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Use a different mechanism to get the vnlru process to wake up and notice

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the shutdown request at reboot/halt time.
Disable the printf 'vnlru process getting nowhere, pausing...' and instead
export the count to the debug.vnlru_nowhere sysctl.
This commit is contained in:
Peter Wemm 2001-12-19 01:31:12 +00:00
parent c8e555ec14
commit 8f0d41d324
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=88160
2 changed files with 15 additions and 4 deletions
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1
sys/kern/kern_kthread.c
View File

@ -149,6 +149,7 @@ kthread_suspend(struct proc *p, int timo)
return (EINVAL);
}
SIGADDSET(p->p_siglist, SIGSTOP);
wakeup(p);
return msleep(&p->p_siglist, &p->p_mtx, PPAUSE | PDROP, "suspkt", timo);
}

18
sys/kern/vfs_subr.c
View File

@ -247,6 +247,9 @@ SYSCTL_INT(_kern, KERN_MAXVNODES, maxvnodes, CTLFLAG_RW,
static int minvnodes;
SYSCTL_INT(_kern, OID_AUTO, minvnodes, CTLFLAG_RW,
&minvnodes, 0, "Minimum number of vnodes");
static int vnlru_nowhere = 0;
SYSCTL_INT(_debug, OID_AUTO, vnlru_nowhere, CTLFLAG_RW, &vnlru_nowhere, 0,
"Number of times the vnlru process ran without success");
/*
* Initialize the vnode management data structures.
@ -594,7 +597,7 @@ vnlru_proc(void)
kthread_suspend_check(p);
if (numvnodes - freevnodes <= desiredvnodes * 9 / 10) {
vnlruproc_sig = 0;
tsleep(&vnlruproc, PVFS, "vlruwt", hz);
tsleep(vnlruproc, PVFS, "vlruwt", 0);
continue;
}
done = 0;
@ -611,8 +614,15 @@ vnlru_proc(void)
}
mtx_unlock(&mountlist_mtx);
if (done == 0) {
printf("vnlru process getting nowhere, pausing..\n");
tsleep(&vnlru_proc, PPAUSE, "vlrup", hz * 3);
#if 0
/* These messages are temporary debugging aids */
if (vnlru_nowhere < 5)
printf("vnlru process getting nowhere..\n");
else if (vnlru_nowhere == 5)
printf("vnlru process messages stopped.\n");
#endif
vnlru_nowhere++;
tsleep(vnlru_proc, PPAUSE, "vlrup", hz * 3);
}
}
splx(s);
@ -655,7 +665,7 @@ getnewvnode(tag, mp, vops, vpp)
*/
if (vnlruproc_sig == 0 && numvnodes - freevnodes > desiredvnodes) {
vnlruproc_sig = 1; /* avoid unnecessary wakeups */
wakeup(&vnlruproc);
wakeup(vnlruproc);
}
/*