On Tue, Dec 13, 2016 at 03:49:32PM +0300, Slawa Olhovchenkov wrote:
> > Boot with NUMA enabled and interleave off.
>
> Already with patched kernel
>
> > Patch kernel with the 'if (1 || ...)' patch.
> > Reboot, enter BIOS setup and enable interleave there.
> > Try to boot - does it boot ?
>
> No.
>
> > If it did not booted, power machine off for 10 minutes.
>
> OK
>
> > Power it on, try to boot (with the same patched kernel).
> > Does the machine boot now ?
>
> Don't boot.
I am really puzzled. In other words, touching all memory causes the
msgbuf to not hang.
Can you try one more experiment ?
Take the patch below, apply it.
>From the config where interleave is disabled, install new kernel.
Reboot, enter BIOS setup and enable interleave.
Set late_console to zero in loader.
Do not enable memory test.
Boot the patched kernel.
Kernel must hang, according to your previous reports.
I want to see the console log.
diff --git a/sys/kern/subr_msgbuf.c b/sys/kern/subr_msgbuf.c
index f275aef3b4f..1be7a629f65 100644
--- a/sys/kern/subr_msgbuf.c
+++ b/sys/kern/subr_msgbuf.c
@@ -67,14 +67,19 @@ msgbuf_init(struct msgbuf *mbp, void *ptr, int size)
mbp->msg_ptr = ptr;
mbp->msg_size = size;
mbp->msg_seqmod = SEQMOD(size);
+printf("YYY1\n");
msgbuf_clear(mbp);
+printf("YYY2\n");
mbp->msg_magic = MSG_MAGIC;
mbp->msg_lastpri = -1;
mbp->msg_flags = 0;
+printf("YYY3\n");
bzero(&mbp->msg_lock, sizeof(mbp->msg_lock));
mtx_init(&mbp->msg_lock, "msgbuf", NULL, MTX_SPIN);
+printf("YYY4\n");
}
+
/*
* Reinitialize a message buffer, retaining its previous contents if
* the size and checksum are correct. If the old contents cannot be
@@ -85,8 +90,10 @@ msgbuf_reinit(struct msgbuf *mbp, void *ptr, int size)
{
u_int cksum;
- if (mbp->msg_magic != MSG_MAGIC || mbp->msg_size != size) {
+ if (1 || mbp->msg_magic != MSG_MAGIC || mbp->msg_size != size) {
+printf("XXX1\n");
msgbuf_init(mbp, ptr, size);
+printf("XXX2\n");
return;
}
mbp->msg_seqmod = SEQMOD(size);
@@ -117,10 +124,12 @@ void
msgbuf_clear(struct msgbuf *mbp)
{
+printf("ZZZ1\n");
bzero(mbp->msg_ptr, mbp->msg_size);
mbp->msg_wseq = 0;
mbp->msg_rseq = 0;
mbp->msg_cksum = 0;
+printf("ZZZ2\n");
}
/*
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