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18b82048e4
This patch adds a new implementation of locking function instead of mlockall() that may lock way too much memory (>100MB). New function instead uses mlock() system call and selectively locks memory areas from /proc/self/maps trying to avoid locking areas unused during lock-ed state. Patch also adds struct cmd_context to all memlock() calls to have access to configuration. For backward compatibility functionality of mlockall() is preserved with "activation/use_mlockall" flag. As a simple check, locking and unlocking counts the amount of memory and compares whether values are matching.
29 lines
912 B
C
29 lines
912 B
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef LVM_MEMLOCK_H
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#define LVM_MEMLOCK_H
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struct cmd_context;
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void memlock_inc(struct cmd_context *cmd);
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void memlock_dec(struct cmd_context *cmd);
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void memlock_inc_daemon(struct cmd_context *cmd);
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void memlock_dec_daemon(struct cmd_context *cmd);
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int memlock(void);
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void memlock_init(struct cmd_context *cmd);
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#endif
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