mirror_zfs/module/os/freebsd/spl/spl_vm.c
Rob Norris 238eab7dc1 FreeBSD: zfs_putpages: don't undirty pages until after write completes
zfs_putpages() would put the entire range of pages onto the ZIL, then
return VM_PAGER_OK for each page to the kernel. However, an associated
zil_commit() or txg sync had not happened at this point, so the write
may not actually be on disk.

So, we rework it to use a ZIL commit callback, and do the post-write
work of undirtying the page and signaling completion there. We return
VM_PAGER_PEND to the kernel instead so it knows that we will take care
of it.

Sponsored-by: Klara, Inc.
Sponsored-by: Wasabi Technology, Inc.
Reviewed-by: Mark Johnston <markj@FreeBSD.org>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Closes #17445
2025-06-12 14:45:18 -07:00

75 lines
2.3 KiB
C

// SPDX-License-Identifier: BSD-2-Clause
/*
* Copyright (c) 2013 EMC Corp.
* 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 AUTHORS 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 AUTHORS 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/types.h>
#include <sys/param.h>
#include <sys/counter.h>
#include <sys/byteorder.h>
#include <sys/lock.h>
#include <sys/freebsd_rwlock.h>
#include <sys/vm.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/vm_pager.h>
const int zfs_vm_pagerret_bad = VM_PAGER_BAD;
const int zfs_vm_pagerret_error = VM_PAGER_ERROR;
const int zfs_vm_pagerret_ok = VM_PAGER_OK;
const int zfs_vm_pagerret_pend = VM_PAGER_PEND;
const int zfs_vm_pagerput_sync = VM_PAGER_PUT_SYNC;
const int zfs_vm_pagerput_inval = VM_PAGER_PUT_INVAL;
void
zfs_vmobject_assert_wlocked(vm_object_t object)
{
/*
* This is not ideal because FILE/LINE used by assertions will not
* be too helpful, but it must be an hard function for
* compatibility reasons.
*/
VM_OBJECT_ASSERT_WLOCKED(object);
}
void
zfs_vmobject_wlock(vm_object_t object)
{
VM_OBJECT_WLOCK(object);
}
void
zfs_vmobject_wunlock(vm_object_t object)
{
VM_OBJECT_WUNLOCK(object);
}