On Tue, Dec 13, 2016 at 03:57:59PM +0200, Konstantin Belousov wrote: > 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. yes > 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. Hmm. I am [already] show output from ddb, and guess kernel will be hang at first wirte to *mbp, i.e. you don't see any in console log. OK, anyway I am try this pacth. > 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"); > } > > /*Received on Tue Dec 13 2016 - 13:11:18 UTC
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