Date: Tue, 25 Oct 2005 10:24:35 GMT From: Jacques Caron <jc@oxado.com> To: freebsd-gnats-submit@FreeBSD.org Subject: amd64/87977: amd64 busdma dflt_lock called (by ata) if physmem>4G Message-ID: <200510251024.j9PAOZ65021884@www.freebsd.org> Resent-Message-ID: <200510251030.j9PAUFfU068811@freefall.freebsd.org>
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>Number: 87977
>Category: amd64
>Synopsis: amd64 busdma dflt_lock called (by ata) if physmem>4G
>Confidential: no
>Severity: critical
>Priority: high
>Responsible: freebsd-amd64
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Oct 25 10:30:15 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator: Jacques Caron
>Release: 5.4
>Organization:
Oxado
>Environment:
FreeBSD db4.fr1.oxado.com 5.4-RELEASE FreeBSD 5.4-RELEASE #0: Thu Oct 20 23:46:49 UTC 2005 root@artemis.oxado.com:/usr/obj/usr/src/sys/SMP amd64
>Description:
FreeBSD/amd64 5.4-RELEASE on Tyan K8SD Pro (S2882D) with two Opteron processors and 8 GB RAM, on-board SiI 3114 SATA controller and additional Promise SATA300TX4 SATA controller.
5.4-RELEASE was patched to add support for the Promise controller:
diff -c sys/dev/ata/ata-chipset.c.orig sys/dev/ata/ata-chipset.c
*** sys/dev/ata/ata-chipset.c.orig Wed May 11 17:15:35 2005
--- sys/dev/ata/ata-chipset.c Fri Sep 2 16:19:05 2005
***************
*** 1312,1317 ****
--- 1312,1320 ----
{ ATA_PDC20621, 0, PRMIO, PRSX4X, ATA_UDMA5, "Promise PDC20621" },
{ ATA_PDC20622, 0, PRMIO, PRSX4X, ATA_SA150, "Promise PDC20622" },
{ ATA_PDC40518, 0, PRMIO, PRSATA2, ATA_SA150, "Promise PDC40518" },
+ { ATA_PDC40519, 0, PRMIO, PRSATA2, ATA_SA150, "Promise PDC40519" },
+ { ATA_PDC40718, 0, PRMIO, PRSATA2, ATA_SA150, "Promise PDC40718" },
+ { ATA_PDC40719, 0, PRMIO, PRSATA2, ATA_SA150, "Promise PDC40719" },
{ 0, 0, 0, 0, 0, 0}};
char buffer[64];
uintptr_t devid = 0;
diff -c sys/dev/ata/ata-pci.h.orig sys/dev/ata/ata-pci.h
*** sys/dev/ata/ata-pci.h.orig Wed May 11 17:15:35 2005
--- sys/dev/ata/ata-pci.h Fri Sep 2 16:19:56 2005
***************
*** 180,185 ****
--- 180,188 ----
#define ATA_PDC20579 0x3574105a
#define ATA_PDC20580 0x3570105a
#define ATA_PDC40518 0x3d18105a
+ #define ATA_PDC40519 0x3519105a
+ #define ATA_PDC40718 0x3d17105a
+ #define ATA_PDC40719 0x3515105a
#define ATA_PDC20617 0x6617105a
#define ATA_PDC20618 0x6626105a
#define ATA_PDC20619 0x6629105a
Any kind of serious I/O involving several of the Promise-based disks or a combination of the Promise-based disks and the SiI-based ones will cause a panic "busdma dflt_lock called".
Any level of I/O on the SiI only apparently never causes the problem.
Setting hw.physmem=3g in /boot/loader.conf apparently makes the problem go away, but I need the additional memory...
Similar issues with other drivers are found here:
http://www.monkey.org/freebsd/archive/freebsd-amd64/200411/msg00070.html
and possibly here:
http://www.mail-archive.com/freebsd-hardware@freebsd.org/msg00536.html
It seems the issue is either in the busdma code, or the way the busdma code is used by those drivers.
As an aside, fxp has a long delay during boot with 8G, but this goes away when hw.physmem is set to 3g.
>How-To-Repeat:
amd64 with 8G RAM and 4 disks on a Promise SATA300TX4,
dd of=/dev/null if=/dev/ad12 bs=256000 &
dd of=/dev/null if=/dev/ad14 bs=256000 &
dd of=/dev/null if=/dev/ad16 bs=256000 &
dd of=/dev/null if=/dev/ad18 bs=256000 &
You will never get to the last one.
>Fix:
Workaround (not fix): set hw.physmem to less than 4G.
>Release-Note:
>Audit-Trail:
>Unformatted:
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