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inline atomics and allow tied modules to inline locks

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- inline atomics in modules on i386 and amd64 (they were always
  inline on other arches)
- allow modules to opt in to inlining locks by specifying
  MODULE_TIED=1 in the makefile

Reviewed by: kib
Sponsored by: Limelight Networks
Differential Revision: https://reviews.freebsd.org/D16079
This commit is contained in:
Matt Macy 2018-07-02 19:48:38 +00:00
parent 0479387e0a
commit f4b3640475
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=335873
14 changed files with 20 additions and 114 deletions
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4
UPDATING
View file

@ -31,6 +31,10 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 12.x IS SLOW:
disable the most expensive debugging functionality run
"ln -s 'abort:false,junk:false' /etc/malloc.conf".)
20180702:
On i386 and amd64 atomics are now inlined. Out of tree modules using
atomics will need to be rebuilt.
20180701:
The '%I' format in the kern.corefile sysctl limits the number of
core files that a process can generate to the number stored in the

52
sys/amd64/amd64/atomic.c
View file

@ -1,52 +0,0 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 1999 Peter Jeremy
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/* This file creates publicly callable functions to perform various
* simple arithmetic on memory which is atomic in the presence of
* interrupts and multiple processors.
*/
#include <sys/types.h>
/* Firstly make atomic.h generate prototypes as it will for kernel modules */
#define KLD_MODULE
#include <machine/atomic.h>
#undef _MACHINE_ATOMIC_H_ /* forget we included it */
#undef KLD_MODULE
#undef ATOMIC_ASM
/* Make atomic.h generate public functions */
static __inline void __storeload_barrier(void);
#define WANT_FUNCTIONS
#define static
#undef __inline
#define __inline
#include <machine/atomic.h>

2
sys/amd64/include/atomic.h
View file

@ -96,7 +96,7 @@
* Kernel modules call real functions which are built into the kernel.
* This allows kernel modules to be portable between UP and SMP systems.
*/
#if defined(KLD_MODULE) || !defined(__GNUCLIKE_ASM)
#if !defined(__GNUCLIKE_ASM)
#define ATOMIC_ASM(NAME, TYPE, OP, CONS, V) \
void atomic_##NAME##_##TYPE(volatile u_##TYPE *p, u_##TYPE v); \
void atomic_##NAME##_barr_##TYPE(volatile u_##TYPE *p, u_##TYPE v)

1
sys/conf/files.amd64
View file

@ -126,7 +126,6 @@ acpi_wakedata.h optional acpi \
clean "acpi_wakedata.h"
#
#amd64/amd64/apic_vector.S standard
amd64/amd64/atomic.c standard
amd64/amd64/bios.c standard
amd64/amd64/bpf_jit_machdep.c optional bpf_jitter
amd64/amd64/cpu_switch.S standard

2
sys/conf/files.i386
View file

@ -474,8 +474,6 @@ i386/bios/smapi.c optional smapi
i386/bios/smapi_bios.S optional smapi
i386/cloudabi32/cloudabi32_sysvec.c optional compat_cloudabi32
#i386/i386/apic_vector.s optional apic
i386/i386/atomic.c standard \
compile-with "${CC} -c ${CFLAGS} ${DEFINED_PROF:S/^$/-fomit-frame-pointer/} ${.IMPSRC}"
i386/i386/bios.c standard
i386/i386/bioscall.s standard
i386/i386/bpf_jit_machdep.c optional bpf_jitter

3
sys/conf/kmod.mk
View file

@ -111,6 +111,9 @@ WERROR?= -Werror
CFLAGS+= ${WERROR}
CFLAGS+= -D_KERNEL
CFLAGS+= -DKLD_MODULE
.if defined(MODULE_TIED)
CFLAGS+= -DKLD_TIED
.endif
# Don't use any standard or source-relative include directories.
NOSTDINC= -nostdinc

51
sys/i386/i386/atomic.c
View file

@ -1,51 +0,0 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 1999 Peter Jeremy
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/* This file creates publically callable functions to perform various
* simple arithmetic on memory which is atomic in the presence of
* interrupts and multiple processors.
*/
#include <sys/types.h>
/* Firstly make atomic.h generate prototypes as it will for kernel modules */
#define KLD_MODULE
#include <machine/atomic.h>
#undef _MACHINE_ATOMIC_H_ /* forget we included it */
#undef KLD_MODULE
#undef ATOMIC_ASM
/* Make atomic.h generate public functions */
#define WANT_FUNCTIONS
#define static
#undef __inline
#define __inline
#include <machine/atomic.h>

2
sys/i386/include/atomic.h
View file

@ -104,7 +104,7 @@ __mbu(void)
* Kernel modules call real functions which are built into the kernel.
* This allows kernel modules to be portable between UP and SMP systems.
*/
#if defined(KLD_MODULE) || !defined(__GNUCLIKE_ASM)
#if !defined(__GNUCLIKE_ASM)
#define ATOMIC_ASM(NAME, TYPE, OP, CONS, V) \
void atomic_##NAME##_##TYPE(volatile u_##TYPE *p, u_##TYPE v); \
void atomic_##NAME##_barr_##TYPE(volatile u_##TYPE *p, u_##TYPE v)

2
sys/sys/lock.h
View file

@ -127,7 +127,7 @@ struct lock_class {
* calling conventions for this debugging code in modules so that modules can
* work with both debug and non-debug kernels.
*/
#if defined(KLD_MODULE) || defined(WITNESS) || defined(INVARIANTS) || \
#if (defined(KLD_MODULE) && !defined(KLD_TIED)) || defined(WITNESS) || defined(INVARIANTS) || \
defined(LOCK_PROFILING) || defined(KTR)
#define LOCK_DEBUG 1
#else

5
sys/sys/module.h
View file

@ -146,8 +146,13 @@ struct mod_pnp_match_info
SYSINIT(name##module, sub, order, module_register_init, &data); \
struct __hack
#ifdef KLD_TIED
#define DECLARE_MODULE(name, data, sub, order) \
DECLARE_MODULE_WITH_MAXVER(name, data, sub, order, __FreeBSD_version)
#else
#define DECLARE_MODULE(name, data, sub, order) \
DECLARE_MODULE_WITH_MAXVER(name, data, sub, order, MODULE_KERNEL_MAXVER)
#endif
/*
* The module declared with DECLARE_MODULE_TIED can only be loaded

2
sys/sys/mutex.h
View file

@ -138,7 +138,7 @@ void _thread_lock(struct thread *td, int opts, const char *file, int line);
void _thread_lock(struct thread *);
#endif
#if defined(LOCK_PROFILING) || defined(KLD_MODULE)
#if defined(LOCK_PROFILING) || (defined(KLD_MODULE) && !defined(KLD_TIED))
#define thread_lock(tdp) \
thread_lock_flags_((tdp), 0, __FILE__, __LINE__)
#elif LOCK_DEBUG > 0

2
sys/sys/param.h
View file

@ -60,7 +60,7 @@
* in the range 5 to 9.
*/
#undef __FreeBSD_version
#define __FreeBSD_version 1200069 /* Master, propagated to newvers */
#define __FreeBSD_version 1200070 /* Master, propagated to newvers */
/*
* __FreeBSD_kernel__ indicates that this system uses the kernel of FreeBSD,

2
sys/vm/vm_map.h
View file

@ -206,7 +206,7 @@ struct vm_map {
#define MAP_BUSY_WAKEUP 0x02
#ifdef _KERNEL
#ifdef KLD_MODULE
#if defined(KLD_MODULE) && !defined(KLD_TIED)
#define vm_map_max(map) vm_map_max_KBI((map))
#define vm_map_min(map) vm_map_min_KBI((map))
#define vm_map_pmap(map) vm_map_pmap_KBI((map))

4
sys/vm/vm_page.h
View file

@ -304,7 +304,7 @@ extern struct mtx_padalign pa_lock[];
#define PA_LOCK_ASSERT(pa, a) mtx_assert(PA_LOCKPTR(pa), (a))
#ifdef KLD_MODULE
#if defined(KLD_MODULE) && !defined(KLD_TIED)
#define vm_page_lock(m) vm_page_lock_KBI((m), LOCK_FILE, LOCK_LINE)
#define vm_page_unlock(m) vm_page_unlock_KBI((m), LOCK_FILE, LOCK_LINE)
#define vm_page_trylock(m) vm_page_trylock_KBI((m), LOCK_FILE, LOCK_LINE)
@ -734,7 +734,7 @@ vm_page_dirty(vm_page_t m)
{
/* Use vm_page_dirty_KBI() under INVARIANTS to save memory. */
#if defined(KLD_MODULE) || defined(INVARIANTS)
#if (defined(KLD_MODULE) && !defined(KLD_TIED)) || defined(INVARIANTS)
vm_page_dirty_KBI(m);
#else
m->dirty = VM_PAGE_BITS_ALL;