tegge 2006-06-02 00:26:27 UTC
FreeBSD src repository
Modified files: (Branch: RELENG_6)
sys/kern kern_exit.c
sys/vm vm_extern.h vm_glue.c vm_map.c vm_map.h
vm_meter.c
Log:
MFC: Close race between vmspace_exitfree() and exit1() and races between
vmspace_exitfree() and vmspace_free() which could result in the same
vmspace being freed twice.
Factor out part of exit1() into new function vmspace_exit(). Attach
to vmspace0 to allow old vmspace to be freed earlier.
Add new function, vmspace_acquire_ref(), for obtaining a vmspace
reference for a vmspace belonging to another process. Avoid changing
vmspace refcount from 0 to 1 since that could also lead to the same
vmspace being freed twice.
Change vmtotal() and swapout_procs() to use vmspace_acquire_ref().
Revision Changes Path
1.263.2.9 +2 -30 src/sys/kern/kern_exit.c
1.76.2.2 +2 -0 src/sys/vm/vm_extern.h
1.213.2.2 +3 -6 src/sys/vm/vm_glue.c
1.366.2.3 +93 -16 src/sys/vm/vm_map.c
1.117.2.1 +0 -1 src/sys/vm/vm_map.h
1.85.2.1 +6 -1 src/sys/vm/vm_meter.c
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