Date: Thu, 18 Jan 2024 01:14:01 GMT
From: Konstantin Belousov <kib@FreeBSD.org>
To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org
Subject: git: 282fd2c39ee6 - stable/13 - Add vnode_pager_clean_{a,}sync(9)
Message-ID: <202401180114.40I1E1qm053389@gitrepo.freebsd.org>
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The branch stable/13 has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=282fd2c39ee6df6104d54388f622471fe3e7ab3a commit 282fd2c39ee6df6104d54388f622471fe3e7ab3a Author: Konstantin Belousov <kib@FreeBSD.org> AuthorDate: 2024-01-08 05:18:40 +0000 Commit: Konstantin Belousov <kib@FreeBSD.org> CommitDate: 2024-01-18 01:02:52 +0000 Add vnode_pager_clean_{a,}sync(9) (cherry picked from commit b068bb09a1a82d9fef0e939ad6135443a959e290) --- .../openzfs/include/os/freebsd/spl/sys/vnode.h | 9 +++--- sys/fs/fuse/fuse_io.c | 7 ++-- sys/fs/nfsclient/nfs_clbio.c | 8 ++--- sys/fs/nfsclient/nfs_clnode.c | 17 +++------- sys/fs/nfsclient/nfs_clvnops.c | 27 ++++------------ sys/fs/nfsserver/nfs_nfsdport.c | 8 ++--- sys/fs/smbfs/smbfs_io.c | 7 +--- sys/kern/vfs_aio.c | 9 ++---- sys/kern/vfs_subr.c | 37 ++++++++-------------- sys/kern/vfs_syscalls.c | 7 ++-- sys/kern/vfs_vnops.c | 9 ++---- sys/sys/param.h | 2 +- sys/ufs/ffs/ffs_rawread.c | 14 +++----- sys/ufs/ufs/ufs_bmap.c | 9 ++---- sys/vm/vnode_pager.c | 27 ++++++++++++++++ sys/vm/vnode_pager.h | 3 ++ 16 files changed, 82 insertions(+), 118 deletions(-) diff --git a/sys/contrib/openzfs/include/os/freebsd/spl/sys/vnode.h b/sys/contrib/openzfs/include/os/freebsd/spl/sys/vnode.h index 00f718eadb3f..29f4642580c6 100644 --- a/sys/contrib/openzfs/include/os/freebsd/spl/sys/vnode.h +++ b/sys/contrib/openzfs/include/os/freebsd/spl/sys/vnode.h @@ -61,6 +61,7 @@ enum symfollow { NO_FOLLOW = NOFOLLOW }; #include <sys/syscallsubr.h> #include <sys/vm.h> #include <vm/vm_object.h> +#include <vm/vnode_pager.h> typedef struct vop_vector vnodeops_t; #define VOP_FID VOP_VPTOFH @@ -95,11 +96,11 @@ vn_flush_cached_data(vnode_t *vp, boolean_t sync) #else if (vp->v_object->flags & OBJ_MIGHTBEDIRTY) { #endif - int flags = sync ? OBJPC_SYNC : 0; vn_lock(vp, LK_SHARED | LK_RETRY); - zfs_vmobject_wlock(vp->v_object); - vm_object_page_clean(vp->v_object, 0, 0, flags); - zfs_vmobject_wunlock(vp->v_object); + if (sync) + vnode_pager_clean_sync(vp); + else + vnode_pager_clean_async(vp); VOP_UNLOCK(vp); } } diff --git a/sys/fs/fuse/fuse_io.c b/sys/fs/fuse/fuse_io.c index 5dffe44e95c0..0646246545cc 100644 --- a/sys/fs/fuse/fuse_io.c +++ b/sys/fs/fuse/fuse_io.c @@ -96,6 +96,7 @@ #include <vm/vm_map.h> #include <vm/vm_page.h> #include <vm/vm_object.h> +#include <vm/vnode_pager.h> #include "fuse.h" #include "fuse_file.h" @@ -945,11 +946,7 @@ fuse_io_invalbuf(struct vnode *vp, struct thread *td) } fvdat->flag |= FN_FLUSHINPROG; - if (vp->v_bufobj.bo_object != NULL) { - VM_OBJECT_WLOCK(vp->v_bufobj.bo_object); - vm_object_page_clean(vp->v_bufobj.bo_object, 0, 0, OBJPC_SYNC); - VM_OBJECT_WUNLOCK(vp->v_bufobj.bo_object); - } + vnode_pager_clean_sync(vp); error = vinvalbuf(vp, V_SAVE, PCATCH, 0); while (error) { if (error == ERESTART || error == EINTR) { diff --git a/sys/fs/nfsclient/nfs_clbio.c b/sys/fs/nfsclient/nfs_clbio.c index f6b8cc0a70a4..9a471f6681ca 100644 --- a/sys/fs/nfsclient/nfs_clbio.c +++ b/sys/fs/nfsclient/nfs_clbio.c @@ -1439,11 +1439,9 @@ ncl_vinvalbuf(struct vnode *vp, int flags, struct thread *td, int intrflg) /* * Now, flush as required. */ - if ((flags & (V_SAVE | V_VMIO)) == V_SAVE && - vp->v_bufobj.bo_object != NULL) { - VM_OBJECT_WLOCK(vp->v_bufobj.bo_object); - vm_object_page_clean(vp->v_bufobj.bo_object, 0, 0, OBJPC_SYNC); - VM_OBJECT_WUNLOCK(vp->v_bufobj.bo_object); + if ((flags & (V_SAVE | V_VMIO)) == V_SAVE) { + vnode_pager_clean_sync(vp); + /* * If the page clean was interrupted, fail the invalidation. * Not doing so, we run the risk of losing dirty pages in the diff --git a/sys/fs/nfsclient/nfs_clnode.c b/sys/fs/nfsclient/nfs_clnode.c index a7ace3cdadc9..203c3360e792 100644 --- a/sys/fs/nfsclient/nfs_clnode.c +++ b/sys/fs/nfsclient/nfs_clnode.c @@ -48,6 +48,8 @@ #include <sys/taskqueue.h> #include <sys/vnode.h> +#include <vm/vm_param.h> +#include <vm/vnode_pager.h> #include <vm/uma.h> #include <fs/nfs/nfsport.h> @@ -236,7 +238,6 @@ ncl_inactive(struct vop_inactive_args *ap) struct vnode *vp = ap->a_vp; struct nfsnode *np; struct thread *td; - boolean_t retv; td = curthread; np = VTONFS(vp); @@ -250,17 +251,9 @@ ncl_inactive(struct vop_inactive_args *ap) * buffers/pages must be flushed before the close, so that the * stateid is available for the writes. */ - if (vp->v_object != NULL) { - VM_OBJECT_WLOCK(vp->v_object); - retv = vm_object_page_clean(vp->v_object, 0, 0, - OBJPC_SYNC); - VM_OBJECT_WUNLOCK(vp->v_object); - } else - retv = TRUE; - if (retv == TRUE) { - (void)ncl_flush(vp, MNT_WAIT, td, 1, 0); - (void)nfsrpc_close(vp, 1, td); - } + vnode_pager_clean_sync(vp); + (void)ncl_flush(vp, MNT_WAIT, td, 1, 0); + (void)nfsrpc_close(vp, 1, td); } NFSLOCKNODE(np); diff --git a/sys/fs/nfsclient/nfs_clvnops.c b/sys/fs/nfsclient/nfs_clvnops.c index 05948b4d6ef6..411b7f82a445 100644 --- a/sys/fs/nfsclient/nfs_clvnops.c +++ b/sys/fs/nfsclient/nfs_clvnops.c @@ -67,6 +67,7 @@ #include <vm/vm.h> #include <vm/vm_extern.h> #include <vm/vm_object.h> +#include <vm/vnode_pager.h> #include <fs/nfs/nfsport.h> #include <fs/nfsclient/nfsnode.h> @@ -764,9 +765,7 @@ nfs_open(struct vop_open_args *ap) if (VN_IS_DOOMED(vp)) return (EBADF); } - VM_OBJECT_WLOCK(obj); - vm_object_page_clean(obj, 0, 0, OBJPC_SYNC); - VM_OBJECT_WUNLOCK(obj); + vnode_pager_clean_sync(vp); } /* Now, flush the buffer cache. */ @@ -852,9 +851,7 @@ nfs_close(struct vop_close_args *ap) if (VN_IS_DOOMED(vp) && ap->a_fflag != FNONBLOCK) return (EBADF); } - VM_OBJECT_WLOCK(vp->v_object); - vm_object_page_clean(vp->v_object, 0, 0, 0); - VM_OBJECT_WUNLOCK(vp->v_object); + vnode_pager_clean_async(vp); } NFSLOCKNODE(np); if (np->n_flag & NMODIFIED) { @@ -3663,7 +3660,6 @@ nfs_allocate(struct vop_allocate_args *ap) { struct vnode *vp = ap->a_vp; struct thread *td = curthread; - vm_object_t obj; struct nfsvattr nfsva; struct nfsmount *nmp; struct nfsnode *np; @@ -3693,12 +3689,7 @@ nfs_allocate(struct vop_allocate_args *ap) * file's allocation on the server. */ if (error == 0) { - obj = vp->v_object; - if (obj != NULL) { - VM_OBJECT_WLOCK(obj); - vm_object_page_clean(obj, 0, 0, OBJPC_SYNC); - VM_OBJECT_WUNLOCK(obj); - } + vnode_pager_clean_sync(vp); error = ncl_flush(vp, MNT_WAIT, td, 1, 0); } if (error == 0) @@ -3833,9 +3824,7 @@ relock: vn_finished_write(mp); goto relock; } - VM_OBJECT_WLOCK(invp_obj); - vm_object_page_clean(invp_obj, 0, 0, OBJPC_SYNC); - VM_OBJECT_WUNLOCK(invp_obj); + vnode_pager_clean_sync(invp); } error = ncl_flush(invp, MNT_WAIT, curthread, 1, 0); } @@ -3980,7 +3969,6 @@ static int nfs_ioctl(struct vop_ioctl_args *ap) { struct vnode *vp = ap->a_vp; - vm_object_t obj; struct nfsvattr nfsva; struct nfsmount *nmp; int attrflag, content, error, ret; @@ -4025,10 +4013,7 @@ nfs_ioctl(struct vop_ioctl_args *ap) * size is up to date on the Metadata Server. */ - obj = vp->v_object; - VM_OBJECT_WLOCK(obj); - vm_object_page_clean(obj, 0, 0, OBJPC_SYNC); - VM_OBJECT_WUNLOCK(obj); + vnode_pager_clean_sync(vp); error = ncl_flush(vp, MNT_WAIT, ap->a_td, 1, 0); if (error == 0) error = nfsrpc_seek(vp, (off_t *)ap->a_data, &eof, diff --git a/sys/fs/nfsserver/nfs_nfsdport.c b/sys/fs/nfsserver/nfs_nfsdport.c index 05cebdd13f7d..ebc560836205 100644 --- a/sys/fs/nfsserver/nfs_nfsdport.c +++ b/sys/fs/nfsserver/nfs_nfsdport.c @@ -52,6 +52,8 @@ #include <sys/sysctl.h> #include <nlm/nlm_prot.h> #include <nlm/nlm.h> +#include <vm/vm_param.h> +#include <vm/vnode_pager.h> FEATURE(nfsd, "NFSv4 server"); @@ -1735,11 +1737,7 @@ nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred, /* * Give up and do the whole thing */ - if (vp->v_object && vm_object_mightbedirty(vp->v_object)) { - VM_OBJECT_WLOCK(vp->v_object); - vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); - VM_OBJECT_WUNLOCK(vp->v_object); - } + vnode_pager_clean_sync(vp); error = VOP_FSYNC(vp, MNT_WAIT, td); } else { /* diff --git a/sys/fs/smbfs/smbfs_io.c b/sys/fs/smbfs/smbfs_io.c index f09254289769..324f38abd10e 100644 --- a/sys/fs/smbfs/smbfs_io.c +++ b/sys/fs/smbfs/smbfs_io.c @@ -636,12 +636,7 @@ smbfs_vinvalbuf(struct vnode *vp, struct thread *td) } np->n_flag |= NFLUSHINPROG; - if (vp->v_bufobj.bo_object != NULL) { - VM_OBJECT_WLOCK(vp->v_bufobj.bo_object); - vm_object_page_clean(vp->v_bufobj.bo_object, 0, 0, OBJPC_SYNC); - VM_OBJECT_WUNLOCK(vp->v_bufobj.bo_object); - } - + vnode_pager_clean_sync(vp); error = vinvalbuf(vp, V_SAVE, PCATCH, 0); while (error) { if (error == ERESTART || error == EINTR) { diff --git a/sys/kern/vfs_aio.c b/sys/kern/vfs_aio.c index 1bdd32ed7969..a5b179e9d7d3 100644 --- a/sys/kern/vfs_aio.c +++ b/sys/kern/vfs_aio.c @@ -68,6 +68,7 @@ #include <vm/pmap.h> #include <vm/vm_map.h> #include <vm/vm_object.h> +#include <vm/vnode_pager.h> #include <vm/uma.h> #include <sys/aio.h> @@ -718,7 +719,6 @@ static int aio_fsync_vnode(struct thread *td, struct vnode *vp, int op) { struct mount *mp; - vm_object_t obj; int error; for (;;) { @@ -726,12 +726,7 @@ aio_fsync_vnode(struct thread *td, struct vnode *vp, int op) if (error != 0) break; vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); - obj = vp->v_object; - if (obj != NULL) { - VM_OBJECT_WLOCK(obj); - vm_object_page_clean(obj, 0, 0, 0); - VM_OBJECT_WUNLOCK(obj); - } + vnode_pager_clean_async(vp); if (op == LIO_DSYNC) error = VOP_FDATASYNC(vp, td); else diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c index 1166fd6c5389..33232987705e 100644 --- a/sys/kern/vfs_subr.c +++ b/sys/kern/vfs_subr.c @@ -95,6 +95,7 @@ #include <vm/vm_map.h> #include <vm/vm_page.h> #include <vm/vm_kern.h> +#include <vm/vnode_pager.h> #include <vm/uma.h> #if defined(DEBUG_VFS_LOCKS) && (!defined(INVARIANTS) || !defined(WITNESS)) @@ -4016,7 +4017,6 @@ vdrop_recycle(struct vnode *vp) static int vinactivef(struct vnode *vp) { - struct vm_object *obj; int error; ASSERT_VOP_ELOCKED(vp, "vinactive"); @@ -4027,6 +4027,7 @@ vinactivef(struct vnode *vp) vp->v_iflag |= VI_DOINGINACT; vp->v_iflag &= ~VI_OWEINACT; VI_UNLOCK(vp); + /* * Before moving off the active list, we must be sure that any * modified pages are converted into the vnode's dirty @@ -4037,12 +4038,9 @@ vinactivef(struct vnode *vp) * point that VOP_INACTIVE() is called, there could still be * pending I/O and dirty pages in the object. */ - if ((obj = vp->v_object) != NULL && (vp->v_vflag & VV_NOSYNC) == 0 && - vm_object_mightbedirty(obj)) { - VM_OBJECT_WLOCK(obj); - vm_object_page_clean(obj, 0, 0, 0); - VM_OBJECT_WUNLOCK(obj); - } + if ((vp->v_vflag & VV_NOSYNC) == 0) + vnode_pager_clean_async(vp); + error = VOP_INACTIVE(vp); VI_LOCK(vp); VNASSERT(vp->v_iflag & VI_DOINGINACT, vp, @@ -4141,11 +4139,7 @@ loop: * vnodes open for writing. */ if (flags & WRITECLOSE) { - if (vp->v_object != NULL) { - VM_OBJECT_WLOCK(vp->v_object); - vm_object_page_clean(vp->v_object, 0, 0, 0); - VM_OBJECT_WUNLOCK(vp->v_object); - } + vnode_pager_clean_async(vp); do { error = VOP_FSYNC(vp, MNT_WAIT, td); } while (error == ERELOOKUP); @@ -5208,17 +5202,12 @@ static void __noinline vfs_periodic_msync_inactive(struct mount *mp, int flags) { struct vnode *vp, *mvp; - struct vm_object *obj; - int lkflags, objflags; + int lkflags; bool seen_defer; lkflags = LK_EXCLUSIVE | LK_INTERLOCK; - if (flags != MNT_WAIT) { + if (flags != MNT_WAIT) lkflags |= LK_NOWAIT; - objflags = OBJPC_NOSYNC; - } else { - objflags = OBJPC_SYNC; - } MNT_VNODE_FOREACH_LAZY(vp, mp, mvp, vfs_periodic_msync_inactive_filter, NULL) { seen_defer = false; @@ -5234,11 +5223,11 @@ vfs_periodic_msync_inactive(struct mount *mp, int flags) continue; } if (vget(vp, lkflags) == 0) { - obj = vp->v_object; - if (obj != NULL && (vp->v_vflag & VV_NOSYNC) == 0) { - VM_OBJECT_WLOCK(obj); - vm_object_page_clean(obj, 0, 0, objflags); - VM_OBJECT_WUNLOCK(obj); + if ((vp->v_vflag & VV_NOSYNC) == 0) { + if (flags == MNT_WAIT) + vnode_pager_clean_sync(vp); + else + vnode_pager_clean_async(vp); } vput(vp); if (seen_defer) diff --git a/sys/kern/vfs_syscalls.c b/sys/kern/vfs_syscalls.c index cf733133bec0..830f0d008aca 100644 --- a/sys/kern/vfs_syscalls.c +++ b/sys/kern/vfs_syscalls.c @@ -82,6 +82,7 @@ #include <vm/vm.h> #include <vm/vm_object.h> #include <vm/vm_page.h> +#include <vm/vnode_pager.h> #include <vm/uma.h> #include <fs/devfs/devfs.h> @@ -3529,11 +3530,7 @@ retry: goto drop; vn_lock(vp, vn_lktype_write(mp, vp) | LK_RETRY); AUDIT_ARG_VNODE1(vp); - if (vp->v_object != NULL) { - VM_OBJECT_WLOCK(vp->v_object); - vm_object_page_clean(vp->v_object, 0, 0, 0); - VM_OBJECT_WUNLOCK(vp->v_object); - } + vnode_pager_clean_async(vp); error = fullsync ? VOP_FSYNC(vp, MNT_WAIT, td) : VOP_FDATASYNC(vp, td); VOP_UNLOCK(vp); vn_finished_write(mp); diff --git a/sys/kern/vfs_vnops.c b/sys/kern/vfs_vnops.c index be3739f41086..d2df3e2c5e4d 100644 --- a/sys/kern/vfs_vnops.c +++ b/sys/kern/vfs_vnops.c @@ -90,6 +90,7 @@ #include <vm/vm_object.h> #include <vm/vm_page.h> #include <vm/vm_pager.h> +#include <vm/vnode_pager.h> #ifdef HWPMC_HOOKS #include <sys/pmckern.h> @@ -2551,7 +2552,6 @@ vn_pages_remove_valid(struct vnode *vp, vm_pindex_t start, vm_pindex_t end) int vn_bmap_seekhole(struct vnode *vp, u_long cmd, off_t *off, struct ucred *cred) { - vm_object_t obj; struct vattr va; daddr_t bn, bnp; uint64_t bsize; @@ -2577,12 +2577,7 @@ vn_bmap_seekhole(struct vnode *vp, u_long cmd, off_t *off, struct ucred *cred) } /* See the comment in ufs_bmap_seekdata(). */ - obj = vp->v_object; - if (obj != NULL) { - VM_OBJECT_WLOCK(obj); - vm_object_page_clean(obj, 0, 0, OBJPC_SYNC); - VM_OBJECT_WUNLOCK(obj); - } + vnode_pager_clean_sync(vp); bsize = vp->v_mount->mnt_stat.f_iosize; for (bn = noff / bsize; noff < va.va_size; bn++, noff += bsize - diff --git a/sys/sys/param.h b/sys/sys/param.h index f1c0d969b369..bf8697633d18 100644 --- a/sys/sys/param.h +++ b/sys/sys/param.h @@ -59,7 +59,7 @@ * in the range 5 to 9. */ #undef __FreeBSD_version -#define __FreeBSD_version 1302510 /* Master, propagated to newvers */ +#define __FreeBSD_version 1302511 /* Master, propagated to newvers */ /* * __FreeBSD_kernel__ indicates that this system uses the kernel of FreeBSD, diff --git a/sys/ufs/ffs/ffs_rawread.c b/sys/ufs/ffs/ffs_rawread.c index ef93c1ab6783..3a415d766303 100644 --- a/sys/ufs/ffs/ffs_rawread.c +++ b/sys/ufs/ffs/ffs_rawread.c @@ -52,6 +52,7 @@ #include <vm/vm.h> #include <vm/vm_extern.h> #include <vm/vm_object.h> +#include <vm/vnode_pager.h> static int ffs_rawread_readahead(struct vnode *vp, caddr_t udata, @@ -132,15 +133,10 @@ ffs_rawread_sync(struct vnode *vp) vn_finished_write(mp); return (EIO); } - /* Attempt to msync mmap() regions to clean dirty mmap */ - if ((obj = vp->v_object) != NULL && - vm_object_mightbedirty(obj)) { - VI_UNLOCK(vp); - VM_OBJECT_WLOCK(obj); - vm_object_page_clean(obj, 0, 0, OBJPC_SYNC); - VM_OBJECT_WUNLOCK(obj); - } else - VI_UNLOCK(vp); + VI_UNLOCK(vp); + + /* Attempt to msync mmap() regions to clean dirty mmap */ + vnode_pager_clean_sync(vp); /* Wait for pending writes to complete */ BO_LOCK(bo); diff --git a/sys/ufs/ufs/ufs_bmap.c b/sys/ufs/ufs/ufs_bmap.c index 44aeefe17d13..4311f771409f 100644 --- a/sys/ufs/ufs/ufs_bmap.c +++ b/sys/ufs/ufs/ufs_bmap.c @@ -51,6 +51,7 @@ #include <vm/vm.h> #include <vm/vm_object.h> +#include <vm/vnode_pager.h> #include <ufs/ufs/extattr.h> #include <ufs/ufs/quota.h> @@ -350,7 +351,6 @@ ufs_bmap_seekdata(struct vnode *vp, off_t *offp) struct inode *ip; struct mount *mp; struct ufsmount *ump; - vm_object_t obj; ufs2_daddr_t bn, daddr, nextbn; uint64_t bsize; off_t numblks; @@ -373,12 +373,7 @@ ufs_bmap_seekdata(struct vnode *vp, off_t *offp) * pages into buffer writes to ensure that we see all * allocated data. */ - obj = vp->v_object; - if (obj != NULL) { - VM_OBJECT_WLOCK(obj); - vm_object_page_clean(obj, 0, 0, OBJPC_SYNC); - VM_OBJECT_WUNLOCK(obj); - } + vnode_pager_clean_sync(vp); bsize = mp->mnt_stat.f_iosize; for (bn = *offp / bsize, numblks = howmany(ip->i_size, bsize); diff --git a/sys/vm/vnode_pager.c b/sys/vm/vnode_pager.c index b994de8592db..62cc9d35b653 100644 --- a/sys/vm/vnode_pager.c +++ b/sys/vm/vnode_pager.c @@ -1622,3 +1622,30 @@ vnode_pager_getvp(vm_object_t object, struct vnode **vpp, bool *vp_heldp) { *vpp = object->handle; } + +static void +vnode_pager_clean1(struct vnode *vp, int sync_flags) +{ + struct vm_object *obj; + + ASSERT_VOP_LOCKED(vp, "needs lock for writes"); + obj = vp->v_object; + if (obj == NULL) + return; + + VM_OBJECT_WLOCK(obj); + vm_object_page_clean(obj, 0, 0, sync_flags); + VM_OBJECT_WUNLOCK(obj); +} + +void +vnode_pager_clean_sync(struct vnode *vp) +{ + vnode_pager_clean1(vp, OBJPC_SYNC); +} + +void +vnode_pager_clean_async(struct vnode *vp) +{ + vnode_pager_clean1(vp, 0); +} diff --git a/sys/vm/vnode_pager.h b/sys/vm/vnode_pager.h index 558d080717b7..ca98cf9cdd24 100644 --- a/sys/vm/vnode_pager.h +++ b/sys/vm/vnode_pager.h @@ -41,6 +41,9 @@ #ifdef _KERNEL +struct vnode; +void vnode_pager_clean_sync(struct vnode *vp); +void vnode_pager_clean_async(struct vnode *vp); int vnode_pager_generic_getpages(struct vnode *vp, vm_page_t *m, int count, int *rbehind, int *rahead, vop_getpages_iodone_t iodone, void *arg);
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