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Subject[GFS2 & DLM] Proposed patches for 2.6.20 merge window [0/54]

Following this message are the patches which currently make up the GFS2
-nmw (next merge window) git tree. Mostly they are bug fixes and clean
ups, but there are one or two other changes, the highlights being:

[26/54] Changes "writeback" mounts to not require buffer heads in
writepages and also results in fewer I/Os.
[29/54] This is probably the most notable since it effectively shrinks
the amount of memory per struct gfs2_inode by half.
[27/54] Removes the attempt at directory readahead in readdir and
results in a substantial speed improvement for readdir without noticably
slowing readdir+stat performance.


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