tmpfs: correct reported st_blocks/va_bytes Previously the reported value did not accounted for the swapped out pages.
uiomove_object: hide diagnostic under bootverbose
tmpfs: for used pages, account really allocated pages, instead of file sizes This makes tmpfs size accounting correct for the sparce files. PR: 223015
vm_pager: add method to veto page allocation
vm_pager: add methods for page insertion and removal notifications
tmpfs: make vm_object point to the tmpfs node instead of vnode The vnode could be reclaimed and allocated again during the lifecycle of the node, but the node cannot. Also, referencing the node would allow to reach it and tmpfs mount data from the object, regardless of the state of the possibly absent vnode. Still use swp_tmpfs for back-pointer, instead of using handle. Use of named swap objects would incur taking the sw_alloc_sx on node allocation and deallocation. swp_tmpfs is renamed to swp_priv to remove the last bit of tmpfs in vm/.
Add 'show tmpfs' ddb command
Tested by: pho