From: Trond Myklebust Date: Tue, 3 Mar 2015 05:06:35 +0000 (-0500) Subject: NFS: Don't write enable new pages while an invalidation is proceeding X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ef070dcb3989f553f5d84edf555eebc7e204099d;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git NFS: Don't write enable new pages while an invalidation is proceeding nfs_vm_page_mkwrite() should wait until the page cache invalidation is finished. This is the second patch in a 2 patch series to deprecate the NFS client's reliance on nfs_release_page() in the context of nfs_invalidate_mapping(). Signed-off-by: Trond Myklebust --- diff --git a/fs/nfs/file.c b/fs/nfs/file.c index 41963ffca597..e679d24c39d3 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -623,6 +623,9 @@ static int nfs_vm_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) /* make sure the cache has finished storing the page */ nfs_fscache_wait_on_page_write(NFS_I(inode), page); + wait_on_bit_action(&NFS_I(inode)->flags, NFS_INO_INVALIDATING, + nfs_wait_bit_killable, TASK_KILLABLE); + lock_page(page); mapping = page_file_mapping(page); if (mapping != inode->i_mapping) diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 8edb7d049565..d42dff6d5e98 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -1035,6 +1035,7 @@ static int nfs_invalidate_mapping(struct inode *inode, struct address_space *map if (mapping->nrpages != 0) { if (S_ISREG(inode->i_mode)) { + unmap_mapping_range(mapping, 0, 0, 0); ret = nfs_sync_mapping(mapping); if (ret < 0) return ret;