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Put the scheduler, vmdaemon, and pagedaemon kthreads back under Giant for

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now.  The proc locking isn't actually safe yet and won't be until the proc
locking is finished.
This commit is contained in:
John Baldwin 2001-06-20 00:48:20 +00:00
parent 29dfd70b01
commit 69a78d4666
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=78481
2 changed files with 1 additions and 19 deletions
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3
sys/vm/vm_glue.c
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@ -374,7 +374,6 @@ scheduler(dummy)
int ppri;
mtx_assert(&Giant, MA_OWNED | MA_NOTRECURSED);
mtx_unlock(&Giant);
loop:
mtx_lock(&vm_mtx);
@ -426,11 +425,9 @@ scheduler(dummy)
/*
* We would like to bring someone in. (only if there is space).
*/
mtx_lock(&Giant);
PROC_LOCK(p);
faultin(p);
PROC_UNLOCK(p);
mtx_unlock(&Giant);
mtx_lock_spin(&sched_lock);
p->p_swtime = 0;
mtx_unlock_spin(&sched_lock);

17
sys/vm/vm_pageout.c
View File

@ -1349,6 +1349,7 @@ vm_pageout()
{
int pass;
mtx_lock(&Giant);
mtx_lock(&vm_mtx);
/*
@ -1465,11 +1466,7 @@ vm_pageout()
if (vm_pages_needed)
cnt.v_pdwakeups++;
splx(s);
mtx_unlock(&vm_mtx);
mtx_lock(&Giant);
mtx_lock(&vm_mtx);
vm_pageout_scan(pass);
mtx_unlock(&Giant);
vm_pageout_deficit = 0;
}
}
@ -1500,13 +1497,8 @@ vm_daemon()
{
struct proc *p;
#ifndef rlimlocked
mtx_lock(&Giant);
#endif
while (TRUE) {
#ifdef rlimlocked
mtx_lock(&Giant);
#endif
mtx_lock(&vm_mtx);
msleep(&vm_daemon_needed, &vm_mtx, PPAUSE, "psleep", 0);
if (vm_pageout_req_swapout) {
@ -1515,13 +1507,6 @@ vm_daemon()
vm_pageout_req_swapout = 0;
}
mtx_unlock(&vm_mtx);
#ifdef rlimlocked
/*
* XXX: we can't do this yet because Giant still protects
* the per-process resource limits that we check below.
*/
mtx_unlock(&Giant);
#endif
/*
* scan the processes for exceeding their rlimits or if
* process is swapped out -- deactivate pages