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Olaf Hering
9245411c95
This change is based on an idea by <hongkaixing@huawei.com> and <bicky.shi@huawei.com>. Scanning the victims[] array is time consuming with a large number of target pages. Replace the loop to find the slot in the pagefile which holds the requested gfn with an index. Remove the victims array and replace it with a flat array. This array holds the gfn for a given slot in the pagefile. Adjust all users of the victims array. Rename variable in main() from i to slot to clearify the meaning. Update xenpaging_evict_page() to pass a pointer to xen_pfn_t to xc_map_foreign_pages(). Update policy_choose_victim() to return either a gfn or INVALID_MFN. Signed-off-by: Olaf Hering <olaf@aepfle.de> Committed-by: Ian Jackson <ian.jackson.citrix.com>
50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/******************************************************************************
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* tools/xenpaging/policy.h
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*
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* Xen domain paging policy hooks.
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*
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* Copyright (c) 2009 Citrix Systems, Inc. (Patrick Colp)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __XEN_PAGING_POLICY_H__
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#define __XEN_PAGING_POLICY_H__
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#include "xenpaging.h"
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int policy_init(struct xenpaging *paging);
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unsigned long policy_choose_victim(struct xenpaging *paging);
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void policy_notify_paged_out(unsigned long gfn);
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void policy_notify_paged_in(unsigned long gfn);
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void policy_notify_paged_in_nomru(unsigned long gfn);
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void policy_notify_dropped(unsigned long gfn);
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#endif // __XEN_PAGING_POLICY_H__
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/*
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* Local variables:
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* mode: C
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* c-set-style: "BSD"
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* c-basic-offset: 4
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* tab-width: 4
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* indent-tabs-mode: nil
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* End:
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*/
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