diff options
| author | Chao Yu <yuchao0@huawei.com> | 2021-05-12 12:52:58 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2021-06-23 11:09:33 +0300 |
| commit | 8f1d49832636d514e949b29ce64370ebebf6d6d2 (patch) | |
| tree | 90a5b62a1c6cf0fa7b55df2f93defa84bb6fce50 /fs/f2fs | |
| parent | 8939a8489ca64b56f49428b0d882709080a928d4 (diff) | |
| download | linux-8f1d49832636d514e949b29ce64370ebebf6d6d2.tar.xz | |
f2fs: compress: remove unneeded preallocation
We will reserve iblocks for compression saved, so during compressed
cluster overwrite, we don't need to preallocate blocks for later
write.
In addition, it adds a bug_on to detect wrong reserved iblock number
in __f2fs_cluster_blocks().
Bug fix in the original patch by Jaegeuk:
If we released compressed blocks having an immutable bit, we can see less
number of compressed block addresses. Let's fix wrong BUG_ON.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/compress.c | 27 | ||||
| -rw-r--r-- | fs/f2fs/file.c | 4 |
2 files changed, 3 insertions, 28 deletions
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c index 279f79f4fb1c..bec92ff5ee7d 100644 --- a/fs/f2fs/compress.c +++ b/fs/f2fs/compress.c @@ -926,6 +926,9 @@ static int __f2fs_cluster_blocks(struct inode *inode, ret++; } } + + f2fs_bug_on(F2FS_I_SB(inode), + !compr && ret != cluster_size && !IS_IMMUTABLE(inode)); } fail: f2fs_put_dnode(&dn); @@ -984,21 +987,16 @@ static int prepare_compress_overwrite(struct compress_ctx *cc, struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode); struct address_space *mapping = cc->inode->i_mapping; struct page *page; - struct dnode_of_data dn; sector_t last_block_in_bio; unsigned fgp_flag = FGP_LOCK | FGP_WRITE | FGP_CREAT; pgoff_t start_idx = start_idx_of_cluster(cc); int i, ret; - bool prealloc; retry: ret = f2fs_is_compressed_cluster(cc->inode, start_idx); if (ret <= 0) return ret; - /* compressed case */ - prealloc = (ret < cc->cluster_size); - ret = f2fs_init_compress_ctx(cc); if (ret) return ret; @@ -1056,25 +1054,6 @@ release_and_retry: } } - if (prealloc) { - f2fs_do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, true); - - set_new_dnode(&dn, cc->inode, NULL, NULL, 0); - - for (i = cc->cluster_size - 1; i > 0; i--) { - ret = f2fs_get_block(&dn, start_idx + i); - if (ret) { - i = cc->cluster_size; - break; - } - - if (dn.data_blkaddr != NEW_ADDR) - break; - } - - f2fs_do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, false); - } - if (likely(!ret)) { *fsdata = cc->rpages; *pagep = cc->rpages[offset_in_cluster(cc, index)]; diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index a6be76289452..4a8c3128b5a5 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -85,10 +85,6 @@ static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf) err = ret; goto err; } else if (ret) { - if (ret < F2FS_I(inode)->i_cluster_size) { - err = -EAGAIN; - goto err; - } need_alloc = false; } } |