mirror of https://gitee.com/openkylin/linux.git
41 lines
2.1 KiB
Plaintext
41 lines
2.1 KiB
Plaintext
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$Id: TODO,v 1.10 2002/09/09 16:31:21 dwmw2 Exp $
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- disable compression in commit_write()?
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- fine-tune the allocation / GC thresholds
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- chattr support - turning on/off and tuning compression per-inode
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- checkpointing (do we need this? scan is quite fast)
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- make the scan code populate real inodes so read_inode just after
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mount doesn't have to read the flash twice for large files.
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Make this a per-inode option, changable with chattr, so you can
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decide which inodes should be in-core immediately after mount.
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- test, test, test
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- NAND flash support:
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- flush_wbuf using GC to fill it, don't just pad.
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- Deal with write errors. Data don't get lost - we just have to write
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the affected node(s) out again somewhere else.
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- make fsync flush only if actually required
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- make sys_sync() work.
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- reboot notifier
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- timed flush of old wbuf
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- fix magical second arg of jffs2_flush_wbuf(). Split into two or more functions instead.
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- Optimisations:
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- Stop GC from decompressing and immediately recompressing nodes which could
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just be copied intact. (We now keep track of REF_PRISTINE flag. Easy now.)
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- Furthermore, in the case where it could be copied intact we don't even need
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to call iget() for it -- if we use (raw_node_raw->flash_offset & 2) as a flag
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to show a node can be copied intact and it's _not_ in icache, we could just do
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it, fix up the next_in_ino list and move on. We would need a way to find out
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_whether_ it's in icache though -- if it's in icache we also need to do the
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fragment lists, etc. P'raps a flag or pointer in the jffs2_inode_cache could
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help. (We have half of this now.)
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- Stop keeping name in-core with struct jffs2_full_dirent. If we keep the hash in
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the full dirent, we only need to go to the flash in lookup() when we think we've
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got a match, and in readdir().
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- Doubly-linked next_in_ino list to allow us to free obsoleted raw_node_refs immediately?
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- Remove totlen from jffs2_raw_node_ref? Need to have totlen passed into
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jffs2_mark_node_obsolete(). Can all callers work it out?
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- Remove size from jffs2_raw_node_frag.
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