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c405a7a35c
Avoid calling dbuf_evict_one() from memory reclaim contexts (e.g. Linux kswapd, FreeBSD pagedaemon). This prevents deadlock caused by reclaim threads waiting for the dbuf hash lock in the call sequence: dbuf_evict_one -> dbuf_destroy -> arc_buf_destroy Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Alexander Motin <alexander.motin@TrueNAS.com> Signed-off-by: Kaitlin Hoang <kthoang@amazon.com> Closes #17561
65 lines
2.1 KiB
C
65 lines
2.1 KiB
C
// SPDX-License-Identifier: BSD-2-Clause
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/*
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* Copyright (c) 2007 Pawel Jakub Dawidek <pjd@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, 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 AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _OPENSOLARIS_SYS_MISC_H_
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#define _OPENSOLARIS_SYS_MISC_H_
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#include <sys/limits.h>
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#include <sys/filio.h>
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#define MAXUID UID_MAX
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#define _ACL_ACLENT_ENABLED 0x1
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#define _ACL_ACE_ENABLED 0x2
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#define _FIOFFS (INT_MIN)
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#define _FIOGDIO (INT_MIN+1)
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#define _FIOSDIO (INT_MIN+2)
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#define F_SEEK_DATA FIOSEEKDATA
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#define F_SEEK_HOLE FIOSEEKHOLE
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struct opensolaris_utsname {
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const char *sysname;
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const char *nodename;
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const char *release;
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char version[32];
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const char *machine;
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};
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#define task_io_account_read(n)
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#define task_io_account_write(n)
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/*
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* Check if the current thread is a memory reclaim thread.
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*/
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extern int current_is_reclaim_thread(void);
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#endif /* _OPENSOLARIS_SYS_MISC_H_ */
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