]> nv-tegra.nvidia Code Review - linux-2.6.git/commit
hugetlb: allow extending ftruncate on hugetlbfs
authorKen Chen <kenchen@google.com>
Tue, 16 Oct 2007 08:26:21 +0000 (01:26 -0700)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Tue, 16 Oct 2007 16:43:02 +0000 (09:43 -0700)
commit7aa91e104028b87ff13f5eeb7a0d7ffe7b5a2348
treee6084d025a03e3b097c0a710e50fcae1d82f2fba
parent54f9f80d6543fb7b157d3b11e2e7911dc1379790
hugetlb: allow extending ftruncate on hugetlbfs

For historical reason, expanding ftruncate that increases file size on
hugetlbfs is not allowed due to pages were pre-faulted and lack of fault
handler.  Now that we have demand faulting on hugetlb since 2.6.15, there
is no reason to hold back that limitation.

This will make hugetlbfs behave more like a normal fs.  I'm writing a user
level code that uses hugetlbfs but will fall back to tmpfs if there are no
hugetlb page available in the system.  Having hugetlbfs specific ftruncate
behavior is a bit quirky and I would like to remove that artificial
limitation.

Signed-off-by: <kenchen@google.com>
Acked-by: Wiliam Irwin <wli@holomorphy.com>
Cc: Adam Litke <agl@us.ibm.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/hugetlbfs/inode.c