Re: Enabling NUMA in BIOS stop booting FreeBSD

On Tue, Dec 13, 2016 at 06:28:38PM +0300, Slawa Olhovchenkov wrote:
> On Tue, Dec 13, 2016 at 05:01:39PM +0200, Konstantin Belousov wrote:
> KDB: debugger backends: ddb
> KDB: current backend: ddb
> SMAP type=01 base=0000000000000000 len=0000000000099c00
> SMAP type=02 base=0000000000099c00 len=0000000000006400
> SMAP type=02 base=00000000000e0000 len=0000000000020000
> SMAP type=01 base=0000000000100000 len=000000007906b000
> SMAP type=02 base=000000007916b000 len=0000000000936000
> SMAP type=04 base=0000000079aa1000 len=0000000000509000
> SMAP type=02 base=0000000079faa000 len=0000000002056000
> SMAP type=01 base=0000000100000000 len=0000001f80000000
> SMAP type=02 base=000000007c000000 len=0000000014000000
> SMAP type=02 base=00000000fed1c000 len=0000000000029000
> SMAP type=02 base=00000000ff000000 len=0000000001000000
> TTT1 0xfffff8207ff00000 0xfffff8207fffffb8 100000
This is not what I expected.
Also, I realized that I mis-read the memory test code.  It does not
obliterate memory, old content is preserved.

Please do exactly the same testing with another patch, at the end of the
message.  There could be more output, up to 256 lines.

> 
> > If the patched kernel boots succesfully, or if the patched kernel
> > boots further, I will provide one more, last patch, to test.
> 
> please, next time point what verion of source need to patch: vanila or
> already patched.
I usually send full patches, i.e. the patch must be applied to the clean
checkout.  Patch the vanilla sources.

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
_at__at_ -67,14 +67,19 _at__at_ 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
_at__at_ -85,8 +90,10 _at__at_ 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);
_at__at_ -117,10 +124,12 _at__at_ 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");
 }
 
 /*
diff --git a/sys/kern/subr_prf.c b/sys/kern/subr_prf.c
index e78863830c7..a72984dbc19 100644
--- a/sys/kern/subr_prf.c
+++ b/sys/kern/subr_prf.c
_at__at_ -998,6 +998,14 _at__at_ msgbufinit(void *ptr, int size)
 	char *cp;
 	static struct msgbuf *oldp = NULL;
 
+printf("TTT1 %p %p %x\n", ptr, (char *)ptr + size - sizeof(*msgbufp), size);
+for (int i = 0; i < size; i++) {
+if (i % PAGE_SIZE == 0) printf(". %x\n", i);
+	volatile char *c = (char *)ptr + i;
+	char tmp;
+	tmp = *c;
+	*c = tmp;
+}
 	size -= sizeof(*msgbufp);
 	cp = (char *)ptr;
 	msgbufp = (struct msgbuf *)(cp + size);