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uvm_fault has been sensible about when to return ENOMEM for some time now,

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so it's reasonable for us to kill processes when we get it returned,
rather than sleeping.  Do that.
This commit is contained in:
bjh21 2006-09-24 20:54:14 +00:00
parent c0a3cb955a
commit 7841bf68c0
1 changed files with 13 additions and 11 deletions
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24
sys/arch/acorn26/acorn26/except.c
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@ -1,4 +1,4 @@
/* $NetBSD: except.c,v 1.12 2006/07/19 21:11:39 ad Exp $ */
/* $NetBSD: except.c,v 1.13 2006/09/24 20:54:14 bjh21 Exp $ */
/*-
* Copyright (c) 1998, 1999, 2000 Ben Harris
* All rights reserved.
@ -31,11 +31,12 @@
#include <sys/param.h>
__KERNEL_RCSID(0, "$NetBSD: except.c,v 1.12 2006/07/19 21:11:39 ad Exp $");
__KERNEL_RCSID(0, "$NetBSD: except.c,v 1.13 2006/09/24 20:54:14 bjh21 Exp $");
#include "opt_ddb.h"
#include <sys/errno.h>
#include <sys/kauth.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <sys/systm.h>
@ -205,14 +206,7 @@ do_fault(struct trapframe *tf, struct lwp *l,
KASSERT(current_intr_depth == 0);
for (;;) {
error = uvm_fault(map, va, atype);
if (error != ENOMEM)
break;
log(LOG_WARNING, "pid %d.%d: VM shortage, sleeping\n",
l->l_proc->p_pid, l->l_lid);
tsleep(&lbolt, PVM, "abtretry", 0);
}
error = uvm_fault(map, va, atype);
if (error != 0) {
ksiginfo_t ksi;
@ -225,7 +219,15 @@ do_fault(struct trapframe *tf, struct lwp *l,
return;
}
KSI_INIT_TRAP(&ksi);
ksi.ksi_signo = SIGSEGV;
if (error == ENOMEM) {
printf("UVM: pid %d (%s), uid %d killed: "
"out of swap\n",
l->l_proc->p_pid, l->l_proc->p_comm,
l->l_cred ? kauth_cred_geteuid(l->l_cred) : -1);
ksi.ksi_signo = SIGKILL;
} else
ksi.ksi_signo = SIGSEGV;
ksi.ksi_code = (error == EPERM) ? SEGV_ACCERR : SEGV_MAPERR;
ksi.ksi_addr = (void *) va;
trapsignal(l, &ksi);