The following kernel warning noticed on arm KASAN enabled config while booting.
[ 0.000000] Linux version 5.10.0-rc3-next-20201110
(tuxmake@e15fe3b4fdc6) (arm-linux-gnueabihf-gcc (Debian 9.3.0-13)
9.3.0, GNU ld (GNU Binutils for Debian) 2.35.1) #2 SMP Tue Nov 10
07:49:47 UTC 2020
[ 0.000000] CPU: ARMv7 Processor [410fd034] revision 4 (ARMv7), cr=10c5383d
<trim>
[ 0.000000] kasan: Truncating shadow for memory block at
0x40000000-0xffffffff to lowmem region at 0x70000000
[ 0.000000] kasan: Mapping kernel virtual memory block:
c0000000-f0000000 at shadow: b7000000-bd000000
[ 0.000000] kasan: Mapping kernel virtual memory block:
bf000000-c0000000 at shadow: b6e00000-b7000000
[ 0.000000] kasan: Kernel address sanitizer initialized
<trim>
[ 0.000000] ftrace: allocating 57178 entries in 112 pages
[ 0.000000] ------------[ cut here ]------------
[ 0.000000] WARNING: CPU: 0 PID: 0 at arch/arm/kernel/insn.c:47
__arm_gen_branch+0x78/0x80
[ 0.000000] Modules linked in:
[ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted
5.10.0-rc3-next-20201110 #2
[ 0.000000] Hardware name: Generic DT based system
[ 0.000000] Backtrace:
[ 0.000000] [<c199f710>] (dump_backtrace) from [<c199fb94>]
(show_stack+0x20/0x24)
[ 0.000000] r9:00000080 r8:c2e00000 r7:c3023060 r6:600000d3
r5:00000000 r4:c3023060
[ 0.000000] [<c199fb74>] (show_stack) from [<c19a7ad0>]
(dump_stack+0xe8/0x10c)
[ 0.000000] [<c19a79e8>] (dump_stack) from [<c0366518>] (__warn+0x140/0x164)
[ 0.000000] r10:00000009 r9:00000000 r8:c2e0e000 r7:00000009
r6:c031986c r5:0000002f
[ 0.000000] r4:c1a0bbe0 r3:c2e06f50
[ 0.000000] [<c03663d8>] (__warn) from [<c19a13ac>]
(warn_slowpath_fmt+0xc0/0x128)
[ 0.000000] r9:c031986c r8:0000002f r7:c1a0bbe0 r6:00000000
r5:c2e03ec0 r4:b75c07cc
[ 0.000000] [<c19a12f0>] (warn_slowpath_fmt) from [<c031986c>]
(__arm_gen_branch+0x78/0x80)
[ 0.000000] r10:0000d247 r9:c4019238 r8:c400c104 r7:c2e070a0
r6:c400c108 r5:c0319250
[ 0.000000] r4:00000000
[ 0.000000] [<c03197f4>] (__arm_gen_branch) from [<c0319720>]
(ftrace_make_nop+0x30/0x48)
[ 0.000000] r5:c0319250 r4:c2b00354
[ 0.000000] [<c03196f0>] (ftrace_make_nop) from [<c04ac104>]
(ftrace_process_locs+0x470/0x5f0)
[ 0.000000] r5:00001248 r4:c400c100
[ 0.000000] [<c04abc94>] (ftrace_process_locs) from [<c2b2d8f4>]
(ftrace_init+0xa8/0x158)
[ 0.000000] r10:10c5387d r9:c1a87768 r8:c2cb9f98 r7:c2c82230
r6:00000001 r5:c2e070a0
[ 0.000000] r4:c37f5c40
[ 0.000000] [<c2b2d84c>] (ftrace_init) from [<c2b010ec>]
(start_kernel+0x174/0x3f8)
[ 0.000000] r9:00000001 r8:c2e06f00 r7:00000000 r6:c2e06f00
r5:c37c0000 r4:ffffffff
[ 0.000000] [<c2b00f78>] (start_kernel) from [<00000000>] (0x0)
[ 0.000000] r9:410fd034 r8:48000000 r7:ffffffff r6:10c0387d
r5:00000051 r4:c2b00334
[ 0.000000] random: get_random_bytes called from
print_oops_end_marker+0x30/0xa0 with crng_init=0
[ 0.000000] ---[ end trace 0000000000000000 ]---
[ #
0.000000] ------------[ ftrace bug ]------------
[ 0.000000] ftrace failed to modify
[ 0.000000] [<c2b00354>] set_reset_devices+0x10/0x28
[ 0.000000] actual: 0a:3d:04:eb
[ 0.000000] Initializing ftrace call sites
[ 0.000000] ftrace record flags: 0
[ 0.000000] (0)
[ 0.000000] expected tramp: c031925c
[ 0.000000] ------------[ cut here ]------------
[ 0.000000] WARNING: CPU: 0 PID: 0 at kernel/trace/ftrace.c:2065
ftrace_bug+0x218/0x280
[ 0.000000] Modules linked in:
[ 0.000000] CPU: 0 PID: 0 Comm: swapper Tainted: G W
5.10.0-rc3-next-20201110 #2
[ 0.000000] Hardware name: Generic DT based system
[ 0.000000] Backtrace:
[ 0.000000] [<c199f710>] (dump_backtrace) from [<c199fb94>]
(show_stack+0x20/0x24)
[ 0.000000] r9:00000080 r8:c2e00000 r7:c3023060 r6:600000d3
r5:00000000 r4:c3023060
[ 0.000000] [<c199fb74>] (show_stack) from [<c19a7ad0>]
(dump_stack+0xe8/0x10c)
[ 0.000000] [<c19a79e8>] (dump_stack) from [<c0366518>] (__warn+0x140/0x164)
[ 0.000000] r10:00000009 r9:00000000 r8:c2e0e000 r7:00000009
r6:c19a3790 r5:00000811
[ 0.000000] r4:c1a863c0 r3:c2e06f50
[ 0.000000] [<c03663d8>] (__warn) from [<c19a13ac>]
(warn_slowpath_fmt+0xc0/0x128)
[ 0.000000] r9:c19a3790 r8:00000811 r7:c1a863c0 r6:00000000
r5:c2e03ee0 r4:b75c07d0
[ 0.000000] [<c19a12f0>] (warn_slowpath_fmt) from [<c19a3790>]
(ftrace_bug+0x218/0x280)
[ 0.000000] r10:0000d247 r9:c4019238 r8:c400c104 r7:c37f5c40
r6:c1a86960 r5:c401923c
[ 0.000000] r4:c4019238
[ 0.000000] [<c19a3578>] (ftrace_bug) from [<c04abfc0>]
(ftrace_process_locs+0x32c/0x5f0)
[ 0.000000] r7:c2e070a0 r6:c400c108 r5:00001248 r4:c400c100
[ 0.000000] [<c04abc94>] (ftrace_process_locs) from [<c2b2d8f4>]
(ftrace_init+0xa8/0x158)
[ 0.000000] r10:10c5387d r9:c1a87768 r8:c2cb9f98 r7:c2c82230
r6:00000001 r5:c2e070a0
[ 0.000000] r4:c37f5c40
[ 0.000000] [<c2b2d84c>] (ftrace_init) from [<c2b010ec>]
(start_kernel+0x174/0x3f8)
[ 0.000000] r9:00000001 r8:c2e06f00 r7:00000000 r6:c2e06f00
r5:c37c0000 r4:ffffffff
[ 0.000000] [<c2b00f78>] (start_kernel) from [<00000000>] (0x0)
[ 0.000000] r9:410fd034 r8:48000000 r7:ffffffff r6:10c0387d
r5:00000051 r4:c2b00334
[ 0.000000] ---[ end trace f68728a0d3053b52 ]---
[ 0.000000] ftrace: allocated 112 pages with 3 groups
metadata:
git branch: master
git repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
git describe: next-20201110
make_kernelversion: 5.10.0-rc3
build : https://builds.tuxbuild.com/1k5bYasxkHF7omMh7mjtxjRtkMe/
The qemu boot command,
-----------------------------------
/usr/bin/qemu-system-aarch64 -cpu host,aarch64=off -machine
virt-2.10,accel=kvm -nographic -net
nic,model=virtio,macaddr=BA:DD:AD:CC:09:03 -net tap -m 2048 -monitor
none -kernel kernel/zImage --append "console=ttyAMA0 root=/dev/vda rw"
-hda rpb-console-image-lkft-am57xx-evm-20201022181203-3085.rootfs.ext4
-m 4096 -smp 2 -nographic
Full log:
https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20201110/testrun/3420437/suite/linux-log-parser/test/check-kernel-warning-1927841/log
--
Linaro LKFT
https://lkft.linaro.org
On Wed, 11 Nov 2020 at 07:13, Naresh Kamboju <[email protected]> wrote:
>
> The following kernel warning noticed on arm KASAN enabled config while booting.
>
> [ 0.000000] Linux version 5.10.0-rc3-next-20201110
> (tuxmake@e15fe3b4fdc6) (arm-linux-gnueabihf-gcc (Debian 9.3.0-13)
> 9.3.0, GNU ld (GNU Binutils for Debian) 2.35.1) #2 SMP Tue Nov 10
> 07:49:47 UTC 2020
> [ 0.000000] CPU: ARMv7 Processor [410fd034] revision 4 (ARMv7), cr=10c5383d
> <trim>
> [ 0.000000] kasan: Truncating shadow for memory block at
> 0x40000000-0xffffffff to lowmem region at 0x70000000
> [ 0.000000] kasan: Mapping kernel virtual memory block:
> c0000000-f0000000 at shadow: b7000000-bd000000
> [ 0.000000] kasan: Mapping kernel virtual memory block:
> bf000000-c0000000 at shadow: b6e00000-b7000000
> [ 0.000000] kasan: Kernel address sanitizer initialized
> <trim>
> [ 0.000000] ftrace: allocating 57178 entries in 112 pages
> [ 0.000000] ------------[ cut here ]------------
> [ 0.000000] WARNING: CPU: 0 PID: 0 at arch/arm/kernel/insn.c:47
> __arm_gen_branch+0x78/0x80
> [ 0.000000] Modules linked in:
> [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted
> 5.10.0-rc3-next-20201110 #2
> [ 0.000000] Hardware name: Generic DT based system
> [ 0.000000] Backtrace:
> [ 0.000000] [<c199f710>] (dump_backtrace) from [<c199fb94>]
> (show_stack+0x20/0x24)
> [ 0.000000] r9:00000080 r8:c2e00000 r7:c3023060 r6:600000d3
> r5:00000000 r4:c3023060
> [ 0.000000] [<c199fb74>] (show_stack) from [<c19a7ad0>]
> (dump_stack+0xe8/0x10c)
> [ 0.000000] [<c19a79e8>] (dump_stack) from [<c0366518>] (__warn+0x140/0x164)
> [ 0.000000] r10:00000009 r9:00000000 r8:c2e0e000 r7:00000009
> r6:c031986c r5:0000002f
> [ 0.000000] r4:c1a0bbe0 r3:c2e06f50
> [ 0.000000] [<c03663d8>] (__warn) from [<c19a13ac>]
> (warn_slowpath_fmt+0xc0/0x128)
> [ 0.000000] r9:c031986c r8:0000002f r7:c1a0bbe0 r6:00000000
> r5:c2e03ec0 r4:b75c07cc
> [ 0.000000] [<c19a12f0>] (warn_slowpath_fmt) from [<c031986c>]
> (__arm_gen_branch+0x78/0x80)
> [ 0.000000] r10:0000d247 r9:c4019238 r8:c400c104 r7:c2e070a0
> r6:c400c108 r5:c0319250
> [ 0.000000] r4:00000000
> [ 0.000000] [<c03197f4>] (__arm_gen_branch) from [<c0319720>]
> (ftrace_make_nop+0x30/0x48)
> [ 0.000000] r5:c0319250 r4:c2b00354
> [ 0.000000] [<c03196f0>] (ftrace_make_nop) from [<c04ac104>]
> (ftrace_process_locs+0x470/0x5f0)
> [ 0.000000] r5:00001248 r4:c400c100
> [ 0.000000] [<c04abc94>] (ftrace_process_locs) from [<c2b2d8f4>]
> (ftrace_init+0xa8/0x158)
> [ 0.000000] r10:10c5387d r9:c1a87768 r8:c2cb9f98 r7:c2c82230
> r6:00000001 r5:c2e070a0
> [ 0.000000] r4:c37f5c40
> [ 0.000000] [<c2b2d84c>] (ftrace_init) from [<c2b010ec>]
> (start_kernel+0x174/0x3f8)
> [ 0.000000] r9:00000001 r8:c2e06f00 r7:00000000 r6:c2e06f00
> r5:c37c0000 r4:ffffffff
> [ 0.000000] [<c2b00f78>] (start_kernel) from [<00000000>] (0x0)
> [ 0.000000] r9:410fd034 r8:48000000 r7:ffffffff r6:10c0387d
> r5:00000051 r4:c2b00334
> [ 0.000000] random: get_random_bytes called from
> print_oops_end_marker+0x30/0xa0 with crng_init=0
> [ 0.000000] ---[ end trace 0000000000000000 ]---
> [ #
> 0.000000] ------------[ ftrace bug ]------------
> [ 0.000000] ftrace failed to modify
> [ 0.000000] [<c2b00354>] set_reset_devices+0x10/0x28
> [ 0.000000] actual: 0a:3d:04:eb
> [ 0.000000] Initializing ftrace call sites
> [ 0.000000] ftrace record flags: 0
> [ 0.000000] (0)
> [ 0.000000] expected tramp: c031925c
> [ 0.000000] ------------[ cut here ]------------
> [ 0.000000] WARNING: CPU: 0 PID: 0 at kernel/trace/ftrace.c:2065
> ftrace_bug+0x218/0x280
> [ 0.000000] Modules linked in:
> [ 0.000000] CPU: 0 PID: 0 Comm: swapper Tainted: G W
> 5.10.0-rc3-next-20201110 #2
> [ 0.000000] Hardware name: Generic DT based system
> [ 0.000000] Backtrace:
> [ 0.000000] [<c199f710>] (dump_backtrace) from [<c199fb94>]
> (show_stack+0x20/0x24)
> [ 0.000000] r9:00000080 r8:c2e00000 r7:c3023060 r6:600000d3
> r5:00000000 r4:c3023060
> [ 0.000000] [<c199fb74>] (show_stack) from [<c19a7ad0>]
> (dump_stack+0xe8/0x10c)
> [ 0.000000] [<c19a79e8>] (dump_stack) from [<c0366518>] (__warn+0x140/0x164)
> [ 0.000000] r10:00000009 r9:00000000 r8:c2e0e000 r7:00000009
> r6:c19a3790 r5:00000811
> [ 0.000000] r4:c1a863c0 r3:c2e06f50
> [ 0.000000] [<c03663d8>] (__warn) from [<c19a13ac>]
> (warn_slowpath_fmt+0xc0/0x128)
> [ 0.000000] r9:c19a3790 r8:00000811 r7:c1a863c0 r6:00000000
> r5:c2e03ee0 r4:b75c07d0
> [ 0.000000] [<c19a12f0>] (warn_slowpath_fmt) from [<c19a3790>]
> (ftrace_bug+0x218/0x280)
> [ 0.000000] r10:0000d247 r9:c4019238 r8:c400c104 r7:c37f5c40
> r6:c1a86960 r5:c401923c
> [ 0.000000] r4:c4019238
> [ 0.000000] [<c19a3578>] (ftrace_bug) from [<c04abfc0>]
> (ftrace_process_locs+0x32c/0x5f0)
> [ 0.000000] r7:c2e070a0 r6:c400c108 r5:00001248 r4:c400c100
> [ 0.000000] [<c04abc94>] (ftrace_process_locs) from [<c2b2d8f4>]
> (ftrace_init+0xa8/0x158)
> [ 0.000000] r10:10c5387d r9:c1a87768 r8:c2cb9f98 r7:c2c82230
> r6:00000001 r5:c2e070a0
> [ 0.000000] r4:c37f5c40
> [ 0.000000] [<c2b2d84c>] (ftrace_init) from [<c2b010ec>]
> (start_kernel+0x174/0x3f8)
> [ 0.000000] r9:00000001 r8:c2e06f00 r7:00000000 r6:c2e06f00
> r5:c37c0000 r4:ffffffff
> [ 0.000000] [<c2b00f78>] (start_kernel) from [<00000000>] (0x0)
> [ 0.000000] r9:410fd034 r8:48000000 r7:ffffffff r6:10c0387d
> r5:00000051 r4:c2b00334
> [ 0.000000] ---[ end trace f68728a0d3053b52 ]---
> [ 0.000000] ftrace: allocated 112 pages with 3 groups
>
> metadata:
> git branch: master
> git repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
> git describe: next-20201110
> make_kernelversion: 5.10.0-rc3
> build : https://builds.tuxbuild.com/1k5bYasxkHF7omMh7mjtxjRtkMe/
>
> The qemu boot command,
> -----------------------------------
> /usr/bin/qemu-system-aarch64 -cpu host,aarch64=off -machine
> virt-2.10,accel=kvm -nographic -net
> nic,model=virtio,macaddr=BA:DD:AD:CC:09:03 -net tap -m 2048 -monitor
> none -kernel kernel/zImage --append "console=ttyAMA0 root=/dev/vda rw"
> -hda rpb-console-image-lkft-am57xx-evm-20201022181203-3085.rootfs.ext4
> -m 4096 -smp 2 -nographic
>
> Full log:
> https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20201110/testrun/3420437/suite/linux-log-parser/test/check-kernel-warning-1927841/log
>
The kernel you are building is too big.
An ordinary multi_v7_defconfig+thumb2 has
(10240K kernel code, 2232K rwdata, 5344K rodata, 2048K init, 441K bss,
144040K reserved, 65536K cma-reserved, 3340512K highmem)
whereas your kernel has
(23552K kernel code, 9970K rwdata, 16736K rodata, 3072K init, 4849K
bss, 189072K reserved, 65536K cma-reserved, 2293756K highmem)
and so the kernel text section is too large to resolve relative branches.
Which config are you building?
On Wed, Nov 11, 2020 at 9:15 AM Ard Biesheuvel <[email protected]> wrote:
> (23552K kernel code, 9970K rwdata, 16736K rodata, 3072K init, 4849K
> bss, 189072K reserved, 65536K cma-reserved, 2293756K highmem)
>
> and so the kernel text section is too large to resolve relative branches.
Hm, that's really exotic but it's bound to happen. It'd be great if we
could warn about that. Maybe even at link
time, I wonder how hard it would be?
Yours,
Linus Walleij
On Wed, Nov 11, 2020 at 9:15 AM Ard Biesheuvel <[email protected]> wrote:
>
> On Wed, 11 Nov 2020 at 07:13, Naresh Kamboju <[email protected]> wrote:
> >
> > The following kernel warning noticed on arm KASAN enabled config while booting.
> >
> > [ 0.000000] Linux version 5.10.0-rc3-next-20201110
> > (tuxmake@e15fe3b4fdc6) (arm-linux-gnueabihf-gcc (Debian 9.3.0-13)
> > 9.3.0, GNU ld (GNU Binutils for Debian) 2.35.1) #2 SMP Tue Nov 10
> > 07:49:47 UTC 2020
> > [ 0.000000] CPU: ARMv7 Processor [410fd034] revision 4 (ARMv7), cr=10c5383d
> > <trim>
> > [ 0.000000] kasan: Truncating shadow for memory block at
> > 0x40000000-0xffffffff to lowmem region at 0x70000000
> > [ 0.000000] kasan: Mapping kernel virtual memory block:
> > c0000000-f0000000 at shadow: b7000000-bd000000
> > [ 0.000000] kasan: Mapping kernel virtual memory block:
> > bf000000-c0000000 at shadow: b6e00000-b7000000
> > [ 0.000000] kasan: Kernel address sanitizer initialized
> > <trim>
> > [ 0.000000] ftrace: allocating 57178 entries in 112 pages
> > [ 0.000000] ------------[ cut here ]------------
> > [ 0.000000] WARNING: CPU: 0 PID: 0 at arch/arm/kernel/insn.c:47
> > __arm_gen_branch+0x78/0x80
> > [ 0.000000] Modules linked in:
> > [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted
> > 5.10.0-rc3-next-20201110 #2
> > [ 0.000000] Hardware name: Generic DT based system
> > [ 0.000000] Backtrace:
> > [ 0.000000] [<c199f710>] (dump_backtrace) from [<c199fb94>]
> > (show_stack+0x20/0x24)
> > [ 0.000000] r9:00000080 r8:c2e00000 r7:c3023060 r6:600000d3
> > r5:00000000 r4:c3023060
> > [ 0.000000] [<c199fb74>] (show_stack) from [<c19a7ad0>]
> > (dump_stack+0xe8/0x10c)
> > [ 0.000000] [<c19a79e8>] (dump_stack) from [<c0366518>] (__warn+0x140/0x164)
> > [ 0.000000] r10:00000009 r9:00000000 r8:c2e0e000 r7:00000009
> > r6:c031986c r5:0000002f
> > [ 0.000000] r4:c1a0bbe0 r3:c2e06f50
> > [ 0.000000] [<c03663d8>] (__warn) from [<c19a13ac>]
> > (warn_slowpath_fmt+0xc0/0x128)
> > [ 0.000000] r9:c031986c r8:0000002f r7:c1a0bbe0 r6:00000000
> > r5:c2e03ec0 r4:b75c07cc
> > [ 0.000000] [<c19a12f0>] (warn_slowpath_fmt) from [<c031986c>]
> > (__arm_gen_branch+0x78/0x80)
> > [ 0.000000] r10:0000d247 r9:c4019238 r8:c400c104 r7:c2e070a0
> > r6:c400c108 r5:c0319250
> > [ 0.000000] r4:00000000
> > [ 0.000000] [<c03197f4>] (__arm_gen_branch) from [<c0319720>]
> > (ftrace_make_nop+0x30/0x48)
> > [ 0.000000] r5:c0319250 r4:c2b00354
> > [ 0.000000] [<c03196f0>] (ftrace_make_nop) from [<c04ac104>]
> > (ftrace_process_locs+0x470/0x5f0)
> > [ 0.000000] r5:00001248 r4:c400c100
> > [ 0.000000] [<c04abc94>] (ftrace_process_locs) from [<c2b2d8f4>]
> > (ftrace_init+0xa8/0x158)
> > [ 0.000000] r10:10c5387d r9:c1a87768 r8:c2cb9f98 r7:c2c82230
> > r6:00000001 r5:c2e070a0
> > [ 0.000000] r4:c37f5c40
> > [ 0.000000] [<c2b2d84c>] (ftrace_init) from [<c2b010ec>]
> > (start_kernel+0x174/0x3f8)
> > [ 0.000000] r9:00000001 r8:c2e06f00 r7:00000000 r6:c2e06f00
> > r5:c37c0000 r4:ffffffff
> > [ 0.000000] [<c2b00f78>] (start_kernel) from [<00000000>] (0x0)
> > [ 0.000000] r9:410fd034 r8:48000000 r7:ffffffff r6:10c0387d
> > r5:00000051 r4:c2b00334
> > [ 0.000000] random: get_random_bytes called from
> > print_oops_end_marker+0x30/0xa0 with crng_init=0
> > [ 0.000000] ---[ end trace 0000000000000000 ]---
> > [ #
> > 0.000000] ------------[ ftrace bug ]------------
> > [ 0.000000] ftrace failed to modify
> > [ 0.000000] [<c2b00354>] set_reset_devices+0x10/0x28
> > [ 0.000000] actual: 0a:3d:04:eb
> > [ 0.000000] Initializing ftrace call sites
> > [ 0.000000] ftrace record flags: 0
> > [ 0.000000] (0)
> > [ 0.000000] expected tramp: c031925c
> > [ 0.000000] ------------[ cut here ]------------
> > [ 0.000000] WARNING: CPU: 0 PID: 0 at kernel/trace/ftrace.c:2065
> > ftrace_bug+0x218/0x280
> > [ 0.000000] Modules linked in:
> > [ 0.000000] CPU: 0 PID: 0 Comm: swapper Tainted: G W
> > 5.10.0-rc3-next-20201110 #2
> > [ 0.000000] Hardware name: Generic DT based system
> > [ 0.000000] Backtrace:
> > [ 0.000000] [<c199f710>] (dump_backtrace) from [<c199fb94>]
> > (show_stack+0x20/0x24)
> > [ 0.000000] r9:00000080 r8:c2e00000 r7:c3023060 r6:600000d3
> > r5:00000000 r4:c3023060
> > [ 0.000000] [<c199fb74>] (show_stack) from [<c19a7ad0>]
> > (dump_stack+0xe8/0x10c)
> > [ 0.000000] [<c19a79e8>] (dump_stack) from [<c0366518>] (__warn+0x140/0x164)
> > [ 0.000000] r10:00000009 r9:00000000 r8:c2e0e000 r7:00000009
> > r6:c19a3790 r5:00000811
> > [ 0.000000] r4:c1a863c0 r3:c2e06f50
> > [ 0.000000] [<c03663d8>] (__warn) from [<c19a13ac>]
> > (warn_slowpath_fmt+0xc0/0x128)
> > [ 0.000000] r9:c19a3790 r8:00000811 r7:c1a863c0 r6:00000000
> > r5:c2e03ee0 r4:b75c07d0
> > [ 0.000000] [<c19a12f0>] (warn_slowpath_fmt) from [<c19a3790>]
> > (ftrace_bug+0x218/0x280)
> > [ 0.000000] r10:0000d247 r9:c4019238 r8:c400c104 r7:c37f5c40
> > r6:c1a86960 r5:c401923c
> > [ 0.000000] r4:c4019238
> > [ 0.000000] [<c19a3578>] (ftrace_bug) from [<c04abfc0>]
> > (ftrace_process_locs+0x32c/0x5f0)
> > [ 0.000000] r7:c2e070a0 r6:c400c108 r5:00001248 r4:c400c100
> > [ 0.000000] [<c04abc94>] (ftrace_process_locs) from [<c2b2d8f4>]
> > (ftrace_init+0xa8/0x158)
> > [ 0.000000] r10:10c5387d r9:c1a87768 r8:c2cb9f98 r7:c2c82230
> > r6:00000001 r5:c2e070a0
> > [ 0.000000] r4:c37f5c40
> > [ 0.000000] [<c2b2d84c>] (ftrace_init) from [<c2b010ec>]
> > (start_kernel+0x174/0x3f8)
> > [ 0.000000] r9:00000001 r8:c2e06f00 r7:00000000 r6:c2e06f00
> > r5:c37c0000 r4:ffffffff
> > [ 0.000000] [<c2b00f78>] (start_kernel) from [<00000000>] (0x0)
> > [ 0.000000] r9:410fd034 r8:48000000 r7:ffffffff r6:10c0387d
> > r5:00000051 r4:c2b00334
> > [ 0.000000] ---[ end trace f68728a0d3053b52 ]---
> > [ 0.000000] ftrace: allocated 112 pages with 3 groups
> >
> > metadata:
> > git branch: master
> > git repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
> > git describe: next-20201110
> > make_kernelversion: 5.10.0-rc3
> > build : https://builds.tuxbuild.com/1k5bYasxkHF7omMh7mjtxjRtkMe/
> >
> > The qemu boot command,
> > -----------------------------------
> > /usr/bin/qemu-system-aarch64 -cpu host,aarch64=off -machine
> > virt-2.10,accel=kvm -nographic -net
> > nic,model=virtio,macaddr=BA:DD:AD:CC:09:03 -net tap -m 2048 -monitor
> > none -kernel kernel/zImage --append "console=ttyAMA0 root=/dev/vda rw"
> > -hda rpb-console-image-lkft-am57xx-evm-20201022181203-3085.rootfs.ext4
> > -m 4096 -smp 2 -nographic
> >
> > Full log:
> > https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20201110/testrun/3420437/suite/linux-log-parser/test/check-kernel-warning-1927841/log
> >
>
> The kernel you are building is too big.
>
> An ordinary multi_v7_defconfig+thumb2 has
>
> (10240K kernel code, 2232K rwdata, 5344K rodata, 2048K init, 441K bss,
> 144040K reserved, 65536K cma-reserved, 3340512K highmem)
>
> whereas your kernel has
>
> (23552K kernel code, 9970K rwdata, 16736K rodata, 3072K init, 4849K
> bss, 189072K reserved, 65536K cma-reserved, 2293756K highmem)
>
> and so the kernel text section is too large to resolve relative branches.
>
> Which config are you building?
The config available from the 'build' link above:
https://builds.tuxbuild.com/1k5bYasxkHF7omMh7mjtxjRtkMe/config
This is a diff of that against multi_v7_defconfig: https://pastebin.com/v2uxkrCe
I ran that on v5.10-rc1, so it's missing KASAN.
I don't think any of the individual drivers is going to be a huge difference,
but these are the ones that might add a percentage to the overall build:
CONFIG_NAMESPACES
CONFIG_KALLSYMS_ALL
CONFIG_KPROBES
CONFIG_KSM
CONFIG_VIDEO_V4L2
CONFIG_FUNCTION_TRACER
CONFIG_DYNAMIC_FTRACE
CONFIG_IRQSOFF_TRACER
CONFIG_KPROBE_EVENTS
CONFIG_FTRACE_MCOUNT_RECORD
CONFIG_UNWINDER_FRAME_POINTER
CONFIG_KASAN
My guess is that the combination of a few of the above
doubles the size.
Arnd