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authorKen Chen <kenchen@google.com>2007-11-15 03:59:44 +0300
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-11-15 05:45:40 +0300
commit45c682a68a87251d9a01383ce076ab21ee09812e (patch)
treed9fa6a02263c50ef97e1c525b91b29b6aedf9e40 /mm/hugetlb.c
parent8cde045c7ee97573be6ce495b8f7c918182a2c7a (diff)
downloadlinux-45c682a68a87251d9a01383ce076ab21ee09812e.tar.xz
hugetlb: fix i_blocks accounting
For administrative purpose, we want to query actual block usage for hugetlbfs file via fstat. Currently, hugetlbfs always return 0. Fix that up since kernel already has all the information to track it properly. Signed-off-by: Ken Chen <kenchen@google.com> Acked-by: Adam Litke <agl@us.ibm.com> Cc: Badari Pulavarty <pbadari@us.ibm.com> Cc: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/hugetlb.c')
-rw-r--r--mm/hugetlb.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index abe1e9f2a942..6121b57bbe96 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -801,6 +801,7 @@ retry:
if (vma->vm_flags & VM_SHARED) {
int err;
+ struct inode *inode = mapping->host;
err = add_to_page_cache(page, mapping, idx, GFP_KERNEL);
if (err) {
@@ -809,6 +810,10 @@ retry:
goto retry;
goto out;
}
+
+ spin_lock(&inode->i_lock);
+ inode->i_blocks += BLOCKS_PER_HUGEPAGE;
+ spin_unlock(&inode->i_lock);
} else
lock_page(page);
}
@@ -1160,6 +1165,11 @@ int hugetlb_reserve_pages(struct inode *inode, long from, long to)
void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed)
{
long chg = region_truncate(&inode->i_mapping->private_list, offset);
+
+ spin_lock(&inode->i_lock);
+ inode->i_blocks -= BLOCKS_PER_HUGEPAGE * freed;
+ spin_unlock(&inode->i_lock);
+
hugetlb_put_quota(inode->i_mapping, (chg - freed));
hugetlb_acct_memory(-(chg - freed));
}