/*
* Same as above, but forces the page to be detached from the object
* and go into free pool.
*/
void
sf_ext_free_nocache(void *arg1, void *arg2)
{
struct sf_buf *sf = arg1;
struct sendfile_sync *sfs = arg2;
vm_page_t pg = sf_buf_page(sf);
sf_buf_free(sf);
vm_page_lock(pg);
if (vm_page_unwire(pg, PQ_NONE)) {
vm_object_t obj;
/* Try to free the page, but only if it is cheap to. */
if ((obj = pg->object) == NULL)
vm_page_free(pg);
else if (!vm_page_xbusied(pg) && VM_OBJECT_TRYWLOCK(obj)) {
vm_page_free(pg);
VM_OBJECT_WUNLOCK(obj);
} else
vm_page_deactivate(pg);
}
vm_page_unlock(pg);
if (sfs != NULL) {
mtx_lock(&sfs->mtx);
KASSERT(sfs->count > 0, ("Sendfile sync botchup count == 0"));
if (--sfs->count == 0)
cv_signal(&sfs->cv);
mtx_unlock(&sfs->mtx);
}
}
/*
* Detach mapped page and release resources back to the system. Called
* by mbuf(9) code when last reference to a page is freed.
*/
void
sf_ext_free(void *arg1, void *arg2)
{
struct sf_buf *sf = arg1;
struct sendfile_sync *sfs = arg2;
vm_page_t pg = sf_buf_page(sf);
sf_buf_free(sf);
vm_page_lock(pg);
/*
* Check for the object going away on us. This can
* happen since we don't hold a reference to it.
* If so, we're responsible for freeing the page.
*/
if (vm_page_unwire(pg, PQ_INACTIVE) && pg->object == NULL)
vm_page_free(pg);
vm_page_unlock(pg);
if (sfs != NULL) {
mtx_lock(&sfs->mtx);
KASSERT(sfs->count > 0, ("Sendfile sync botchup count == 0"));
if (--sfs->count == 0)
cv_signal(&sfs->cv);
mtx_unlock(&sfs->mtx);
}
}
/*
* Free an sf_buf with attached page.
*/
static void
zbuf_sfbuf_free(struct sf_buf *sf)
{
vm_page_t pp;
pp = sf_buf_page(sf);
sf_buf_free(sf);
zbuf_page_free(pp);
}
void
exec_unmap_first_page(struct image_params *imgp)
{
vm_page_t m;
if (imgp->firstpage != NULL) {
m = sf_buf_page(imgp->firstpage);
sf_buf_free(imgp->firstpage);
imgp->firstpage = NULL;
vm_page_lock(m);
vm_page_unhold(m);
vm_page_unlock(m);
}
}
static void
socow_iodone(void *addr, void *args)
{
struct sf_buf *sf;
vm_page_t pp;
sf = args;
pp = sf_buf_page(sf);
sf_buf_free(sf);
/* remove COW mapping */
vm_page_lock(pp);
vm_page_cowclear(pp);
vm_page_unwire(pp, 0);
/*
* Check for the object going away on us. This can
* happen since we don't hold a reference to it.
* If so, we're responsible for freeing the page.
*/
if (pp->wire_count == 0 && pp->object == NULL)
vm_page_free(pp);
vm_page_unlock(pp);
socow_stats.iodone++;
}
