Author: mjg
Date: Thu Jul 2 19:03:44 2015
New Revision: 285056
URL: https://svnweb.freebsd.org/changeset/base/285056
Log:
sysvshm: don't lock proc when calculating attach_va
vm_daddr is constant and RLIMIT_DATA can be obtained from thread's copy of
rlimits.
Modified:
head/sys/kern/sysv_shm.c
Modified: head/sys/kern/sysv_shm.c
==============================================================================
--- head/sys/kern/sysv_shm.c Thu Jul 2 19:00:22 2015 (r285055)
+++ head/sys/kern/sysv_shm.c Thu Jul 2 19:03:44 2015 (r285056)
@@ -380,10 +380,8 @@ kern_shmat_locked(struct thread *td, int
* This is just a hint to vm_map_find() about where to
* put it.
*/
- PROC_LOCK(p);
attach_va = round_page((vm_offset_t)p->p_vmspace->vm_daddr +
- lim_max_proc(p, RLIMIT_DATA));
- PROC_UNLOCK(p);
+ lim_max(td, RLIMIT_DATA));
}
vm_object_reference(shmseg->object);
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