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authorAndi Kleen <ak@suse.de>2008-07-23 21:27:43 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-24 10:47:17 -0700
commita137e1cc6d6e7d315fef03962a2a5a113348b13b (patch)
treeb47e195c392abaa3640cc2f9187d99d58cee664a /include
parente5ff215941d59f8ae6bf58f6428dc5c26745a612 (diff)
hugetlbfs: per mount huge page sizes
Add the ability to configure the hugetlb hstate used on a per mount basis. - Add a new pagesize= option to the hugetlbfs mount that allows setting the page size - This option causes the mount code to find the hstate corresponding to the specified size, and sets up a pointer to the hstate in the mount's superblock. - Change the hstate accessors to use this information rather than the global_hstate they were using (requires a slight change in mm/memory.c so we don't NULL deref in the error-unmap path -- see comments). [np: take hstate out of hugetlbfs inode and vma->vm_private_data] Acked-by: Adam Litke <agl@us.ibm.com> Acked-by: Nishanth Aravamudan <nacc@us.ibm.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/hugetlb.h14
1 files changed, 9 insertions, 5 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index b75bdb4deba..ba9263e631b 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -100,6 +100,7 @@ struct hugetlbfs_config {
umode_t mode;
long nr_blocks;
long nr_inodes;
+ struct hstate *hstate;
};
struct hugetlbfs_sb_info {
@@ -108,6 +109,7 @@ struct hugetlbfs_sb_info {
long max_inodes; /* inodes allowed */
long free_inodes; /* inodes free */
spinlock_t stat_lock;
+ struct hstate *hstate;
};
@@ -191,19 +193,21 @@ extern unsigned int default_hstate_idx;
#define default_hstate (hstates[default_hstate_idx])
-static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
+static inline struct hstate *hstate_inode(struct inode *i)
{
- return &default_hstate;
+ struct hugetlbfs_sb_info *hsb;
+ hsb = HUGETLBFS_SB(i->i_sb);
+ return hsb->hstate;
}
static inline struct hstate *hstate_file(struct file *f)
{
- return &default_hstate;
+ return hstate_inode(f->f_dentry->d_inode);
}
-static inline struct hstate *hstate_inode(struct inode *i)
+static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
{
- return &default_hstate;
+ return hstate_file(vma->vm_file);
}
static inline unsigned long huge_page_size(struct hstate *h)