> On 22 Mar 2022, at 18:19, John David Anglin <dave.anglin@xxxxxxxx> wrote: > > On 2022-03-22 1:52 p.m., Sam James wrote: >> Hi all, >> >> In Gentoo, we've just got our hands on an RP3440 (PA8800) which seems to quite easily hit inequivalent aliasing issues. >> >> We've found that under some workloads, the machine copes fine, none of that appears in dmesg, and all is well - even for >> over a week. But as soon as we start other workloads (the problematic one is building "stages" -- release media for Gentoo), >> within 30m or so, the machine is in a broken state, with these messages flooding dmesg: >> ``` >> Mar 22 04:19:55 muta.hppa.dev.gentoo.org kernel: INEQUIVALENT ALIASES 0x42994000 and 0x426e1000 in file bash >> Mar 22 04:19:55 muta.hppa.dev.gentoo.org kernel: INEQUIVALENT ALIASES 0x426e1000 and 0x41b56000 in file bash >> Mar 22 04:19:55 muta.hppa.dev.gentoo.org kernel: INEQUIVALENT ALIASES 0x41b56000 and 0x41aae000 in file bash >> Mar 22 04:19:55 muta.hppa.dev.gentoo.org kernel: INEQUIVALENT ALIASES 0x41aae000 and 0x42774000 in file bash >> Mar 22 04:19:55 muta.hppa.dev.gentoo.org kernel: INEQUIVALENT ALIASES 0x42774000 and 0x41202000 in file bash >> Mar 22 04:19:55 muta.hppa.dev.gentoo.org kernel: INEQUIVALENT ALIASES 0x41202000 and 0x428dd000 in file bash >> Mar 22 04:19:55 muta.hppa.dev.gentoo.org kernel: INEQUIVALENT ALIASES 0x41e2c000 and 0x418f6000 in file bash >> Mar 22 04:19:55 muta.hppa.dev.gentoo.org kernel: INEQUIVALENT ALIASES 0x418f6000 and 0x42980000 in file bash >> Mar 22 04:19:55 muta.hppa.dev.gentoo.org kernel: INEQUIVALENT ALIASES 0x42980000 and 0x426cd000 in file bash >> Mar 22 04:19:55 muta.hppa.dev.gentoo.org kernel: INEQUIVALENT ALIASES 0x426cd000 and 0x41b42000 in file bash >> Mar 22 04:19:55 muta.hppa.dev.gentoo.org kernel: INEQUIVALENT ALIASES 0x41b42000 and 0x41a9a000 in file bash >> Mar 22 04:19:55 muta.hppa.dev.gentoo.org kernel: INEQUIVALENT ALIASES 0x41a9a000 and 0x42760000 in file bash >> Mar 22 04:19:55 muta.hppa.dev.gentoo.org kernel: INEQUIVALENT ALIASES 0x42760000 and 0x411ee000 in file bash >> Mar 22 04:19:55 muta.hppa.dev.gentoo.org kernel: INEQUIVALENT ALIASES 0x411ee000 and 0x428c9000 in file bash > I don't think this is new. There are no changes to the code that detects INEQUIVALENT ALIASES in the latest pull. > Sorry, to be clear: I wasn't trying to suggest the issue is new -- just saying that we've been trying 5.10, 5.15+ to see if latest changes helped at all, but they haven't. In our experience so far, there has been no good kernel version for us on this hardware. > I've seen this before but it's not occurring in my current builds for rp3440 and c8000. I've been running for-next > changes on c8000 for several weeks. > Yeah, I haven't seen this at all on my C8000 (or Gentoo's other HW, a C3600). > I suspect a problem with shmat but I'm not sure. >> [snip] best, sam
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