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a375eb795c
Previous "breakage" of the swap on arm64 has been found to be an issue on one machine the rockpro/arm64 related to a deadlock built into the sdmmc(4) stack interacting with swapping code both running under KERNEL_LOCK(). This issue is easily reproducible on -current and entering swap when building LLVM on a rockpro crashes the machine by memory corruption. Tested by mlarkin@ on octeon & i386, by myself on amd64 & arm64 and by sthen@ on i386 port bulk. ok beck@ some time ago. Previous commit message: Simplify the aiodone daemon which is only used for async writes. - Remove unused support for asynchronous read, including error conditions - Grab the proper lock for each page that has been written to swap. This allows to enable an assertion in uvm_page_unbusy(). - Move the uvm_anon_release() call outside of uvm_page_unbusy() and assert for the different anon cases. ok beck@, kettenis@
78 lines
2.5 KiB
C
78 lines
2.5 KiB
C
/* $OpenBSD: uvm_aobj.h,v 1.20 2023/05/13 09:24:59 mpi Exp $ */
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/* $NetBSD: uvm_aobj.h,v 1.10 2000/01/11 06:57:49 chs Exp $ */
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/*
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* Copyright (c) 1998 Chuck Silvers, Charles D. Cranor and
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* Washington University.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* from: Id: uvm_aobj.h,v 1.1.2.4 1998/02/06 05:19:28 chs Exp
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*/
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/*
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* uvm_aobj.h: anonymous memory uvm_object pager
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*
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* author: Chuck Silvers <chuq@chuq.com>
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* started: Jan-1998
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*
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* - design mostly from Chuck Cranor
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*/
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#ifndef _UVM_UVM_AOBJ_H_
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#define _UVM_UVM_AOBJ_H_
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/*
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* flags
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*/
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/* flags for uao_create: can only be used one time (at bootup) */
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#define UAO_FLAG_KERNOBJ 0x1 /* create kernel object */
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#define UAO_FLAG_KERNSWAP 0x2 /* enable kernel swap */
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#define UAO_FLAG_CANFAIL 0x4 /* creation can fail */
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/* internal flags */
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#define UAO_FLAG_NOSWAP 0x8 /* aobj can't swap (kernel obj only!) */
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#ifdef _KERNEL
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/*
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* prototypes
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*/
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void uao_init(void);
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int uao_set_swslot(struct uvm_object *, int, int);
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int uao_find_swslot(struct uvm_object *, int);
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int uao_dropswap(struct uvm_object *, int);
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int uao_swap_off(int, int);
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int uao_shrink(struct uvm_object *, int);
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int uao_grow(struct uvm_object *, int);
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/*
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* globals
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*/
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extern const struct uvm_pagerops aobj_pager;
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#endif /* _KERNEL */
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#endif /* _UVM_UVM_AOBJ_H_ */
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