Release 4.10 fs/nfs/read.c

Directory: fs/nfs
/*
 * linux/fs/nfs/read.c
 *
 * Block I/O for NFS
 *
 * Partial copy of Linus' read cache modifications to fs/nfs/file.c
 * modified for async RPC by okir@monad.swb.de
 */

#include <linux/time.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/fcntl.h>
#include <linux/stat.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/pagemap.h>
#include <linux/sunrpc/clnt.h>
#include <linux/nfs_fs.h>
#include <linux/nfs_page.h>
#include <linux/module.h>

#include "nfs4_fs.h"
#include "internal.h"
#include "iostat.h"
#include "fscache.h"
#include "pnfs.h"


#define NFSDBG_FACILITY		NFSDBG_PAGECACHE


static const struct nfs_pgio_completion_ops nfs_async_read_completion_ops;

static const struct nfs_rw_ops nfs_rw_read_ops;


static struct kmem_cache *nfs_rdata_cachep;



static struct nfs_pgio_header *nfs_readhdr_alloc(void)
{
	return kmem_cache_zalloc(nfs_rdata_cachep, GFP_KERNEL);
}

Contributors
Person Tokens Prop Commits CommitProp
trond myklebust trond myklebust 12 66.67% 5 55.56%
fred isaman fred isaman 3 16.67% 2 22.22%
anna schumaker anna schumaker 2 11.11% 1 11.11%
weston andros adamson weston andros adamson 1 5.56% 1 11.11%
Total 18 100.00% 9 100.00%



static void nfs_readhdr_free(struct nfs_pgio_header *rhdr)
{
	kmem_cache_free(nfs_rdata_cachep, rhdr);
}

Contributors
Person Tokens Prop Commits CommitProp
trond myklebust trond myklebust 10 55.56% 2 40.00%
fred isaman fred isaman 4 22.22% 1 20.00%
anna schumaker anna schumaker 3 16.67% 1 20.00%
weston andros adamson weston andros adamson 1 5.56% 1 20.00%
Total 18 100.00% 5 100.00%


static

int nfs_return_empty_page(struct page *page)
{
	zero_user(page, 0, PAGE_SIZE);
	SetPageUptodate(page);
	unlock_page(page);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
trond myklebust trond myklebust 31 93.94% 1 33.33%
kirill a. shutemov kirill a. shutemov 1 3.03% 1 33.33%
christoph lameter christoph lameter 1 3.03% 1 33.33%
Total 33 100.00% 3 100.00%



void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
			      struct inode *inode, bool force_mds,
			      const struct nfs_pgio_completion_ops *compl_ops)
{
	struct nfs_server *server = NFS_SERVER(inode);
	const struct nfs_pageio_ops *pg_ops = &nfs_pgio_rw_ops;

#ifdef CONFIG_NFS_V4_1
	if (server->pnfs_curr_ld && !force_mds)
		pg_ops = server->pnfs_curr_ld->pg_read_ops;
#endif
	nfs_pageio_init(pgio, inode, pg_ops, compl_ops, &nfs_rw_read_ops,
			server->rsize, 0);
}
Contributors
Person Tokens Prop Commits CommitProp
christoph hellwig christoph hellwig 45 52.94% 1 14.29%
fred isaman fred isaman 28 32.94% 2 28.57%
trond myklebust trond myklebust 7 8.24% 1 14.29%
anna schumaker anna schumaker 4 4.71% 2 28.57%
bryan schumaker bryan schumaker 1 1.18% 1 14.29%
Total 85 100.00% 7 100.00%


EXPORT_SYMBOL_GPL(nfs_pageio_init_read);



void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio)
{
	struct nfs_pgio_mirror *mirror;

	if (pgio->pg_ops && pgio->pg_ops->pg_cleanup)
		pgio->pg_ops->pg_cleanup(pgio);

	pgio->pg_ops = &nfs_pgio_rw_ops;

	/* read path should never have more than one mirror */
	WARN_ON_ONCE(pgio->pg_mirror_count != 1);

	mirror = &pgio->pg_mirrors[0];
	mirror->pg_bsize = NFS_SERVER(pgio->pg_inode)->rsize;
}
Contributors
Person Tokens Prop Commits CommitProp
weston andros adamson weston andros adamson 25 32.89% 1 16.67%
kinglong mee kinglong mee 21 27.63% 1 16.67%
fred isaman fred isaman 15 19.74% 1 16.67%
trond myklebust trond myklebust 14 18.42% 2 33.33%
anna schumaker anna schumaker 1 1.32% 1 16.67%
Total 76 100.00% 6 100.00%


EXPORT_SYMBOL_GPL(nfs_pageio_reset_read_mds);



static void nfs_readpage_release(struct nfs_page *req)
{
	struct inode *inode = d_inode(req->wb_context->dentry);

	dprintk("NFS: read done (%s/%llu %d@%lld)\n", inode->i_sb->s_id,
		(unsigned long long)NFS_FILEID(inode), req->wb_bytes,
		(long long)req_offset(req));

	if (nfs_page_group_sync_on_bit(req, PG_UNLOCKPAGE)) {
		if (PageUptodate(req->wb_page))
			nfs_readpage_to_fscache(inode, req->wb_page, 0);

		unlock_page(req->wb_page);
	}
	nfs_release_request(req);
}

Contributors
Person Tokens Prop Commits CommitProp
peng tao peng tao 102 100.00% 1 100.00%
Total 102 100.00% 1 100.00%



int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode,
		       struct page *page)
{
	struct nfs_page	*new;
	unsigned int len;
	struct nfs_pageio_descriptor pgio;
	struct nfs_pgio_mirror *pgm;

	len = nfs_page_length(page);
	if (len == 0)
		return nfs_return_empty_page(page);
	new = nfs_create_request(ctx, page, NULL, 0, len);
	if (IS_ERR(new)) {
		unlock_page(page);
		return PTR_ERR(new);
	}
	if (len < PAGE_SIZE)
		zero_user_segment(page, len, PAGE_SIZE);

	nfs_pageio_init_read(&pgio, inode, false,
			     &nfs_async_read_completion_ops);
	if (!nfs_pageio_add_request(&pgio, new)) {
		nfs_list_remove_request(new);
		nfs_readpage_release(new);
	}
	nfs_pageio_complete(&pgio);

	/* It doesn't make sense to do mirrored reads! */
	WARN_ON_ONCE(pgio.pg_mirror_count != 1);

	pgm = &pgio.pg_mirrors[0];
	NFS_I(inode)->read_io += pgm->pg_bytes_written;

	return pgio.pg_error < 0 ? pgio.pg_error : 0;
}

Contributors
Person Tokens Prop Commits CommitProp
trond myklebust trond myklebust 54 27.98% 6 30.00%
pre-git pre-git 44 22.80% 2 10.00%
weston andros adamson weston andros adamson 29 15.03% 2 10.00%
peng tao peng tao 25 12.95% 2 10.00%
fred isaman fred isaman 16 8.29% 2 10.00%
linus torvalds linus torvalds 10 5.18% 2 10.00%
andy adamson andy adamson 9 4.66% 1 5.00%
christoph hellwig christoph hellwig 3 1.55% 1 5.00%
kirill a. shutemov kirill a. shutemov 2 1.04% 1 5.00%
christoph lameter christoph lameter 1 0.52% 1 5.00%
Total 193 100.00% 20 100.00%



static void nfs_page_group_set_uptodate(struct nfs_page *req)
{
	if (nfs_page_group_sync_on_bit(req, PG_UPTODATE))
		SetPageUptodate(req->wb_page);
}

Contributors
Person Tokens Prop Commits CommitProp
weston andros adamson weston andros adamson 27 100.00% 1 100.00%
Total 27 100.00% 1 100.00%



static void nfs_read_completion(struct nfs_pgio_header *hdr)
{
	unsigned long bytes = 0;

	if (test_bit(NFS_IOHDR_REDO, &hdr->flags))
		goto out;
	while (!list_empty(&hdr->pages)) {
		struct nfs_page *req = nfs_list_entry(hdr->pages.next);
		struct page *page = req->wb_page;
		unsigned long start = req->wb_pgbase;
		unsigned long end = req->wb_pgbase + req->wb_bytes;

		if (test_bit(NFS_IOHDR_EOF, &hdr->flags)) {
			/* note: regions of the page not covered by a
                         * request are zeroed in nfs_readpage_async /
                         * readpage_async_filler */
			if (bytes > hdr->good_bytes) {
				/* nothing in this request was good, so zero
                                 * the full extent of the request */
				zero_user_segment(page, start, end);

			} else if (hdr->good_bytes - bytes < req->wb_bytes) {
				/* part of this request has good bytes, but
                                 * not all. zero the bad bytes */
				start += hdr->good_bytes - bytes;
				WARN_ON(start < req->wb_pgbase);
				zero_user_segment(page, start, end);
			}
		}
		bytes += req->wb_bytes;
		if (test_bit(NFS_IOHDR_ERROR, &hdr->flags)) {
			if (bytes <= hdr->good_bytes)
				nfs_page_group_set_uptodate(req);
		} else
			nfs_page_group_set_uptodate(req);
		nfs_list_remove_request(req);
		nfs_readpage_release(req);
	}
out:
	hdr->release(hdr);
}

Contributors
Person Tokens Prop Commits CommitProp
fred isaman fred isaman 138 61.88% 2 20.00%
weston andros adamson weston andros adamson 56 25.11% 2 20.00%
trond myklebust trond myklebust 29 13.00% 6 60.00%
Total 223 100.00% 10 100.00%



static void nfs_initiate_read(struct nfs_pgio_header *hdr,
			      struct rpc_message *msg,
			      const struct nfs_rpc_ops *rpc_ops,
			      struct rpc_task_setup *task_setup_data, int how)
{
	struct inode *inode = hdr->inode;
	int swap_flags = IS_SWAPFILE(inode) ? NFS_RPC_SWAPFLAGS : 0;

	task_setup_data->flags |= swap_flags;
	rpc_ops->read_setup(hdr, msg);
}

Contributors
Person Tokens Prop Commits CommitProp
fred isaman fred isaman 32 48.48% 1 11.11%
andy adamson andy adamson 10 15.15% 2 22.22%
anna schumaker anna schumaker 9 13.64% 1 11.11%
tom haynes tom haynes 7 10.61% 1 11.11%
weston andros adamson weston andros adamson 4 6.06% 1 11.11%
trond myklebust trond myklebust 4 6.06% 3 33.33%
Total 66 100.00% 9 100.00%


static void

nfs_async_read_error(struct list_head *head)
{
	struct nfs_page	*req;

	while (!list_empty(head)) {
		req = nfs_list_entry(head->next);
		nfs_list_remove_request(req);
		nfs_readpage_release(req);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 39 86.67% 1 25.00%
trond myklebust trond myklebust 5 11.11% 2 50.00%
fred isaman fred isaman 1 2.22% 1 25.00%
Total 45 100.00% 4 100.00%


static const struct nfs_pgio_completion_ops nfs_async_read_completion_ops = {
	.error_cleanup = nfs_async_read_error,
	.completion = nfs_read_completion,
};

/*
 * This is the callback from RPC telling us whether a reply was
 * received or some error occurred (timeout or socket shutdown).
 */


static int nfs_readpage_done(struct rpc_task *task,
			     struct nfs_pgio_header *hdr,
			     struct inode *inode)
{
	int status = NFS_PROTO(inode)->read_done(task, hdr);
	if (status != 0)
		return status;

	nfs_add_stats(inode, NFSIOS_SERVERREADBYTES, hdr->res.count);

	if (task->tk_status == -ESTALE) {
		set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
		nfs_mark_for_revalidate(inode);
	}
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
trond myklebust trond myklebust 72 80.00% 1 20.00%
anna schumaker anna schumaker 7 7.78% 1 20.00%
fred isaman fred isaman 4 4.44% 1 20.00%
weston andros adamson weston andros adamson 4 4.44% 1 20.00%
benny halevy benny halevy 3 3.33% 1 20.00%
Total 90 100.00% 5 100.00%



static void nfs_readpage_retry(struct rpc_task *task,
			       struct nfs_pgio_header *hdr)
{
	struct nfs_pgio_args *argp = &hdr->args;
	struct nfs_pgio_res  *resp = &hdr->res;

	/* This is a short read! */
	nfs_inc_stats(hdr->inode, NFSIOS_SHORTREAD);
	/* Has the server at least made some progress? */
	if (resp->count == 0) {
		nfs_set_pgio_error(hdr, -EIO, argp->offset);
		return;
	}

	/* For non rpc-based layout drivers, retry-through-MDS */
	if (!task->tk_ops) {
		hdr->pnfs_error = -EAGAIN;
		return;
	}

	/* Yes, so retry the read at the end of the hdr */
	hdr->mds_offset += resp->count;
	argp->offset += resp->count;
	argp->pgbase += resp->count;
	argp->count -= resp->count;
	rpc_restart_call_prepare(task);
}

Contributors
Person Tokens Prop Commits CommitProp
trond myklebust trond myklebust 75 59.52% 4 33.33%
kinglong mee kinglong mee 18 14.29% 1 8.33%
fred isaman fred isaman 14 11.11% 2 16.67%
andy adamson andy adamson 9 7.14% 2 16.67%
weston andros adamson weston andros adamson 8 6.35% 1 8.33%
anna schumaker anna schumaker 2 1.59% 2 16.67%
Total 126 100.00% 12 100.00%



static void nfs_readpage_result(struct rpc_task *task,
				struct nfs_pgio_header *hdr)
{
	if (hdr->res.eof) {
		loff_t bound;

		bound = hdr->args.offset + hdr->res.count;
		spin_lock(&hdr->lock);
		if (bound < hdr->io_start + hdr->good_bytes) {
			set_bit(NFS_IOHDR_EOF, &hdr->flags);
			clear_bit(NFS_IOHDR_ERROR, &hdr->flags);
			hdr->good_bytes = bound - hdr->io_start;
		}
		spin_unlock(&hdr->lock);
	} else if (hdr->res.count < hdr->args.count)
		nfs_readpage_retry(task, hdr);
}

Contributors
Person Tokens Prop Commits CommitProp
fred isaman fred isaman 57 45.60% 1 6.25%
trond myklebust trond myklebust 50 40.00% 8 50.00%
weston andros adamson weston andros adamson 8 6.40% 1 6.25%
pre-git pre-git 3 2.40% 1 6.25%
andy adamson andy adamson 3 2.40% 1 6.25%
linus torvalds linus torvalds 1 0.80% 1 6.25%
anna schumaker anna schumaker 1 0.80% 1 6.25%
kinglong mee kinglong mee 1 0.80% 1 6.25%
bryan schumaker bryan schumaker 1 0.80% 1 6.25%
Total 125 100.00% 16 100.00%

/*
 * Read a page over NFS.
 * We read the page synchronously in the following case:
 *  -   The error flag is set for this page. This happens only when a
 *      previous async read operation failed.
 */


int nfs_readpage(struct file *file, struct page *page)
{
	struct nfs_open_context *ctx;
	struct inode *inode = page_file_mapping(page)->host;
	int		error;

	dprintk("NFS: nfs_readpage (%p %ld@%lu)\n",
		page, PAGE_SIZE, page_index(page));
	nfs_inc_stats(inode, NFSIOS_VFSREADPAGE);
	nfs_add_stats(inode, NFSIOS_READPAGES, 1);

	/*
         * Try to flush any pending writes to the file..
         *
         * NOTE! Because we own the page lock, there cannot
         * be any new pending writes generated at this point
         * for this page (other pages can be written to).
         */
	error = nfs_wb_page(inode, page);
	if (error)
		goto out_unlock;
	if (PageUptodate(page))
		goto out_unlock;

	error = -ESTALE;
	if (NFS_STALE(inode))
		goto out_unlock;

	if (file == NULL) {
		error = -EBADF;
		ctx = nfs_find_open_context(inode, NULL, FMODE_READ);
		if (ctx == NULL)
			goto out_unlock;
	} else
		ctx = get_nfs_open_context(nfs_file_open_context(file));

	if (!IS_SYNC(inode)) {
		error = nfs_readpage_from_fscache(ctx, inode, page);
		if (error == 0)
			goto out;
	}

	error = nfs_readpage_async(ctx, inode, page);

out:
	put_nfs_open_context(ctx);
	return error;
out_unlock:
	unlock_page(page);
	return error;
}

Contributors
Person Tokens Prop Commits CommitProp
trond myklebust trond myklebust 127 59.91% 9 52.94%
david howells david howells 32 15.09% 1 5.88%
pre-git pre-git 24 11.32% 1 5.88%
chuck lever chuck lever 13 6.13% 1 5.88%
linus torvalds linus torvalds 6 2.83% 1 5.88%
mel gorman mel gorman 5 2.36% 1 5.88%
nicolas iooss nicolas iooss 3 1.42% 1 5.88%
huang ying huang ying 1 0.47% 1 5.88%
kirill a. shutemov kirill a. shutemov 1 0.47% 1 5.88%
Total 212 100.00% 17 100.00%


struct nfs_readdesc {
	
struct nfs_pageio_descriptor *pgio;
	
struct nfs_open_context *ctx;
};


static int

readpage_async_filler(void *data, struct page *page)
{
	struct nfs_readdesc *desc = (struct nfs_readdesc *)data;
	struct nfs_page *new;
	unsigned int len;
	int error;

	len = nfs_page_length(page);
	if (len == 0)
		return nfs_return_empty_page(page);

	new = nfs_create_request(desc->ctx, page, NULL, 0, len);
	if (IS_ERR(new))
		goto out_error;

	if (len < PAGE_SIZE)
		zero_user_segment(page, len, PAGE_SIZE);
	if (!nfs_pageio_add_request(desc->pgio, new)) {
		nfs_list_remove_request(new);
		nfs_readpage_release(new);
		error = desc->pgio->pg_error;
		goto out;
	}
	return 0;
out_error:
	error = PTR_ERR(new);
	unlock_page(page);
out:
	return error;
}

Contributors
Person Tokens Prop Commits CommitProp
trond myklebust trond myklebust 116 73.89% 6 37.50%
fred isaman fred isaman 15 9.55% 1 6.25%
pre-git pre-git 11 7.01% 5 31.25%
peng tao peng tao 10 6.37% 1 6.25%
weston andros adamson weston andros adamson 2 1.27% 1 6.25%
kirill a. shutemov kirill a. shutemov 2 1.27% 1 6.25%
christoph lameter christoph lameter 1 0.64% 1 6.25%
Total 157 100.00% 16 100.00%



int nfs_readpages(struct file *filp, struct address_space *mapping,
		struct list_head *pages, unsigned nr_pages)
{
	struct nfs_pageio_descriptor pgio;
	struct nfs_pgio_mirror *pgm;
	struct nfs_readdesc desc = {
		.pgio = &pgio,
        };
	struct inode *inode = mapping->host;
	unsigned long npages;
	int ret = -ESTALE;

	dprintk("NFS: nfs_readpages (%s/%Lu %d)\n",
			inode->i_sb->s_id,
			(unsigned long long)NFS_FILEID(inode),
			nr_pages);
	nfs_inc_stats(inode, NFSIOS_VFSREADPAGES);

	if (NFS_STALE(inode))
		goto out;

	if (filp == NULL) {
		desc.ctx = nfs_find_open_context(inode, NULL, FMODE_READ);
		if (desc.ctx == NULL)
			return -EBADF;
	} else
		desc.ctx = get_nfs_open_context(nfs_file_open_context(filp));

	/* attempt to read as many of the pages as possible from the cache
         * - this returns -ENOBUFS immediately if the cookie is negative
         */
	ret = nfs_readpages_from_fscache(desc.ctx, inode, mapping,
					 pages, &nr_pages);
	if (ret == 0)
		goto read_complete; /* all pages were read */

	nfs_pageio_init_read(&pgio, inode, false,
			     &nfs_async_read_completion_ops);

	ret = read_cache_pages(mapping, pages, readpage_async_filler, &desc);
	nfs_pageio_complete(&pgio);

	/* It doesn't make sense to do mirrored reads! */
	WARN_ON_ONCE(pgio.pg_mirror_count != 1);

	pgm = &pgio.pg_mirrors[0];
	NFS_I(inode)->read_io += pgm->pg_bytes_written;
	npages = (pgm->pg_bytes_written + PAGE_SIZE - 1) >>
		 PAGE_SHIFT;
	nfs_add_stats(inode, NFSIOS_READPAGES, npages);
read_complete:
	put_nfs_open_context(desc.ctx);
out:
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
trond myklebust trond myklebust 159 56.99% 8 33.33%
david howells david howells 31 11.11% 1 4.17%
weston andros adamson weston andros adamson 29 10.39% 1 4.17%
pre-git pre-git 26 9.32% 8 33.33%
chuck lever chuck lever 15 5.38% 1 4.17%
andy adamson andy adamson 9 3.23% 1 4.17%
christoph hellwig christoph hellwig 3 1.08% 1 4.17%
fred isaman fred isaman 3 1.08% 1 4.17%
kirill a. shutemov kirill a. shutemov 2 0.72% 1 4.17%
niels de vos niels de vos 2 0.72% 1 4.17%
Total 279 100.00% 24 100.00%



int __init nfs_init_readpagecache(void)
{
	nfs_rdata_cachep = kmem_cache_create("nfs_read_data",
					     sizeof(struct nfs_pgio_header),
					     0, SLAB_HWCACHE_ALIGN,
					     NULL);
	if (nfs_rdata_cachep == NULL)
		return -ENOMEM;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 38 95.00% 3 60.00%
weston andros adamson weston andros adamson 1 2.50% 1 20.00%
david howells david howells 1 2.50% 1 20.00%
Total 40 100.00% 5 100.00%



void nfs_destroy_readpagecache(void)
{
	kmem_cache_destroy(nfs_rdata_cachep);
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 12 100.00% 2 100.00%
Total 12 100.00% 2 100.00%


static const struct nfs_rw_ops nfs_rw_read_ops = {
	.rw_mode		= FMODE_READ,
	.rw_alloc_header	= nfs_readhdr_alloc,
	.rw_free_header		= nfs_readhdr_free,
	.rw_done		= nfs_readpage_done,
	.rw_result		= nfs_readpage_result,
	.rw_initiate		= nfs_initiate_read,
};
Overall Contributors
Person Tokens Prop Commits CommitProp
trond myklebust trond myklebust 790 37.91% 38 38.78%
fred isaman fred isaman 358 17.18% 6 6.12%
pre-git pre-git 238 11.42% 10 10.20%
weston andros adamson weston andros adamson 195 9.36% 6 6.12%
peng tao peng tao 137 6.57% 2 2.04%
anna schumaker anna schumaker 73 3.50% 7 7.14%
david howells david howells 66 3.17% 2 2.04%
christoph hellwig christoph hellwig 54 2.59% 1 1.02%
andy adamson andy adamson 43 2.06% 5 5.10%
kinglong mee kinglong mee 40 1.92% 2 2.04%
chuck lever chuck lever 28 1.34% 1 1.02%
linus torvalds linus torvalds 18 0.86% 4 4.08%
kirill a. shutemov kirill a. shutemov 8 0.38% 1 1.02%
bryan schumaker bryan schumaker 7 0.34% 3 3.06%
tom haynes tom haynes 7 0.34% 1 1.02%
benny halevy benny halevy 5 0.24% 2 2.04%
christoph lameter christoph lameter 5 0.24% 2 2.04%
mel gorman mel gorman 5 0.24% 1 1.02%
nicolas iooss nicolas iooss 3 0.14% 1 1.02%
niels de vos niels de vos 2 0.10% 1 1.02%
dave jones dave jones 1 0.05% 1 1.02%
huang ying huang ying 1 0.05% 1 1.02%
Total 2084 100.00% 98 100.00%
Directory: fs/nfs

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
trond myklebust	trond myklebust	12	66.67%	5	55.56%
fred isaman	fred isaman	3	16.67%	2	22.22%
anna schumaker	anna schumaker	2	11.11%	1	11.11%
weston andros adamson	weston andros adamson	1	5.56%	1	11.11%
	Total	18	100.00%	9	100.00%
cregit-Linux how code gets into the kernel

Release 4.10 fs/nfs/read.c

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