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Revision 64165b1affc5bc16231ac971e66aae7d68d57f2c authored by Hugh Dickins on 19 April 2019, 00:50:09 UTC, committed by Linus Torvalds on 19 April 2019, 16:46:04 UTC 
mm: swapoff: take notice of completion sooner
 
The old try_to_unuse() implementation was driven by find_next_to_unuse(),
which terminated as soon as all the swap had been freed.

Add inuse_pages checks now (alongside signal_pending()) to stop scanning
mms and swap_map once finished.

The same ought to be done in shmem_unuse() too, but never was before,
and needs a different interface: so leave it as is for now.

Link: http://lkml.kernel.org/r/alpine.LSU.2.11.1904081258200.1523@eggly.anvils
Fixes: b56a2d8af914 ("mm: rid swapoff of quadratic complexity")
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: "Alex Xu (Hello71)" <alex_y_xu@yahoo.ca>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Kelley Nielsen <kelleynnn@gmail.com>
Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: Rik van Riel <riel@surriel.com>
Cc: Vineeth Pillai <vpillai@digitalocean.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Raw File
nfs.h 
/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (c) 2012 Netapp, Inc. All rights reserved.
 *
 * Function and structures exported by the NFS module
 * for use by NFS version-specific modules.
 */
#ifndef __LINUX_INTERNAL_NFS_H
#define __LINUX_INTERNAL_NFS_H

#include <linux/fs.h>
#include <linux/sunrpc/sched.h>
#include <linux/nfs_xdr.h>

struct nfs_subversion {
	struct module *owner;	/* THIS_MODULE pointer */
	struct file_system_type *nfs_fs;	/* NFS filesystem type */
	const struct rpc_version *rpc_vers;	/* NFS version information */
	const struct nfs_rpc_ops *rpc_ops;	/* NFS operations */
	const struct super_operations *sops;	/* NFS Super operations */
	const struct xattr_handler **xattr;	/* NFS xattr handlers */
	struct list_head list;		/* List of NFS versions */
};

struct nfs_subversion *get_nfs_version(unsigned int);
void put_nfs_version(struct nfs_subversion *);
void register_nfs_version(struct nfs_subversion *);
void unregister_nfs_version(struct nfs_subversion *);

#endif /* __LINUX_INTERNAL_NFS_H */
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