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authorSteven Whitehouse <swhiteho@redhat.com>2006-09-21 17:05:23 -0400
committerSteven Whitehouse <swhiteho@redhat.com>2006-09-21 17:05:23 -0400
commit7276b3b0c77101f8b3f4e45e89a29cf9045e831a (patch)
tree3dd0a981218e490ddf47f925ba20c254e491ce98 /fs/gfs2/locking/dlm
parent91fa47964165a42401fbc1f41caa63ab78564305 (diff)
[GFS2] Tidy up meta_io code
Fix a bug in the directory reading code, where we might have dereferenced a NULL pointer in case of OOM. Updated the directory code to use the new & improved version of gfs2_meta_ra() which now returns the first block that was being read. Previously it was releasing it requiring following code to grab the block again at each point it was called. Also turned off readahead on directory lookups since we are reading a hash table, and therefore reading the entries in order is very unlikely. Readahead is still used for all other calls to the directory reading function (e.g. when growing the hash table). Removed the DIO_START constant. Everywhere this was used, it was used to unconditionally start i/o aside from a couple of places, so I've removed it and made the couple of exceptions to this rule into separate functions. Also hunted through the other DIO flags and removed them as arguments from functions which were always called with the same combination of arguments. Updated gfs2_meta_indirect_buffer to be a bit more efficient and hopefully also be a bit easier to read. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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