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authorAndi Kleen <ak@suse.de>2008-07-24 00:27:41 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-24 13:47:17 -0400
commita5516438959d90b071ff0a484ce4f3f523dc3152 (patch)
treee356ba9364c76b93c176b4d4a262b7aca3ee8f91 /ipc
parentb7ba30c679ed1eb7ed3ed8f281f6493282042bd4 (diff)
hugetlb: modular state for hugetlb page size
The goal of this patchset is to support multiple hugetlb page sizes. This is achieved by introducing a new struct hstate structure, which encapsulates the important hugetlb state and constants (eg. huge page size, number of huge pages currently allocated, etc). The hstate structure is then passed around the code which requires these fields, they will do the right thing regardless of the exact hstate they are operating on. This patch adds the hstate structure, with a single global instance of it (default_hstate), and does the basic work of converting hugetlb to use the hstate. Future patches will add more hstate structures to allow for different hugetlbfs mounts to have different page sizes. [akpm@linux-foundation.org: coding-style fixes] 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 'ipc')
-rw-r--r--ipc/shm.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/ipc/shm.c b/ipc/shm.c
index 790240cd067f..a726aebce7d7 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -577,7 +577,8 @@ static void shm_get_stat(struct ipc_namespace *ns, unsigned long *rss,
577 577
578 if (is_file_hugepages(shp->shm_file)) { 578 if (is_file_hugepages(shp->shm_file)) {
579 struct address_space *mapping = inode->i_mapping; 579 struct address_space *mapping = inode->i_mapping;
580 *rss += (HPAGE_SIZE/PAGE_SIZE)*mapping->nrpages; 580 struct hstate *h = hstate_file(shp->shm_file);
581 *rss += pages_per_huge_page(h) * mapping->nrpages;
581 } else { 582 } else {
582 struct shmem_inode_info *info = SHMEM_I(inode); 583 struct shmem_inode_info *info = SHMEM_I(inode);
583 spin_lock(&info->lock); 584 spin_lock(&info->lock);