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2619c5ccfe
- Change vm_page_reclaim_contig[_domain] to return an errno instead of a boolean. 0 indicates a successful reclaim, ENOMEM indicates lack of available memory to reclaim, with any other error (currently only ERANGE) indicating that reclamation is impossible for the specified address range. Change all callers to only follow up with vm_page_wait* in the ENOMEM case. - Introduce vm_domainset_iter_ignore(), which marks the specified domain as unavailable for further use by the iterator. Use this function to ignore domains that can't possibly satisfy a physical allocation request. Since WAITOK allocations run the iterators repeatedly, this avoids the possibility of infinitely spinning in domain iteration if no available domain can satisfy the allocation request. PR: 274252 Reported by: kevans Tested by: kevans Reviewed by: markj Differential Revision: https://reviews.freebsd.org/D42706
56 lines
2.3 KiB
C
56 lines
2.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2017, Jeffrey Roberson <jeff@freebsd.org>
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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 unmodified, this list of conditions, and the following
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* 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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#ifndef __VM_DOMAINSET_H__
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#define __VM_DOMAINSET_H__
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struct vm_domainset_iter {
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struct domainset *di_domain;
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unsigned int *di_iter;
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domainset_t di_valid_mask;
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vm_pindex_t di_offset;
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int di_flags;
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uint16_t di_policy;
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domainid_t di_n;
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bool di_minskip;
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};
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int vm_domainset_iter_page(struct vm_domainset_iter *, struct vm_object *,
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int *);
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void vm_domainset_iter_page_init(struct vm_domainset_iter *,
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struct vm_object *, vm_pindex_t, int *, int *);
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int vm_domainset_iter_policy(struct vm_domainset_iter *, int *);
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void vm_domainset_iter_policy_init(struct vm_domainset_iter *,
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struct domainset *, int *, int *);
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void vm_domainset_iter_policy_ref_init(struct vm_domainset_iter *,
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struct domainset_ref *, int *, int *);
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void vm_domainset_iter_ignore(struct vm_domainset_iter *, int);
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int vm_wait_doms(const domainset_t *, int mflags);
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#endif /* __VM_DOMAINSET_H__ */
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