03-28 3:11 ` JeffleXu 2022-03-25 12:22 ` [PATCH v6 13/22] erofs: add anonymous inode managing page cache of blob file Jeffle Xu 2022-03-25 12:22 ` Jeffle Xu 2022-03-25 13:46 ` [Linux-cachefs] " Gao Xiang 2022-03-25 13:46 ` Gao Xiang 2022-03-25 12:22 ` [PATCH v6 14/22] erofs: add erofs_fscache_read_folios() helper Jeffle Xu 2022-03-25 12:22 ` Jeffle Xu 2022-03-28 2:49 ` [Linux-cachefs] " Gao Xiang 2022-03-28 2:49 ` Gao Xiang 2022-03-25 12:22 ` [PATCH v6 15/22] erofs: register cookie context for bootstrap blob Jeffle Xu 2022-03-25 12:22 ` Jeffle Xu 2022-03-28 3:04 ` Gao Xiang 2022-03-28 3:04 ` Gao Xiang 2022-03-28 3:15 ` JeffleXu 2022-03-25 12:22 ` [PATCH v6 16/22] erofs: implement fscache-based metadata read Jeffle Xu 2022-03-25 12:22 ` Jeffle Xu 2022-03-25 12:22 ` [PATCH v6 17/22] erofs: implement fscache-based data read for non-inline layout Jeffle Xu 2022-03-25 12:22 ` Jeffle Xu 2022-03-28 3:14 ` Gao Xiang 2022-03-28 3:14 ` Gao Xiang 2022-03-25 12:22 ` [PATCH v6 18/22] erofs: implement fscache-based data read for inline layout Jeffle Xu 2022-03-25 12:22 ` Jeffle Xu 2022-03-25 12:22 ` [PATCH v6 19/22] erofs: register cookie context for data blobs Jeffle Xu 2022-03-25 12:22 ` Jeffle Xu 2022-03-28 9:48 ` Gao Xiang 2022-03-28 9:48 ` Gao Xiang 2022-03-25 12:22 ` [PATCH v6 20/22] erofs: implement fscache-based data read " Jeffle Xu 2022-03-25 12:22 ` Jeffle Xu 2022-03-28 9:50 ` Gao Xiang 2022-03-28 9:50 ` Gao Xiang 2022-03-25 12:22 ` [PATCH v6 21/22] erofs: implement fscache-based data readahead Jeffle Xu 2022-03-25 12:22 ` Jeffle Xu 2022-03-28 10:55 ` Gao Xiang 2022-03-28 10:55 ` Gao Xiang 2022-03-25 12:22 ` [PATCH v6 22/22] erofs: add 'tag' mount option Jeffle Xu 2022-03-25 12:22 ` Jeffle Xu
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