Differential D29077 Diff 85422 sys/compat/linuxkpi/common/src/linux_domain.c

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sys/compat/linuxkpi/common/src/linux_domain.c

This file was copied from sys/compat/linuxkpi/common/include/linux/compat.h.

	/*-			/*-
	* Copyright (c) 2010 Isilon Systems, Inc.			* Copyright (c) 2021 NVIDIA Networking
	* Copyright (c) 2010 iX Systems, Inc.
	* Copyright (c) 2010 Panasas, Inc.
	* Copyright (c) 2013-2017 Mellanox Technologies, Ltd.
	* All rights reserved.			* All rights reserved.
	*			*
	* Redistribution and use in source and binary forms, with or without			* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions			* modification, are permitted provided that the following conditions
	* are met:			* are met:
	* 1. Redistributions of source code must retain the above copyright			* 1. Redistributions of source code must retain the above copyright
	* notice unmodified, this list of conditions, and the following			* notice unmodified, this list of conditions, and the following
	* disclaimer.			* disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright			* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the			* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.			* documentation and/or other materials provided with the distribution.
	*			*
	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES			* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.			* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,			* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT			* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY			* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT			* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF			* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.			* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*
	* $FreeBSD$
	*/			*/
	#ifndef _LINUX_COMPAT_H_
	#define _LINUX_COMPAT_H_

				#include <sys/cdefs.h>
				__FBSDID("$FreeBSD$");

	#include <sys/param.h>			#include <sys/param.h>
	#include <sys/proc.h>			#include <sys/systm.h>
	#include <sys/malloc.h>			#include <sys/domainset.h>
				#include <sys/bus.h>

	struct thread;			#include <linux/compat.h>
	struct task_struct;			#include <linux/device.h>

	extern int linux_alloc_current(struct thread *, int flags);			struct domainset *
	extern void linux_free_current(struct task_struct *);			linux_get_vm_domain_set(int node)

	static inline void
	linux_set_current(struct thread *td)
	{			{
	if (__predict_false(td->td_lkpi_task == NULL))			KASSERT(node < MAXMEMDOM, ("Invalid VM domain %d", node));
	lkpi_alloc_current(td, M_WAITOK);
				if (node < 0)
				return (DOMAINSET_RR());
				else
				return (DOMAINSET_PREF(node));
				kibUnsubmitted Done Inline Actions Are you sure that FIXED policy is right there? What is the Linux' semantic? From my experience, it almost never is. You typically want a graceful fallback to to other domains if requested domain is full. AFAIR in our terminology this means _PREF(). kib: Are you sure that FIXED policy is right there? What is the Linux' semantic? From my…
	}			}

	static inline int			int
	linux_set_current_flags(struct thread *td, int flags)			linux_dev_to_node(struct device *dev)
	{			{
	if (__predict_false(td->td_lkpi_task == NULL))			int numa_domain;
	return (lkpi_alloc_current(td, flags));
	return (0);
	}

	#endif /* _LINUX_COMPAT_H_ */			if (dev == NULL \|\| dev->bsddev == NULL \|\|
				bus_get_domain(dev->bsddev, &numa_domain) != 0)
				return (-1);
				else
				return (numa_domain);
				}