Re: X stopped working with 5.14 on iBook
On 10/8/21 11:10 AM, John Paul Adrian Glaubitz wrote:
> Hi Stan!
>
> On 10/8/21 18:49, Stan Johnson wrote:
>> ...
>> $ ls -l vmlinux
>> -rwxr-xr-x 1 johnson johnson 208626696 Oct 8 09:03 vmlinux
> ...
> That is the unstripped, uncompressed image. You can either strip this image:
>
> glaubitz@node54:/data/home/glaubitz/linux> ls -lh vmlinux
> -rwxr-xr-x 1 glaubitz users 274M Oct 8 17:09 vmlinux
> glaubitz@node54:/data/home/glaubitz/linux> strip vmlinux
> glaubitz@node54:/data/home/glaubitz/linux> ls -lh vmlinux
> -rwxr-xr-x 1 glaubitz users 27M Oct 8 17:09 vmlinux
> glaubitz@node54:/data/home/glaubitz/linux>
thanks, stripping vmlinux was the step I was missing.
Starting with the kernel source linux-source-5.14.tar.xz installed from
"apt-get install linux-source",
Test 1) Compile using config-5.14.0-2
X fails as before; everything else seems to work. This confirms the
problem with the Debian stock kernel vmlinux-5.14.0-2-powerpc.
Test 2) Compile using config-5.10.0-8
Since the Debian default kernel vmlinux-5.10.0-8-powerpc works, I
expected compiling using config-5.10.0-8 would also work, but the kernel
fails while mounting filesystems with these errors, after successfully
checking the rootfs:
ext4: Unknown symbol utf8_strncasecmp_folded (err -2)
ext4: Unknown symbol utf8_load (err -r)
ext4: Unknown symbol utf8_casefold (err -2)
ext4: Unknown symbol utf8_strncasecup (err -2)
ext4: Unknown symbol utf8_validate (err -2)
ext4: Unknown symbol utf8_unload (err -2)
At this point, the system drops to a busybox shell.
So these two tests were inconclusive, other than suggesting that
config-5.14.0-2 may have one or more options that possibly hit a kernel
regression.
Next, I plan to tweak config-5.14.0-2 so I can boot vmlinux without
having to compile or install any modules. The current test process is
too slow -- it only takes a few minutes to cross-compile the kernel, but
it takes almost two hours to cross-compile all of the modules, and the
build directory ends up being 10 GB.
We also know that dot-config-powermac-5.13 works with 5.14.0-2, but it
likely doesn't have the option(s) selected that are needed to hit the
regression.
Next, I'll use git bisect to look for a regression somewhere after
mainline v5.15, but I may have to go back to v5.13 or v5.14. At this
point, my guess is that Debian selected one or more options that hit a
kernel regression, much like the KUAP/KUEP regressions that were seen in
v5.13 on the Wallstreet and PB 3400.
Here's a diff of config-5.10.0-8-powerpc and config-5.14.0-2-powerpc,
after stripping out the comments:
$ fgrep -v \# config-5.10.0-8-powerpc > t1
$ fgrep -v \# config-5.14.0-2-powerpc > t2
$ diff t1 t2
1c1
< CONFIG_CC_VERSION_TEXT="gcc-10 (Debian 10.2.1-6) 10.2.1 20210110"
---
> CONFIG_CC_VERSION_TEXT="gcc-10 (Debian 10.3.0-11) 10.3.0"
3,4c3
< CONFIG_GCC_VERSION=100201
< CONFIG_LD_VERSION=235020000
---
> CONFIG_GCC_VERSION=100300
5a5,8
> CONFIG_AS_IS_GNU=y
> CONFIG_AS_VERSION=23700
> CONFIG_LD_IS_BFD=y
> CONFIG_LD_VERSION=23700
10a14
> CONFIG_CC_HAS_NO_PROFILE_FN_ATTR=y
18d21
< CONFIG_BUILD_SALT="5.10.0-8-powerpc"
52a56,63
> CONFIG_BPF=y
> CONFIG_HAVE_EBPF_JIT=y
>
> CONFIG_BPF_SYSCALL=y
> CONFIG_BPF_JIT=y
> CONFIG_BPF_UNPRIV_DEFAULT_OFF=y
> CONFIG_BPF_LSM=y
>
92a104
> CONFIG_CGROUP_MISC=y
95a108
> CONFIG_TIME_NS=y
118d130
< CONFIG_BPF=y
144,145d155
< CONFIG_BPF_LSM=y
< CONFIG_BPF_SYSCALL=y
166d175
< CONFIG_PPC_BOOK3S_32=y
168c177,179
< CONFIG_PPC_BOOK3S_6xx=y
---
> CONFIG_PPC_BOOK3S_32=y
> CONFIG_PPC_BOOK3S_603=y
> CONFIG_PPC_BOOK3S_604=y
170a182
> CONFIG_PPC_FPU_REGS=y
178a191
> CONFIG_NR_CPUS=1
200a214
> CONFIG_GENERIC_BUG_RELATIVE_POINTERS=y
203d216
< CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y
205d217
< CONFIG_ZONE_DMA=y
247,248d258
< CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
< CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE=y
285c295
< CONFIG_TASK_SIZE=0xc0000000
---
> CONFIG_TASK_SIZE=0xb0000000
292,293d301
< CONFIG_OPROFILE=m
< CONFIG_HAVE_OPROFILE=y
295a304
> CONFIG_OPTPROBES=y
302a312
> CONFIG_HAVE_OPTPROBES=y
308a319
> CONFIG_ARCH_HAS_SET_MEMORY=y
316a328
> CONFIG_HAVE_ARCH_JUMP_LABEL_RELATIVE=y
330a343
> CONFIG_LTO_NONE=y
335a349
> CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK=y
338a353
> CONFIG_HAVE_RELIABLE_STACKTRACE=y
347a363
> CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y
364a381,382
> CONFIG_MODULE_COMPRESS_NONE=y
> CONFIG_MODPROBE_PATH="/sbin/modprobe"
377d394
< CONFIG_BLK_CGROUP_IOCOST=y
378a396
> CONFIG_BLK_CGROUP_IOCOST=y
418d435
< CONFIG_FLAT_NODE_MEM_MAP=y
420a438,439
> CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
> CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE=y
443a463
> CONFIG_ZONE_DMA=y
445d464
< CONFIG_FRAME_VECTOR=y
446a466
> CONFIG_KMAP_LOCAL=y
557a578,580
> CONFIG_MPTCP=y
> CONFIG_INET_MPTCP_DIAG=m
> CONFIG_MPTCP_IPV6=y
573,574c596
< CONFIG_NF_LOG_COMMON=m
< CONFIG_NF_LOG_NETDEV=m
---
> CONFIG_NF_LOG_SYSLOG=m
854d875
< CONFIG_NF_LOG_BRIDGE=m
913d933
< CONFIG_HAVE_NET_DSA=y
1034a1055
> CONFIG_BATMAN_ADV_BATMAN_V=y
1039d1059
< CONFIG_BATMAN_ADV_DEBUGFS=y
1063d1082
< CONFIG_BPF_JIT=y
1202,1203d1220
< CONFIG_WIMAX=m
< CONFIG_WIMAX_DEBUG_LEVEL=8
1224a1242
> CONFIG_NET_SELFTESTS=m
1230d1247
< CONFIG_HAVE_CBPF_JIT=y
1276a1294
> CONFIG_AUXILIARY_BUS=y
1291a1310
> CONFIG_REGMAP_MMIO=m
1325a1345,1346
> CONFIG_ZRAM_DEF_COMP_LZORLE=y
> CONFIG_ZRAM_DEF_COMP="lzo-rle"
1328d1348
< CONFIG_BLK_DEV_UMEM=m
1393,1394d1412
< CONFIG_HAVE_IDE=y
<
1717,1718d1734
<
<
1740a1757
> CONFIG_AQTION=m
1830a1848
> CONFIG_NET_VENDOR_MICROSOFT=y
1850a1869
> CONFIG_MLX5_BRIDGE=y
1851a1871
> CONFIG_MLX5_TC_SAMPLE=y
1956a1977
> CONFIG_AX88796B_PHY=m
1986a2008
> CONFIG_FWNODE_MDIO=m
2183a2206
> CONFIG_MT76_CONNAC_LIB=m
2189a2213,2218
> CONFIG_MT7615_COMMON=m
> CONFIG_MT7615E=m
> CONFIG_MT7663_USB_SDIO_COMMON=m
> CONFIG_MT7663U=m
> CONFIG_MT7915E=m
> CONFIG_MT7921E=m
2264,2268d2292
<
< CONFIG_WIMAX_I2400M=m
< CONFIG_WIMAX_I2400M_USB=m
< CONFIG_WIMAX_I2400M_DEBUG_LEVEL=8
<
2280,2281d2303
< CONFIG_DLCI=m
< CONFIG_DLCI_MAX=8
2289a2312,2313
>
>
2382d2405
< CONFIG_TABLET_USB_GTCO=m
2388d2410
< CONFIG_TOUCHSCREEN_PROPERTIES=y
2532a2555,2558
> CONFIG_TCG_TPM=y
> CONFIG_TCG_TIS_CORE=m
> CONFIG_TCG_TIS_SPI=m
> CONFIG_TCG_VTPM_PROXY=m
2609a2636
>
2806a2834
> CONFIG_MEDIA_CEC_RC=y
2829a2858
> CONFIG_V4L2_ASYNC=m
2842d2870
< CONFIG_TTPCI_EEPROM=m
3013,3015d3040
< CONFIG_DVB_AV7110_IR=y
< CONFIG_DVB_AV7110=m
< CONFIG_DVB_AV7110_OSD=y
3020d3044
< CONFIG_DVB_BUDGET_PATCH=m
3048a3073
> CONFIG_TTPCI_EEPROM=m
3220d3244
< CONFIG_DVB_SP8870=m
3265a3290
> CONFIG_DVB_MXL692=m
3307d3331
< CONFIG_DRM_KMS_FB_HELPER=y
3443a3468
> CONFIG_SND_CTL_LED=m
3627a3653
> CONFIG_HID_CREATIVE_SB0540=m
3635a3662
> CONFIG_HID_FT260=m
3637a3665
> CONFIG_HID_GLORIOUS=m
3639a3668
> CONFIG_HID_VIVALDI=m
3681a3711,3712
> CONFIG_HID_PLAYSTATION=m
> CONFIG_PLAYSTATION_FF=y
3686a3718
> CONFIG_HID_SEMITEK=m
3713a3746
> CONFIG_HID_MCP2221=m
3830d3862
< CONFIG_USB_SERIAL_XIRCOM=m
3913a3946
>
3957d3989
< CONFIG_INFINIBAND_I40IW=m
4011a4044
> CONFIG_VIRTIO_PCI_LIB=m
4043,4044d4075
<
<
4047d4077
< CONFIG_CLKDEV_LOOKUP=y
4050a4081,4082
>
>
4187a4220
>
4193a4227
>
4459a4494
> CONFIG_F2FS_FS_LZ4HC=y
4491a4527
> CONFIG_NETFS_SUPPORT=m
4560d4595
< CONFIG_EROFS_FS_CLUSTER_PAGE_LIMIT=1
4591a4627
> CONFIG_NFS_V4_2_SSC_HELPER=y
4602a4639
> CONFIG_CIFS_STATS2=y
4670a4708
> CONFIG_UNICODE=y
4674a4713
> CONFIG_ENCRYPTED_KEYS=y
4703a4743
> CONFIG_SECURITY_LANDLOCK=y
4706a4747
> CONFIG_INTEGRITY_TRUSTED_KEYRING=y
4708a4750,4763
> CONFIG_IMA=y
> CONFIG_IMA_MEASURE_PCR_IDX=10
> CONFIG_IMA_LSM_RULES=y
> CONFIG_IMA_SIG_TEMPLATE=y
> CONFIG_IMA_DEFAULT_TEMPLATE="ima-sig"
> CONFIG_IMA_DEFAULT_HASH_SHA256=y
> CONFIG_IMA_DEFAULT_HASH="sha256"
> CONFIG_IMA_APPRAISE=y
> CONFIG_IMA_APPRAISE_BOOTPARAM=y
> CONFIG_IMA_TRUSTED_KEYRING=y
> CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS=y
> CONFIG_IMA_QUEUE_EARLY_BOOT_KEYS=y
> CONFIG_EVM=y
> CONFIG_EVM_ATTR_FSUUID=y
4733c4788
< CONFIG_CRYPTO_RNG=m
---
> CONFIG_CRYPTO_RNG=y
4765c4820
< CONFIG_CRYPTO_CBC=m
---
> CONFIG_CRYPTO_CBC=y
4795d4849
< CONFIG_CRYPTO_RMD128=m
4797,4798d4850
< CONFIG_CRYPTO_RMD256=m
< CONFIG_CRYPTO_RMD320=m
4805d4856
< CONFIG_CRYPTO_TGR192=m
4808c4859
< CONFIG_CRYPTO_AES=m
---
> CONFIG_CRYPTO_AES=y
4818d4868
< CONFIG_CRYPTO_SALSA20=m
4844c4894
< CONFIG_CRYPTO_LIB_AES=m
---
> CONFIG_CRYPTO_LIB_AES=y
4869d4918
< CONFIG_MODULE_SIG_KEY=""
4871d4919
< CONFIG_SYSTEM_TRUSTED_KEYS="debian/certs/debian-uefi-certs.pem"
4902c4950
< CONFIG_LZ4_COMPRESS=y
---
> CONFIG_LZ4_COMPRESS=m
4905c4953
< CONFIG_ZSTD_COMPRESS=y
---
> CONFIG_ZSTD_COMPRESS=m
4943a4992,4994
> CONFIG_HAVE_GENERIC_VDSO=y
> CONFIG_GENERIC_GETTIMEOFDAY=y
> CONFIG_GENERIC_VDSO_TIME_NS=y
4952a5004
> CONFIG_ARCH_STACKWALK=y
4968c5020,5021
< CONFIG_ENABLE_MUST_CHECK=y
---
> CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
> CONFIG_PAHOLE_HAS_SPLIT_BTF=y
4987d5039
< CONFIG_PAGE_POISONING_NO_SANITY=y
4989a5042
> CONFIG_ARCH_HAS_DEBUG_VM_PGTABLE=y
4996a5050
> CONFIG_HAVE_ARCH_KFENCE=y
5033d5086
< CONFIG_RING_BUFFER_ALLOW_SWAP=y
5051a5105
> CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT=y
5074a5129
> CONFIG_ARCH_USE_MEMTEST=y
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