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vm_pager: add methods for page insertion and removal notifications

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Reviewed by:	markj
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D37097
This commit is contained in:
Konstantin Belousov 2022-10-20 15:55:38 +03:00
parent d9dc64f158
commit d537d1f12e
3 changed files with 30 additions and 0 deletions
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4
sys/vm/vm_page.c
View File

@ -1483,6 +1483,7 @@ vm_page_insert_after(vm_page_t m, vm_object_t object, vm_pindex_t pindex,
return (1);
}
vm_page_insert_radixdone(m, object, mpred);
vm_pager_page_inserted(object, m);
return (0);
}
@ -1557,6 +1558,8 @@ vm_page_object_remove(vm_page_t m)
if ((m->a.flags & PGA_SWAP_FREE) != 0)
vm_pager_page_unswapped(m);
vm_pager_page_removed(object, m);
m->object = NULL;
mrem = vm_radix_remove(&object->rtree, m->pindex);
KASSERT(mrem == m, ("removed page %p, expected page %p", mrem, m));
@ -1879,6 +1882,7 @@ vm_page_rename(vm_page_t m, vm_object_t new_object, vm_pindex_t new_pindex)
vm_page_insert_radixdone(m, new_object, mpred);
vm_page_dirty(m);
vm_pager_page_inserted(new_object, m);
return (0);
}

2
sys/vm/vm_pager.c
View File

@ -430,6 +430,8 @@ vm_pager_alloc_dyn_type(struct pagerops *ops, int base_type)
FIX(mightbedirty);
FIX(getvp);
FIX(freespace);
FIX(page_inserted);
FIX(page_removed);
#undef FIX
}
pagertab[res] = ops; /* XXXKIB should be rel, but acq is too much */

24
sys/vm/vm_pager.h
View File

@ -69,6 +69,8 @@ typedef void pgo_getvp_t(vm_object_t object, struct vnode **vpp,
bool *vp_heldp);
typedef void pgo_freespace_t(vm_object_t object, vm_pindex_t start,
vm_size_t size);
typedef void pgo_page_inserted_t(vm_object_t object, vm_page_t m);
typedef void pgo_page_removed_t(vm_object_t object, vm_page_t m);
struct pagerops {
int pgo_kvme_type;
@ -87,6 +89,8 @@ struct pagerops {
pgo_mightbedirty_t *pgo_mightbedirty;
pgo_getvp_t *pgo_getvp;
pgo_freespace_t *pgo_freespace;
pgo_page_inserted_t *pgo_page_inserted;
pgo_page_removed_t *pgo_page_removed;
};
extern const struct pagerops defaultpagerops;
@ -249,6 +253,26 @@ vm_pager_freespace(vm_object_t object, vm_pindex_t start,
method(object, start, size);
}
static __inline void
vm_pager_page_inserted(vm_object_t object, vm_page_t m)
{
pgo_page_inserted_t *method;
method = pagertab[object->type]->pgo_page_inserted;
if (method != NULL)
method(object, m);
}
static __inline void
vm_pager_page_removed(vm_object_t object, vm_page_t m)
{
pgo_page_removed_t *method;
method = pagertab[object->type]->pgo_page_removed;
if (method != NULL)
method(object, m);
}
int vm_pager_alloc_dyn_type(struct pagerops *ops, int base_type);
void vm_pager_free_dyn_type(objtype_t type);