diff options
| -rw-r--r-- | fs/nfs/write.c | 36 |
1 files changed, 11 insertions, 25 deletions
diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 46aa438..72813ed 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -1691,34 +1691,20 @@ out_error: int nfs_migrate_page(struct address_space *mapping, struct page *newpage, struct page *page) { - struct nfs_page *req; - int ret; + /* + * If PagePrivate is set, then the page is currently associated with + * an in-progress read or write request. Don't try to migrate it. + * + * FIXME: we could do this in principle, but we'll need a way to ensure + * that we can safely release the inode reference while holding + * the page lock. + */ + if (PagePrivate(page)) + return -EBUSY; nfs_fscache_release_page(page, GFP_KERNEL); - req = nfs_find_and_lock_request(page, false); - ret = PTR_ERR(req); - if (IS_ERR(req)) - goto out; - - ret = migrate_page(mapping, newpage, page); - if (!req) - goto out; - if (ret) - goto out_unlock; - page_cache_get(newpage); - spin_lock(&mapping->host->i_lock); - req->wb_page = newpage; - SetPagePrivate(newpage); - set_page_private(newpage, (unsigned long)req); - ClearPagePrivate(page); - set_page_private(page, 0); - spin_unlock(&mapping->host->i_lock); - page_cache_release(page); -out_unlock: - nfs_clear_page_tag_locked(req); -out: - return ret; + return migrate_page(mapping, newpage, page); } #endif |
