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linux_acpi.c
(6.4 KB)
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linux_compat.c
(56.15 KB)
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linux_current.c
(5.98 KB)
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linux_devres.c
(5.61 KB)
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linux_dmi.c
(4.38 KB)
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linux_firmware.c
(5.51 KB)
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linux_fpu.c
(1.91 KB)
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linux_hrtimer.c
(3.25 KB)
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linux_idr.c
(16.5 KB)
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linux_kmod.c
(1.57 KB)
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linux_kthread.c
(4.21 KB)
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linux_lock.c
(4.35 KB)
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linux_page.c
(6.88 KB)
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linux_pci.c
(25.59 KB)
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linux_radix.c
(9.18 KB)
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linux_rcu.c
(9.98 KB)
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linux_schedule.c
(9.04 KB)
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linux_seq_file.c
(3.62 KB)
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linux_shmemfs.c
(3.65 KB)
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linux_shrinker.c
(3.37 KB)
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linux_slab.c
(4.22 KB)
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linux_tasklet.c
(6.12 KB)
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linux_usb.c
(46.71 KB)
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linux_work.c
(19.58 KB)
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linux_xarray.c
(8.6 KB)
Editing: linux_shrinker.c
/*- * Copyright (c) 2020 Emmanuel Vadot <manu@FreeBSD.org> * * 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. * * $FreeBSD$ */ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> #include <sys/queue.h> #include <sys/eventhandler.h> #include <sys/mutex.h> #include <linux/shrinker.h> TAILQ_HEAD(, shrinker) lkpi_shrinkers = TAILQ_HEAD_INITIALIZER(lkpi_shrinkers); static struct mtx mtx_shrinker; int linuxkpi_register_shrinker(struct shrinker *s) { KASSERT(s != NULL, ("NULL shrinker")); KASSERT(s->count_objects != NULL, ("NULL shrinker")); KASSERT(s->scan_objects != NULL, ("NULL shrinker")); mtx_lock(&mtx_shrinker); TAILQ_INSERT_TAIL(&lkpi_shrinkers, s, next); mtx_unlock(&mtx_shrinker); return (0); } void linuxkpi_unregister_shrinker(struct shrinker *s) { mtx_lock(&mtx_shrinker); TAILQ_REMOVE(&lkpi_shrinkers, s, next); mtx_unlock(&mtx_shrinker); } #define SHRINKER_BATCH 512 static void shrinker_shrink(struct shrinker *s) { struct shrink_control sc; unsigned long can_free; unsigned long batch; unsigned long scanned = 0; unsigned long ret; can_free = s->count_objects(s, &sc); if (can_free <= 0) return; batch = s->batch ? s->batch : SHRINKER_BATCH; while (scanned <= can_free) { sc.nr_to_scan = batch; ret = s->scan_objects(s, &sc); if (ret == SHRINK_STOP) break; scanned += batch; } } static void linuxkpi_vm_lowmem(void *arg __unused) { struct shrinker *s; mtx_lock(&mtx_shrinker); TAILQ_FOREACH(s, &lkpi_shrinkers, next) { shrinker_shrink(s); } mtx_unlock(&mtx_shrinker); } static eventhandler_tag lowmem_tag; static void linuxkpi_sysinit_shrinker(void *arg __unused) { mtx_init(&mtx_shrinker, "lkpi-shrinker", NULL, MTX_DEF); lowmem_tag = EVENTHANDLER_REGISTER(vm_lowmem, linuxkpi_vm_lowmem, NULL, EVENTHANDLER_PRI_FIRST); } static void linuxkpi_sysuninit_shrinker(void *arg __unused) { mtx_destroy(&mtx_shrinker); EVENTHANDLER_DEREGISTER(vm_lowmem, lowmem_tag); } SYSINIT(linuxkpi_shrinker, SI_SUB_DRIVERS, SI_ORDER_ANY, linuxkpi_sysinit_shrinker, NULL); SYSUNINIT(linuxkpi_shrinker, SI_SUB_DRIVERS, SI_ORDER_ANY, linuxkpi_sysuninit_shrinker, NULL);
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