On 2022-04-05 5:13 p.m., John David Anglin wrote:
On 2022-03-22 1:52 p.m., Sam James wrote:
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
```
It seems all these messages result from a single call to flush_dcache_page. Note the sequential behavior of old_addr
and addr, and message times.
I had some messages from systemd:
[ 1738.323997] INEQUIVALENT ALIASES 0x42190000 and 0x4222d000 in file systemd
[ 1738.361116] INEQUIVALENT ALIASES 0x42186000 and 0x42223000 in file systemd
[ 1738.373668] INEQUIVALENT ALIASES 0x4218d000 and 0x4222a000 in file systemd
[ 1738.379494] INEQUIVALENT ALIASES 0x4217f000 and 0x4221c000 in file systemd
[ 1738.392740] INEQUIVALENT ALIASES 0x4217c000 and 0x42219000 in file systemd
[ 1738.394909] INEQUIVALENT ALIASES 0x42199000 and 0x42236000 in file systemd
root@hiauly6:/proc/892# cat maps
42219000-423a2000 r-xp 00000000 08:15 8918492 /lib/systemd/systemd
423a2000-423c7000 r--p 00189000 08:15 8918492 /lib/systemd/systemd
423c7000-423d3000 rwxp 001ae000 08:15 8918492 /lib/systemd/systemd
42523000-4259b000 rwxp 00000000 00:00 0 [heap]
f0bfa000-f0c20000 r-xp 00000000 08:15 8913804 /lib/hppa-linux-gnu/libgpg-error.so.0.32.1
f0c20000-f0c21000 rwxp 00026000 08:15 8913804 /lib/hppa-linux-gnu/libgpg-error.so.0.32.1
f0ffa000-f0fff000 r-xp 00000000 08:15 16780132 /usr/lib/hppa-linux-gnu/libattr.so.1.1.2501
f0fff000-f1000000 rwxp 00005000 08:15 16780132 /usr/lib/hppa-linux-gnu/libattr.so.1.1.2501
f13fa000-f1656000 r-xp 00000000 08:15 16782647 /usr/lib/hppa-linux-gnu/libcrypto.so.1.1
f1656000-f1677000 rwxp 0025c000 08:15 16782647 /usr/lib/hppa-linux-gnu/libcrypto.so.1.1
f1677000-f167b000 rwxp 00000000 00:00 0
f17fa000-f17ff000 r-xp 00000000 08:15 8912981 /lib/hppa-linux-gnu/libcap-ng.so.0.0.0
f17ff000-f1800000 r--p 00005000 08:15 8912981 /lib/hppa-linux-gnu/libcap-ng.so.0.0.0
f1800000-f1801000 rwxp 00006000 08:15 8912981 /lib/hppa-linux-gnu/libcap-ng.so.0.0.0
f1bfa000-f1c55000 r-xp 00000000 08:15 16782725 /usr/lib/hppa-linux-gnu/libpcre2-8.so.0.10.4
f1c55000-f1c56000 rwxp 0005b000 08:15 16782725 /usr/lib/hppa-linux-gnu/libpcre2-8.so.0.10.4
f1ffa000-f206f000 r-xp 00000000 08:15 8913179 /lib/hppa-linux-gnu/libm-2.33.so
f206f000-f2070000 r--p 00075000 08:15 8913179 /lib/hppa-linux-gnu/libm-2.33.so
f2070000-f2073000 rwxp 00076000 08:15 8913179 /lib/hppa-linux-gnu/libm-2.33.so
f23fa000-f2423000 r-xp 00000000 08:15 8913216 /lib/hppa-linux-gnu/liblzma.so.5.2.5
f2423000-f2424000 rwxp 00029000 08:15 8913216 /lib/hppa-linux-gnu/liblzma.so.5.2.5
f27fa000-f28d4000 r-xp 00000000 08:15 16780194 /usr/lib/hppa-linux-gnu/libzstd.so.1.5.2
f28d4000-f28d6000 rwxp 000da000 08:15 16780194 /usr/lib/hppa-linux-gnu/libzstd.so.1.5.2
f2bfa000-f2c26000 r-xp 00000000 08:15 16783170 /usr/lib/hppa-linux-gnu/liblz4.so.1.9.3
f2c26000-f2c27000 rwxp 0002c000 08:15 16783170 /usr/lib/hppa-linux-gnu/liblz4.so.1.9.3
f2ffa000-f3001000 r-xp 00000000 08:15 16778902 /usr/lib/hppa-linux-gnu/libip4tc.so.2.0.0
f3001000-f3002000 rwxp 00007000 08:15 16778902 /usr/lib/hppa-linux-gnu/libip4tc.so.2.0.0
f33fa000-f350a000 r-xp 00000000 08:15 16778210 /usr/lib/hppa-linux-gnu/libgcrypt.so.20.4.1
f350a000-f3513000 rwxp 00110000 08:15 16778210 /usr/lib/hppa-linux-gnu/libgcrypt.so.20.4.1
f383d000-f3840000 r-xp 00000000 08:15 8913141 /lib/hppa-linux-gnu/libdl-2.33.so
f3840000-f3841000 r--p 00003000 08:15 8913141 /lib/hppa-linux-gnu/libdl-2.33.so
f3841000-f3842000 rwxp 00004000 08:15 8913141 /lib/hppa-linux-gnu/libdl-2.33.so
f3c3d000-f3c79000 r-xp 00000000 08:15 8913327 /lib/hppa-linux-gnu/libcrypt.so.1.1.0
f3c79000-f3c7a000 r--p 0003c000 08:15 8913327 /lib/hppa-linux-gnu/libcrypt.so.1.1.0
f3c7a000-f3c7b000 rwxp 0003d000 08:15 8913327 /lib/hppa-linux-gnu/libcrypt.so.1.1.0
f3c7b000-f3c83000 rwxp 00000000 00:00 0
f403d000-f4045000 r-xp 00000000 08:15 8913225 /lib/hppa-linux-gnu/libcap.so.2.44
f4045000-f4046000 rwxp 00008000 08:15 8913225 /lib/hppa-linux-gnu/libcap.so.2.44
f443d000-f449a000 r-xp 00000000 08:15 16777505 /usr/lib/hppa-linux-gnu/libblkid.so.1.1.0
f449a000-f449f000 rwxp 0005d000 08:15 16777505 /usr/lib/hppa-linux-gnu/libblkid.so.1.1.0
f483d000-f4846000 r-xp 00000000 08:15 16777796 /usr/lib/hppa-linux-gnu/libacl.so.1.1.2301
f4846000-f4847000 rwxp 00009000 08:15 16777796 /usr/lib/hppa-linux-gnu/libacl.so.1.1.2301
f4c3d000-f4dc1000 r-xp 00000000 08:15 8913099 /lib/hppa-linux-gnu/libc-2.33.so
f4dc1000-f4dc3000 r--p 00184000 08:15 8913099 /lib/hppa-linux-gnu/libc-2.33.so
f4dc3000-f4dc8000 rwxp 00186000 08:15 8913099 /lib/hppa-linux-gnu/libc-2.33.so
f4dc8000-f4dcf000 rwxp 00000000 00:00 0
f503d000-f505e000 r-xp 00000000 08:15 8913780 /lib/hppa-linux-gnu/libpthread-2.33.so
f505e000-f505f000 r--p 00021000 08:15 8913780 /lib/hppa-linux-gnu/libpthread-2.33.so
f505f000-f5060000 rwxp 00022000 08:15 8913780 /lib/hppa-linux-gnu/libpthread-2.33.so
f5060000-f5062000 rwxp 00000000 00:00 0
f543d000-f5452000 r-xp 00000000 08:15 16780912 /usr/lib/hppa-linux-gnu/libapparmor.so.1.8.2
f5452000-f5453000 rwxp 00015000 08:15 16780912 /usr/lib/hppa-linux-gnu/libapparmor.so.1.8.2
f583d000-f5858000 r-xp 00000000 08:15 16778597 /usr/lib/hppa-linux-gnu/libkmod.so.2.3.7
f5858000-f5859000 rwxp 0001b000 08:15 16778597 /usr/lib/hppa-linux-gnu/libkmod.so.2.3.7
f5c3d000-f5c5c000 r-xp 00000000 08:15 8913043 /lib/hppa-linux-gnu/libaudit.so.1.0.0
f5c5c000-f5c5d000 r--p 0001f000 08:15 8913043 /lib/hppa-linux-gnu/libaudit.so.1.0.0
f5c5d000-f5c5e000 rwxp 00020000 08:15 8913043 /lib/hppa-linux-gnu/libaudit.so.1.0.0
f5c5e000-f5c6e000 rwxp 00000000 00:00 0
f603d000-f604c000 r-xp 00000000 08:15 8913380 /lib/hppa-linux-gnu/libpam.so.0.85.1
f604c000-f604d000 rwxp 0000f000 08:15 8913380 /lib/hppa-linux-gnu/libpam.so.0.85.1
f643d000-f64a5000 r-xp 00000000 08:15 16777988 /usr/lib/hppa-linux-gnu/libmount.so.1.1.0
f64a5000-f64a9000 rwxp 00068000 08:15 16777988 /usr/lib/hppa-linux-gnu/libmount.so.1.1.0
f67fa000-f6828000 r-xp 00000000 08:15 8913119 /lib/hppa-linux-gnu/libselinux.so.1
f6828000-f6829000 r--p 0002e000 08:15 8913119 /lib/hppa-linux-gnu/libselinux.so.1
f6829000-f682b000 rwxp 0002f000 08:15 8913119 /lib/hppa-linux-gnu/libselinux.so.1
f682b000-f682c000 rwxp 00000000 00:00 0
f6bfa000-f6c02000 r-xp 00000000 08:15 8913828 /lib/hppa-linux-gnu/librt-2.33.so
f6c02000-f6c03000 r--p 00008000 08:15 8913828 /lib/hppa-linux-gnu/librt-2.33.so
f6c03000-f6c04000 rwxp 00009000 08:15 8913828 /lib/hppa-linux-gnu/librt-2.33.so
f73fa000-f76f3000 r-xp 00000000 08:15 8913458 /lib/systemd/libsystemd-shared-250.so
f76f3000-f76ff000 r--p 002f9000 08:15 8913458 /lib/systemd/libsystemd-shared-250.so
f76ff000-f7714000 rwxp 00305000 08:15 8913458 /lib/systemd/libsystemd-shared-250.so
f7714000-f7715000 rwxp 00000000 00:00 0
f77fa000-f7828000 r-xp 00000000 08:15 8912944 /lib/hppa-linux-gnu/ld-2.33.so
f7828000-f7829000 r--p 0002e000 08:15 8912944 /lib/hppa-linux-gnu/ld-2.33.so
f7829000-f782d000 rwxp 0002f000 08:15 8912944 /lib/hppa-linux-gnu/ld-2.33.so
f7ae5000-f7afb000 rw-p 00000000 00:00 0
f7afb000-f7afc000 r-xp 00000000 00:00 0 [vdso]
f7afc000-f7b01000 rw-p 00000000 00:00 0
f922e000-f9250000 rwxp 00000000 00:00 0 [stack]
All the messages are associated with the mapping of the text section in the first region.
Dave
--
John David Anglin dave.anglin@xxxxxxxx
