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Diffstat (limited to 'fs/nfs/pagelist.c')
-rw-r--r--fs/nfs/pagelist.c47
1 files changed, 28 insertions, 19 deletions
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 106aca388eb..656481c0daa 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -325,6 +325,7 @@ out:
/**
* nfs_scan_list - Scan a list for matching requests
+ * @nfsi: NFS inode
* @head: One of the NFS inode request lists
* @dst: Destination list
* @idx_start: lower bound of page->index to scan
@@ -336,14 +337,15 @@ out:
* The requests are *not* checked to ensure that they form a contiguous set.
* You must be holding the inode's req_lock when calling this function
*/
-int
-nfs_scan_list(struct list_head *head, struct list_head *dst,
- unsigned long idx_start, unsigned int npages)
+int nfs_scan_list(struct nfs_inode *nfsi, struct list_head *head,
+ struct list_head *dst, unsigned long idx_start,
+ unsigned int npages)
{
- struct list_head *pos, *tmp;
- struct nfs_page *req;
- unsigned long idx_end;
- int res;
+ struct nfs_page *pgvec[NFS_SCAN_MAXENTRIES];
+ struct nfs_page *req;
+ unsigned long idx_end;
+ int found, i;
+ int res;
res = 0;
if (npages == 0)
@@ -351,21 +353,28 @@ nfs_scan_list(struct list_head *head, struct list_head *dst,
else
idx_end = idx_start + npages - 1;
- list_for_each_safe(pos, tmp, head) {
-
- req = nfs_list_entry(pos);
-
- if (req->wb_index < idx_start)
- continue;
- if (req->wb_index > idx_end)
+ for (;;) {
+ found = radix_tree_gang_lookup(&nfsi->nfs_page_tree,
+ (void **)&pgvec[0], idx_start,
+ NFS_SCAN_MAXENTRIES);
+ if (found <= 0)
break;
+ for (i = 0; i < found; i++) {
+ req = pgvec[i];
+ if (req->wb_index > idx_end)
+ goto out;
+ idx_start = req->wb_index + 1;
+ if (req->wb_list_head != head)
+ continue;
+ if (nfs_set_page_writeback_locked(req)) {
+ nfs_list_remove_request(req);
+ nfs_list_add_request(req, dst);
+ res++;
+ }
+ }
- if (!nfs_set_page_writeback_locked(req))
- continue;
- nfs_list_remove_request(req);
- nfs_list_add_request(req, dst);
- res++;
}
+out:
return res;
}