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| author | kib <kib@FreeBSD.org> | 2013-07-11 05:58:28 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2013-07-11 05:58:28 +0000 |
| commit | bea7bbed5f6e4857faba6bb624d815af08679e0e (patch) | |
| tree | 89a387f2b549d97903dbd971206d9bebc8f15742 /sys/vm/vm_radix.c | |
| parent | 04554f0bf4d7f86323af1b2e5fff31973e050499 (diff) | |
| download | FreeBSD-src-bea7bbed5f6e4857faba6bb624d815af08679e0e.zip FreeBSD-src-bea7bbed5f6e4857faba6bb624d815af08679e0e.tar.gz | |
The vm_fault() should not be allowed to proceed on the map entry which
is being wired now. The entry wired count is changed to non-zero in
advance, before the map lock is dropped. This makes the vm_fault() to
perceive the entry as wired, and breaks the fragment which moves the
wire count from the shadowed page, to the upper page, making the code
unwiring non-wired page.
On the other hand, the vm_fault() calls from vm_fault_wire() should be
allowed to proceed, so only drain MAP_ENTRY_IN_TRANSITION from
vm_fault() when wiring_thread is not current.
Reported and tested by: pho
Reviewed by: alc
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Diffstat (limited to 'sys/vm/vm_radix.c')
0 files changed, 0 insertions, 0 deletions
