Hi Dave, We have sent a RFD mail on the mailing list about the current task that we are doing: defragmenting parts of a file. (Haven't got a response yet) http://oss.sgi.com/archives/xfs/2015-02/msg00264.html We were actually stuck on a logical aspect, of how to go ahead performing defragmentation without creating a temporary file, and then copy extents to it. ----------------------------------------------------------------------------------------------------- File: fsr/xfs_fsr.c In fsr/xfs_fsr.c code , we also had a doubt about how to modify the number of extents for the temp file getting created. Line 1321 onwards: It would be of great help if u could shed some light on the ioctl's - XFS_IOC_UNRESVSP64 and XFS_IOC_RESVSP64, We took a test case where a file had 3 extents. The for loop at line 1321 now had nextents value as 1 (i.e ideal extent count 1) and outmap[extent].bmv_length was addition of all blocks, i.e. outmap[ ] array had one index (for 1 ideal extent) After that we tried running a defragmentation test, by making read_fd_bmap() function return nextents value as 2, and subsequently made outmap[ ] have two entries instead of one. However the temp file that got created (Line 1321 onwards) still had new_nextents as 1 (Line 1382) instead of having 2. Any thoughts ? :) Regards, A-DRS _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
