litmus-rt.git - The LITMUS^RT kernel.

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author	Eric W. Biederman <ebiederm@xmission.com>	2007-02-14 03:34:06 -0500
committer	Linus Torvalds <torvalds@woody.linux-foundation.org>	2007-02-14 11:09:59 -0500
commit	a5494dcd8b92dce64317f2f7dd0d62747c54980b (patch)
tree	bdf0a29aecd3c043bc0478e6fa2e8a2b950f1b96 /include/asm-h8300/linkage.h
parent	39732acd968a007036ff3c504f1e6748024ef548 (diff)

[PATCH] sysctl: move SYSV IPC sysctls to their own file

This is just a simple cleanup to keep kernel/sysctl.c from getting to crowded with special cases, and by keeping all of the ipc logic to together it makes the code a little more readable. [gcoady.lk@gmail.com: build fix] Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Serge E. Hallyn <serue@us.ibm.com> Cc: Herbert Poetzl <herbert@13thfloor.at> Cc: Kirill Korotaev <dev@sw.ru> Signed-off-by: Grant Coady <gcoady.lk@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Diffstat (limited to 'include/asm-h8300/linkage.h')

0 files changed, 0 insertions, 0 deletions

/* * VMware Balloon driver. * * Copyright (C) 2000-2010, VMware, Inc. All Rights Reserved. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; version 2 of the License and no later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or * NON INFRINGEMENT. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Maintained by: Dmitry Torokhov <dtor@vmware.com> */ /* * This is VMware physical memory management driver for Linux. The driver * acts like a "balloon" that can be inflated to reclaim physical pages by * reserving them in the guest and invalidating them in the monitor, * freeing up the underlying machine pages so they can be allocated to * other guests. The balloon can also be deflated to allow the guest to * use more physical memory. Higher level policies can control the sizes * of balloons in VMs in order to manage physical memory resources. */ //#define DEBUG #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/types.h> #include <linux/kernel.h> #include <linux/mm.h> #include <linux/sched.h> #include <linux/module.h> #include <linux/workqueue.h> #include <linux/debugfs.h> #include <linux/seq_file.h> #include <asm/hypervisor.h> MODULE_AUTHOR("VMware, Inc."); MODULE_DESCRIPTION("VMware Memory Control (Balloon) Driver"); MODULE_VERSION("1.2.1.2-k"); MODULE_ALIAS("dmi:*:svnVMware*:*"); MODULE_ALIAS("vmware_vmmemctl"); MODULE_LICENSE("GPL"); /* * Various constants controlling rate of inflaint/deflating balloon, * measured in pages. */ /* * Rate of allocating memory when there is no memory pressure * (driver performs non-sleeping allocations). */ #define VMW_BALLOON_NOSLEEP_ALLOC_MAX 16384U /* * Rates of memory allocaton when guest experiences memory pressure * (driver performs sleeping allocations). */ #define VMW_BALLOON_RATE_ALLOC_MIN 512U #define VMW_BALLOON_RATE_ALLOC_MAX 2048U #define VMW_BALLOON_RATE_ALLOC_INC 16U /* * Rates for releasing pages while deflating balloon. */ #define VMW_BALLOON_RATE_FREE_MIN 512U #define VMW_BALLOON_RATE_FREE_MAX 16384U #define VMW_BALLOON_RATE_FREE_INC 16U /* * When guest is under memory pressure, use a reduced page allocation * rate for next several cycles. */ #define VMW_BALLOON_SLOW_CYCLES 4 /* * Use __GFP_HIGHMEM to allow pages from HIGHMEM zone. We don't * allow wait (__GFP_WAIT) for NOSLEEP page allocations. Use * __GFP_NOWARN, to suppress page allocation failure warnings. */ #define VMW_PAGE_ALLOC_NOSLEEP (__GFP_HIGHMEM|__GFP_NOWARN) /* * Use GFP_HIGHUSER when executing in a separate kernel thread * context and allocation can sleep. This is less stressful to * the guest memory system, since it allows the thread to block * while memory is reclaimed, and won't take pages from emergency * low-memory pools. */ #define VMW_PAGE_ALLOC_CANSLEEP (GFP_HIGHUSER) /* Maximum number of page allocations without yielding processor */ #define VMW_BALLOON_YIELD_THRESHOLD 1024 /* Maximum number of refused pages we accumulate during inflation cycle */ #define VMW_BALLOON_MAX_REFUSED 16 /* * Hypervisor communication port definitions. */ #define VMW_BALLOON_HV_PORT 0x5670 #define VMW_BALLOON_HV_MAGIC 0x456c6d6f #define VMW_BALLOON_PROTOCOL_VERSION 2 #define VMW_BALLOON_GUEST_ID 1 /* Linux */ #define VMW_BALLOON_CMD_START 0 #define VMW_BALLOON_CMD_GET_TARGET 1 #define VMW_BALLOON_CMD_LOCK 2 #define VMW_BALLOON_CMD_UNLOCK 3 #define VMW_BALLOON_CMD_GUEST_ID 4 /* error codes */ #define VMW_BALLOON_SUCCESS 0 #define VMW_BALLOON_FAILURE -1 #define VMW_BALLOON_ERROR_CMD_INVALID 1 #define VMW_BALLOON_ERROR_PPN_INVALID 2 #define VMW_BALLOON_ERROR_PPN_LOCKED 3 #define VMW_BALLOON_ERROR_PPN_UNLOCKED 4 #define VMW_BALLOON_ERROR_PPN_PINNED 5 #define VMW_BALLOON_ERROR_PPN_NOTNEEDED 6 #define VMW_BALLOON_ERROR_RESET 7 #define VMW_BALLOON_ERROR_BUSY 8 #define VMWARE_BALLOON_CMD(cmd, data, result) \ ({ \ unsigned long __stat, __dummy1, __dummy2; \ __asm__ __volatile__ ("inl (%%dx)" : \ "=a"(__stat), \ "=c"(__dummy1), \ "=d"(__dummy2), \ "=b"(result) : \ "0"(VMW_BALLOON_HV_MAGIC), \ "1"(VMW_BALLOON_CMD_##cmd), \ "2"(VMW_BALLOON_HV_PORT), \ "3"(data) : \ "memory"); \ result &= -1UL; \ __stat & -1UL; \ }) #ifdef CONFIG_DEBUG_FS struct vmballoon_stats { unsigned int timer; /* allocation statustics */ unsigned int alloc; unsigned int alloc_fail; unsigned int sleep_alloc; unsigned int sleep_alloc_fail; unsigned int refused_alloc; unsigned int refused_free; unsigned int free; /* monitor operations */ unsigned int lock; unsigned int lock_fail; unsigned int unlock; unsigned int unlock_fail; unsigned int target; unsigned int target_fail; unsigned int start; unsigned int start_fail; unsigned int guest_type; unsigned int guest_type_fail; }; #define STATS_INC(stat) (stat)++ #else #define STATS_INC(stat) #endif struct vmballoon { /* list of reserved physical pages */ struct list_head pages; /* transient list of non-balloonable pages */ struct list_head refused_pages; unsigned int n_refused_pages; /* balloon size in pages */ unsigned int size; unsigned int target; /* reset flag */ bool reset_required; /* adjustment rates (pages per second) */ unsigned int rate_alloc; unsigned int rate_free; /* slowdown page allocations for next few cycles */ unsigned int slow_allocation_cycles; #ifdef CONFIG_DEBUG_FS /* statistics */ struct vmballoon_stats stats; /* debugfs file exporting statistics */ struct dentry *dbg_entry; #endif struct sysinfo sysinfo; struct delayed_work dwork; }; static struct vmballoon balloon; static struct workqueue_struct *vmballoon_wq; /* * Send "start" command to the host, communicating supported version


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