CSS/Harvard 2.9BSD bug report #1
Keith Bostic
keith at seismo.CSS.GOV
Wed Sep 18 15:25:29 AEST 1985
Subject: 2.9 traps in exec
Index: sys/sys1.c 2.9BSD
Description:
The kernel panics with something akin to this in the stack.
~panic
~mapin
~iupdat
~iput
~closef
~setregs
~exece
Repeat-By:
It's different on every system, you find it when you raise
MAXUSERS to the teens or above.
Fix:
Apply the following diff to sys1.c. The problem is that
KDSA5 needs to be reset.
*** sys1.c.right Tue Sep 17 14:16:07 1985
--- sys1.c.wrong Mon Aug 19 23:59:28 1985
***************
*** 248,259
}
(void) suword((caddr_t) ap, 0);
(void) suword((caddr_t) (-NBPW), 0);
- if (bp) {
- mapout(bp);
- bp->b_flags |= B_AGE;
- brelse(bp);
- bp = 0;
- }
setregs();
bad:
if (bp) {
--- 247,252 -----
}
(void) suword((caddr_t) ap, 0);
(void) suword((caddr_t) (-NBPW), 0);
setregs();
bad:
if (bp) {
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