From: Davidlohr Bueso <davidlohr@hp.com>
To: akpm@linux-foundation.org, iamjoonsoo.kim@lge.com
Cc: riel@redhat.com, mgorman@suse.de, mhocko@suse.cz,
aneesh.kumar@linux.vnet.ibm.com, kamezawa.hiroyu@jp.fujitsu.com,
hughd@google.com, david@gibson.dropbear.id.au, js1304@gmail.com,
liwanp@linux.vnet.ibm.com, n-horiguchi@ah.jp.nec.com,
dhillf@gmail.com, rientjes@google.com, davidlohr@hp.com,
aswin@hp.com, scott.norton@hp.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v2 2/6] mm, hugetlb: improve, cleanup resv_map parameters
Date: Fri, 31 Jan 2014 09:36:42 -0800 [thread overview]
Message-ID: <1391189806-13319-3-git-send-email-davidlohr@hp.com> (raw)
In-Reply-To: <1391189806-13319-1-git-send-email-davidlohr@hp.com>
From: Joonsoo Kim <iamjoonsoo.kim@lge.com>
To change a protection method for region tracking to find grained one,
we pass the resv_map, instead of list_head, to region manipulation
functions. This doesn't introduce any functional change, and it is just
for preparing a next step.
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Davidlohr Bueso <davidlohr@hp.com>
---
mm/hugetlb.c | 30 +++++++++++++++++-------------
1 file changed, 17 insertions(+), 13 deletions(-)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 138987f..dca03a6 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -151,8 +151,9 @@ struct file_region {
long to;
};
-static long region_add(struct list_head *head, long f, long t)
+static long region_add(struct resv_map *resv, long f, long t)
{
+ struct list_head *head = &resv->regions;
struct file_region *rg, *nrg, *trg;
/* Locate the region we are either in or before. */
@@ -187,8 +188,9 @@ static long region_add(struct list_head *head, long f, long t)
return 0;
}
-static long region_chg(struct list_head *head, long f, long t)
+static long region_chg(struct resv_map *resv, long f, long t)
{
+ struct list_head *head = &resv->regions;
struct file_region *rg, *nrg;
long chg = 0;
@@ -236,8 +238,9 @@ static long region_chg(struct list_head *head, long f, long t)
return chg;
}
-static long region_truncate(struct list_head *head, long end)
+static long region_truncate(struct resv_map *resv, long end)
{
+ struct list_head *head = &resv->regions;
struct file_region *rg, *trg;
long chg = 0;
@@ -266,8 +269,9 @@ static long region_truncate(struct list_head *head, long end)
return chg;
}
-static long region_count(struct list_head *head, long f, long t)
+static long region_count(struct resv_map *resv, long f, long t)
{
+ struct list_head *head = &resv->regions;
struct file_region *rg;
long chg = 0;
@@ -393,7 +397,7 @@ void resv_map_release(struct kref *ref)
struct resv_map *resv_map = container_of(ref, struct resv_map, refs);
/* Clear out any active regions before we release the map. */
- region_truncate(&resv_map->regions, 0);
+ region_truncate(resv_map, 0);
kfree(resv_map);
}
@@ -1152,7 +1156,7 @@ static long vma_needs_reservation(struct hstate *h,
pgoff_t idx = vma_hugecache_offset(h, vma, addr);
struct resv_map *resv = inode->i_mapping->private_data;
- return region_chg(&resv->regions, idx, idx + 1);
+ return region_chg(resv, idx, idx + 1);
} else if (!is_vma_resv_set(vma, HPAGE_RESV_OWNER)) {
return 1;
@@ -1162,7 +1166,7 @@ static long vma_needs_reservation(struct hstate *h,
pgoff_t idx = vma_hugecache_offset(h, vma, addr);
struct resv_map *resv = vma_resv_map(vma);
- err = region_chg(&resv->regions, idx, idx + 1);
+ err = region_chg(resv, idx, idx + 1);
if (err < 0)
return err;
return 0;
@@ -1178,14 +1182,14 @@ static void vma_commit_reservation(struct hstate *h,
pgoff_t idx = vma_hugecache_offset(h, vma, addr);
struct resv_map *resv = inode->i_mapping->private_data;
- region_add(&resv->regions, idx, idx + 1);
+ region_add(resv, idx, idx + 1);
} else if (is_vma_resv_set(vma, HPAGE_RESV_OWNER)) {
pgoff_t idx = vma_hugecache_offset(h, vma, addr);
struct resv_map *resv = vma_resv_map(vma);
/* Mark this page used in the map. */
- region_add(&resv->regions, idx, idx + 1);
+ region_add(resv, idx, idx + 1);
}
}
@@ -2276,7 +2280,7 @@ static void hugetlb_vm_op_close(struct vm_area_struct *vma)
end = vma_hugecache_offset(h, vma, vma->vm_end);
reserve = (end - start) -
- region_count(&resv->regions, start, end);
+ region_count(resv, start, end);
resv_map_put(vma);
@@ -3178,7 +3182,7 @@ int hugetlb_reserve_pages(struct inode *inode,
if (!vma || vma->vm_flags & VM_MAYSHARE) {
resv_map = inode->i_mapping->private_data;
- chg = region_chg(&resv_map->regions, from, to);
+ chg = region_chg(resv_map, from, to);
} else {
resv_map = resv_map_alloc();
@@ -3224,7 +3228,7 @@ int hugetlb_reserve_pages(struct inode *inode,
* else has to be done for private mappings here
*/
if (!vma || vma->vm_flags & VM_MAYSHARE)
- region_add(&resv_map->regions, from, to);
+ region_add(resv_map, from, to);
return 0;
out_err:
if (vma)
@@ -3240,7 +3244,7 @@ void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed)
struct hugepage_subpool *spool = subpool_inode(inode);
if (resv_map)
- chg = region_truncate(&resv_map->regions, offset);
+ chg = region_truncate(resv_map, offset);
spin_lock(&inode->i_lock);
inode->i_blocks -= (blocks_per_huge_page(h) * freed);
spin_unlock(&inode->i_lock);
--
1.8.1.4
next prev parent reply other threads:[~2014-01-31 17:38 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-31 17:36 [PATCH v2 0/6] mm, hugetlb: fixes and fault scalability Davidlohr Bueso
2014-01-31 17:36 ` [PATCH v2 1/6] mm, hugetlb: unify region structure handling Davidlohr Bueso
2014-01-31 17:36 ` Davidlohr Bueso [this message]
2014-01-31 17:36 ` [PATCH v2 3/6] mm, hugetlb: fix race in region tracking Davidlohr Bueso
2014-01-31 17:36 ` [PATCH v2 4/6] mm, hugetlb: remove resv_map_put Davidlohr Bueso
2014-01-31 17:36 ` [PATCH v2 5/6] mm, hugetlb: use vma_resv_map() map types Davidlohr Bueso
2014-01-31 17:36 ` [PATCH v2 6/6] mm, hugetlb: improve page-fault scalability Davidlohr Bueso
2014-01-31 21:01 ` Andrew Morton
2014-01-31 21:52 ` Davidlohr Bueso
2014-02-03 6:41 ` Joonsoo Kim
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