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jfs: fix regression preventing coalescing of extents

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Commit fec1878fe9 caused a regression in
which contiguous blocks being allocated to the end of an extent were
getting a new extent created.  This typically results in files entirely
made up of 1-block extents even though the blocks are contiguous on
disk.

Apparently grub doesn't handle a jfs file being fragmented into too many
extents, since it refuses to boot a kernel from jfs that was created by
the 2.6.30 kernel.

Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Reported-by: Alex <alevkovich@tut.by>
This commit is contained in:
Dave Kleikamp 2009-06-16 13:43:22 -05:00
parent a525890cb6
commit f7c52fd17a
1 changed files with 1 additions and 0 deletions
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fs/jfs/jfs_extent.c
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@ -391,6 +391,7 @@ int extHint(struct inode *ip, s64 offset, xad_t * xp)
}
XADaddress(xp, xaddr);
XADlength(xp, xlen);
XADoffset(xp, prev);
/*
* only preserve the abnr flag within the xad flags
* of the returned hint.