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f2fs: reduce covered region of sbi->cp_rwsem in f2fs_map_blocks
Only cover sbi->cp_rwsem on one dnode page's allocation and modification instead of multiple's in f2fs_map_blocks, it can reduce the covered region of cp_rwsem, then we can avoid potential long time delay for concurrent checkpointer. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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parent
93bae099ea
commit
3104af35eb
1 changed files with 7 additions and 2 deletions
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@ -590,7 +590,7 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
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}
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if (create)
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f2fs_lock_op(F2FS_I_SB(inode));
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f2fs_lock_op(sbi);
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/* When reading holes, we need its node page */
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set_new_dnode(&dn, inode, NULL, NULL, 0);
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@ -647,6 +647,11 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
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allocated = false;
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f2fs_put_dnode(&dn);
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if (create) {
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f2fs_unlock_op(sbi);
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f2fs_lock_op(sbi);
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}
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set_new_dnode(&dn, inode, NULL, NULL, 0);
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err = get_dnode_of_data(&dn, pgofs, mode);
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if (err) {
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@ -702,7 +707,7 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
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f2fs_put_dnode(&dn);
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unlock_out:
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if (create)
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f2fs_unlock_op(F2FS_I_SB(inode));
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f2fs_unlock_op(sbi);
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out:
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trace_f2fs_map_blocks(inode, map, err);
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return err;
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