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| author | attilio <attilio@FreeBSD.org> | 2013-08-05 08:55:35 +0000 |
|---|---|---|
| committer | attilio <attilio@FreeBSD.org> | 2013-08-05 08:55:35 +0000 |
| commit | 899ab645146d3b9d10334951eb65770773ed3630 (patch) | |
| tree | 668bc05fd597966d485deb8ea05c427ee434fde6 /sys/vm/vm_map.h | |
| parent | 05101f7501be1dd160855b1f31fcbe7c123817ec (diff) | |
| download | FreeBSD-src-899ab645146d3b9d10334951eb65770773ed3630.zip FreeBSD-src-899ab645146d3b9d10334951eb65770773ed3630.tar.gz | |
Revert r253939:
We cannot busy a page before doing pagefaults.
Infact, it can deadlock against vnode lock, as it tries to vget().
Other functions, right now, have an opposite lock ordering, like
vm_object_sync(), which acquires the vnode lock first and then
sleeps on the busy mechanism.
Before this patch is reinserted we need to break this ordering.
Sponsored by: EMC / Isilon storage division
Reported by: kib
Diffstat (limited to 'sys/vm/vm_map.h')
| -rw-r--r-- | sys/vm/vm_map.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/sys/vm/vm_map.h b/sys/vm/vm_map.h index cdd9b87..824a9a0 100644 --- a/sys/vm/vm_map.h +++ b/sys/vm/vm_map.h @@ -329,7 +329,6 @@ long vmspace_resident_count(struct vmspace *vmspace); #define VM_FAULT_NORMAL 0 /* Nothing special */ #define VM_FAULT_CHANGE_WIRING 1 /* Change the wiring as appropriate */ #define VM_FAULT_DIRTY 2 /* Dirty the page; use w/VM_PROT_COPY */ -#define VM_FAULT_IOBUSY 4 /* Busy the faulted page */ /* * Initially, mappings are slightly sequential. The maximum window size must |
