Centralize the logic in vfs_vmio_unwire() and sendfile_free_page().

Both of these functions atomically unwire a page, optionally attempt
to free the page, and enqueue or requeue the page.  Add functions
vm_page_release() and vm_page_release_locked() to perform the same task.
The latter must be called with the page's object lock held.

As a side effect of this refactoring, the buffer cache will no longer
attempt to free mapped pages when completing direct I/O.  This is
consistent with the handling of pages by sendfile(SF_NOCACHE).

Reviewed by:	alc, kib
MFC after:	2 weeks
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D20986

0 files changed, 0 insertions, 0 deletions