/* Try to invalidate pages, for "fs flush" or "fs flushv"; or
* try to free pages, when deleting a file.
*
* Locking: the vcache entry's lock is held. It may be dropped and
* re-obtained.
*
* Since we drop and re-obtain the lock, we can't guarantee that there won't
* be some pages around when we return, newly created by concurrent activity.
*/
void
osi_VM_TryToSmush(struct vcache *avc, afs_ucred_t *acred, int sync)
{
ReleaseWriteLock(&avc->lock);
osi_VM_FlushVCache(avc, NULL);
ObtainWriteLock(&avc->lock, 59);
}
int
osi_TryEvictVCache(struct vcache *avc, int *slept, int defersleep) {
/*
* essentially all we want to do here is check that the
* vcache is not in use, then call vgone() (which will call
* inactive and reclaim as needed). This requires some
* kind of complicated locking, which we already need to implement
* for FlushVCache, so just call that routine here and check
* its return value for whether the vcache was evict-able.
*/
if (osi_VM_FlushVCache(avc, slept) != 0)
return 0;
else
return 1;
}
int
osi_TryEvictVCache(struct vcache *avc, int *slept, int defersleep)
{
int code;
/* Perhaps this function should use vgone() or vrecycle() instead. */
if ((afs_debug & AFSDEB_GENERAL) != 0) {
printf("%s enter\n", __func__);
}
if (osi_VM_FlushVCache(avc) != 0) {
code = 0;
} else {
code = 1;
}
if ((afs_debug & AFSDEB_GENERAL) != 0) {
printf("%s exit %d\n", __func__, code);
}
return code;
}
