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| author | tegge <tegge@FreeBSD.org> | 2006-05-29 21:28:56 +0000 |
|---|---|---|
| committer | tegge <tegge@FreeBSD.org> | 2006-05-29 21:28:56 +0000 |
| commit | 0d5f19116220da1e7a0df73c804bebeb5efdf862 (patch) | |
| tree | 2227714d6a33f215f9677debe94c947b9e3fc437 /sys/vm/vm_map.h | |
| parent | ff05f5f32b9783ffa4f05a2b79b7e54056d2f947 (diff) | |
| download | FreeBSD-src-0d5f19116220da1e7a0df73c804bebeb5efdf862.zip FreeBSD-src-0d5f19116220da1e7a0df73c804bebeb5efdf862.tar.gz | |
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().
Reviewed by: alc
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 cc97a48..de0ab0a 100644 --- a/sys/vm/vm_map.h +++ b/sys/vm/vm_map.h @@ -242,7 +242,6 @@ struct vmspace { caddr_t vm_taddr; /* (c) user virtual address of text */ caddr_t vm_daddr; /* (c) user virtual address of data */ caddr_t vm_maxsaddr; /* user VA at max stack growth */ - int vm_exitingcnt; /* several processes zombied in exit1 */ int vm_refcnt; /* number of references */ }; |
