checpoint

[unix-history] / usr / src / sys / ufs / lfs / TODO

diff --git a/usr/src/sys/ufs/lfs/TODO b/usr/src/sys/ufs/lfs/TODO
index 5db26a2..32dd83f 100644 (file)
--- a/usr/src/sys/ufs/lfs/TODO
+++ b/usr/src/sys/ufs/lfs/TODO
@@ -1,19 +1,35 @@
-#      @(#)TODO        5.2 (Berkeley) %G%
-
-TODO:  =======================
+#      @(#)TODO        5.5 (Berkeley) %G%

 
 Keith:
 
 Keith:

-       XXX The problem is that the IFILE vnode isn't getting entered into
-           the vnode cache (nor is the underlying inode being placed into
-           the inode cache).  Q: Should the underlying inode be in the
-           inode cache (does it get flushed)?  Q: Should the mount code
-           update the ifile inode slot to reflect the current disk address?
-
-       Move utils into main-line source.
+       Why not delete the lfs_bmapv call, just mark everything dirty
+               that isn't deleted/truncated?  Get some numbers about
+               what percentage of the stuff that the cleaner thinks
+               might be live is live.  If it's high, get rid of lfs_bmapv.
+       Currently, inodes are being flushed to disk synchronously upon
+               creation -- see ufs_makeinode.  However, only the inode
+               is flushed, the directory "name" is written using VOP_BWRITE,
+               so it's not synchronous.  Possible solutions: 1: get some
+               ordering in the writes so that inode/directory entries get
+               stuffed into the same segment.  2: do both synchronously
+               3: add Mendel's information into the stream so we log
+               creation/deletion of inodes.  4: do some form of partial
+               segment when changing the inode (creation/deletion/rename).
+       Fix i_block increment for indirect blocks.
+       If the file system is tar'd, extracted on top of another LFS, the
+               IFILE ain't worth diddly.  Is the cleaner writing the IFILE?
+               If not, let's make it read-only.
+       Delete unnecessary source from utils in main-line source tree.
+       Make sure that we're counting meta blocks in the inode i_block count.
+       Overlap the version and nextfree fields in the IFILE
+       Vinvalbuf (Kirk):
+               Why writing blocks that are no longer useful?
+               Are the semantics of close such that blocks have to be flushed?
+               How specify in the buf chain the blocks that don't need
+               to be written?  (Different numbering of indirect blocks.)

 
 Margo:
 
 Margo:

-       See if lfs_mountfs can just call lfs_vget for IFILE vnode
-               by minor hack to lfs_itod.
+       Fix the use of the dinode spare field to use the generation number
+               instead.

        Unmount; not doing a bgetvp (VHOLD) in lfs_newbuf call.
        Document in the README file where the checkpoint information is
                on disk.
        Unmount; not doing a bgetvp (VHOLD) in lfs_newbuf call.
        Document in the README file where the checkpoint information is
                on disk.