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37 lines
1.9 KiB
37 lines
1.9 KiB
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- support asynchronous operation -- add a per-fs 'reserved_space' count, |
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let each outstanding write reserve the _maximum_ amount of physical |
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space it could take. Let GC flush the outstanding writes because the |
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reservations will necessarily be pessimistic. With this we could even |
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do shared writable mmap, if we can have a fs hook for do_wp_page() to |
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make the reservation. |
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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, changeable 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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- almost done :) |
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- use bad block check instead of the hardwired byte check |
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- Optimisations: |
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- Split writes so they go to two separate blocks rather than just c->nextblock. |
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By writing _new_ nodes to one block, and garbage-collected REF_PRISTINE |
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nodes to a different one, we can separate clean nodes from those which |
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are likely to become dirty, and end up with blocks which are each far |
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closer to 100% or 0% clean, hence speeding up later GC progress dramatically. |
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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 size from jffs2_raw_node_frag. |
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dedekind: |
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1. __jffs2_flush_wbuf() has a strange 'pad' parameter. Eliminate. |
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2. get_sb()->build_fs()->scan() path... Why get_sb() removes scan()'s crap in |
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case of failure? scan() does not clean everything. Fix.
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