Commit 2b17d725 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFS: Clean up writeback code 



Now that the VM promises never to recurse back into the filesystem
layer on writeback, remove all the GFP_NOFS references etc from
the generic writeback code.

Signed-off-by: default avatarTrond Myklebust <trond.myklebust@hammerspace.com>
parent c98ebe29

fs/nfs/pagelist.c

+2 −4
Original line number Diff line number Diff line
@@ -77,7 +77,7 @@ void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos) 
static inline struct nfs_page *

nfs_page_alloc(void)

{

	struct nfs_page	*p = kmem_cache_zalloc(nfs_page_cachep, GFP_NOIO);

	struct nfs_page	*p = kmem_cache_zalloc(nfs_page_cachep, GFP_KERNEL);

	if (p)

		INIT_LIST_HEAD(&p->wb_list);

	return p;
@@ -775,8 +775,6 @@ int nfs_generic_pgio(struct nfs_pageio_descriptor *desc, 
	if (pagecount <= ARRAY_SIZE(pg_array->page_array))

		pg_array->pagevec = pg_array->page_array;

	else {

		if (hdr->rw_mode == FMODE_WRITE)

			gfp_flags = GFP_NOIO;

		pg_array->pagevec = kcalloc(pagecount, sizeof(struct page *), gfp_flags);

		if (!pg_array->pagevec) {

			pg_array->npages = 0;
@@ -851,7 +849,7 @@ nfs_pageio_alloc_mirrors(struct nfs_pageio_descriptor *desc, 
	desc->pg_mirrors_dynamic = NULL;

	if (mirror_count == 1)

		return desc->pg_mirrors_static;

	ret = kmalloc_array(mirror_count, sizeof(*ret), GFP_NOFS);

	ret = kmalloc_array(mirror_count, sizeof(*ret), GFP_KERNEL);

	if (ret != NULL) {

		for (i = 0; i < mirror_count; i++)

			nfs_pageio_mirror_init(&ret[i], desc->pg_bsize);

fs/nfs/pnfs.c

+1 −1
Original line number Diff line number Diff line
@@ -2468,7 +2468,7 @@ pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, 
						   wb_size,

						   IOMODE_RW,

						   false,

						   GFP_NOFS);

						   GFP_KERNEL);

		if (IS_ERR(pgio->pg_lseg)) {

			pgio->pg_error = PTR_ERR(pgio->pg_lseg);

			pgio->pg_lseg = NULL;

fs/nfs/write.c

+2 −5
Original line number Diff line number Diff line
@@ -103,7 +103,7 @@ EXPORT_SYMBOL_GPL(nfs_commit_free); 


static struct nfs_pgio_header *nfs_writehdr_alloc(void)

{

	struct nfs_pgio_header *p = mempool_alloc(nfs_wdata_mempool, GFP_NOIO);

	struct nfs_pgio_header *p = mempool_alloc(nfs_wdata_mempool, GFP_KERNEL);



	memset(p, 0, sizeof(*p));

	p->rw_mode = FMODE_WRITE;
@@ -721,12 +721,11 @@ int nfs_writepages(struct address_space *mapping, struct writeback_control *wbc) 
	struct inode *inode = mapping->host;

	struct nfs_pageio_descriptor pgio;

	struct nfs_io_completion *ioc;

	unsigned int pflags = memalloc_nofs_save();

	int err;



	nfs_inc_stats(inode, NFSIOS_VFSWRITEPAGES);



	ioc = nfs_io_completion_alloc(GFP_NOFS);

	ioc = nfs_io_completion_alloc(GFP_KERNEL);

	if (ioc)

		nfs_io_completion_init(ioc, nfs_io_completion_commit, inode);
@@ -737,8 +736,6 @@ int nfs_writepages(struct address_space *mapping, struct writeback_control *wbc) 
	nfs_pageio_complete(&pgio);

	nfs_io_completion_put(ioc);



	memalloc_nofs_restore(pflags);



	if (err < 0)

		goto out_err;

	err = pgio.pg_error;

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