CURRENT crashes at early boot on Lenovo T540p: rtsx to blame - 13.0-RELEASE crashes same way!
Gary Jennejohn
gljennjohn at gmail.com
Wed May 12 13:34:59 UTC 2021
On Wed, 12 May 2021 15:46:24 +0300
Lev Serebryakov <lev at FreeBSD.org> wrote:
> On 12.05.2021 13:01, Henri Hennebert via freebsd-current wrote:
>
> > It would be fine if you can test the driver with dev.rtsx.0.inversion=1 in loader.conf and see it it solve the problem.
> > the output of
> > sysctl dev.rtsx and
> > kenv | grep smbios.system
> > would be useful
> >
> > BTW is a dummy card inserted in the SD slot?
> >
> > Thank for your time
>
> My T540p:
>
> (1) rtsx in the kernel, enabled in BIOS, no settings in loader.conf, EMPTY SLOT -- panic on boot, typically WITHOUT rtsx in stack trace.
>
> (2) rtsx in the kernel, enabled in BIOS, no settings in loader.conf, SD CARD IN THE SLOT -- no panic on boot, but WiFi card detected
> too late for startup scripts to run wpa_supplicant properly.
>
> (3) rtsx in the kernel, enabled in BIOS, "dev.rtsx.0.inversion=1", SD CARD IN THE SLOT -- no panic on boot, but WiFi card detected
> too late for startup scripts to run wpa_supplicant properly. And card reporting is inverted related to real deal: rtsx0
> reports "Card present" when I remove card and vice versa.
>
> (4) rtsx in the kernel, disabled in BIOS -- device not found, everything (but SD reader) boots & works (as expected!)
>
> (5) rtsx in the kernel, enabled in BIOS, "dev.rtsx.0.inversion=1", EMPTY SLOT -- boots, but prints out "timeout for CMD8/55/1" for very long time and *console*is*not*accessible* till "no compatible cards found on bus".
> ALSO (!) wifi card is found only AFTER all these timeouts, when startup scripts are FAILED to attach to wireless network (!!!).
> ALSO (!) it says "Card Absent" when I *INSERT* card after boot, and "Card present" (+ a lot of timeouts again) when I *REMOVE* card, looks like this "inversion" is wrong for my hardware.
> So, it boots, but practically unusable.
>
> (6) rtsx in the kernel, enabled in BIOS, "dev.rtsx.0.inversion=1", SD CARD IN THE SLOT
>
> (7) rtsx is loaded as module after boot (manually, from console), enabled in BIOS, no setting in loader.conf -- looks to work properly.
> Card could be mounted, read/write, it works.
>
> (9) rtsx is loaded as module after boot (manually, from console), enabled in BIOS, "dev.rtsx.0.inversion=1" -- don't panic, but thinks wrong about card state (Card Present/Absent is inverted, as instructed).
>
> My theory: rtsx detect/attach code has some race conditions / incompatibilities for multi-core boot when card is not present, and it thrash kernel memory and/or block something on boot. "inversion" removes this bad behavior due to waiting for card commands (as with "inversion" it thinks card is here and try to access it).
>
> See (2), (3) and (4) -- when rtsx doesn't cause panic on boot, it still mangle other devices detection & initialization.
>
> I could provide any additional information. Unfortunately, memory dump of panic-on-boot is impossible :-(
>
Is sysctl debug.debugger_on_panic set to 1? You should automatically
land in ddb if that is set. I suppose it is, since you posted some
back trace in an earlier mail. It also seems to be the default, at
least in my FreeBSD-14 kernel.
AFAIK ddb has a command to generate a crash dump. But I can't easily
check that :(
It seems like there's a major bug when no SD card is inserted and the
driver is in the kernel. And a timing problem when a card is in the
slot at boot time.
Good to know that the module still works.
Difficult to debug without your laptop model in the hands of a developer.
--
Gary Jennejohn
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