Date: Sun, 10 Feb 2008 07:10:02 GMT From: masatic@mbs.sphere.ne.jp (FUCHIGAMI Masachika) To: freebsd-amd64@FreeBSD.org Subject: Re: amd64/120202: [panic] kernel panic at start_all_aps, AP not starts Message-ID: <200802100710.m1A7A2tI074762@freefall.freebsd.org>
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The following reply was made to PR amd64/120202; it has been noted by GNATS. From: masatic@mbs.sphere.ne.jp (FUCHIGAMI Masachika) To: bug-followup@FreeBSD.org Cc: Subject: Re: amd64/120202: [panic] kernel panic at start_all_aps, AP not starts Date: Sun, 10 Feb 2008 16:04:04 +0900 I found following patch works well. IMHO, AP does not accept SIPI because the core shutdowns or send SIPI to itself in BIOS bootup code. So, i modify the code to send SIPI before AP closes its ears. -- *** mp_machdep.c.orig Mon Oct 8 21:51:01 2007 --- mp_machdep.c Fri Feb 8 22:34:41 2008 *************** *** 788,796 **** --- 788,798 ---- lapic_ipi_raw(APIC_DEST_ALLESELF | APIC_TRIGMOD_LEVEL | APIC_LEVEL_DEASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_INIT, 0); /* wait for pending status end */ + #if 0 DELAY(10000); /* wait ~10mS */ + #endif lapic_ipi_wait(-1); /* * next we do a STARTUP IPI: the previous INIT IPI might still be
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