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| H A D | vm_fault.c | diff d5efa0a4755217a76a563561c7cfb3ecb69269c8 Mon Aug 28 18:55:43 CEST 2017 Alan Cox <alc@FreeBSD.org> Switching from a global hash table to per-vm_object radix tries for mapping
vm_object page indices to on-disk swap space (r322913) has changed the
synchronization requirements for a couple swap pager functions. Whereas
before a read lock on the vm object sufficed because of the global mutex
on the hash table, a write lock on the vm object may now be required. In
particular, calls to vm_pager_page_unswapped() now require a write lock on
the vm_object. Consequently, vm_fault()'s fast path cannot call
vm_pager_page_unswapped(). The swap space will have to be released at a
later point.
Reviewed by: kib, markj
X-MFC with: r322913
Differential Revision: https://reviews.freebsd.org/D12134
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