I have two questions about I/O using the Linux XFS DMAPI implementation:
1. Some filesystems store a little bit of the file data in the i-node.
This results in the first X bytes staying resident even after a
dm_punch_hole command tries to free them. Is this the case with XFS, and
if so, how many bytes are stored this way?
2. I just noticed that the DM_WRITE_SYNC flag is not supported for calls to
dm_write_invis(). This is a fairly critical piece of missing
functionality. Is there any chance this flag may be implemented in the
future? I am currently porting a DMAPI application from another platform,
and this could cause some major problems.
Thanks,
-James Goodwin
Software Engineer
IBM Global Services - Federal
jagoodwi@xxxxxxxxxx
Phone: (281) 336 2578
Fax: (281) 335 4231
T/L 260-2578
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