On Mon, Jan 16, 2023 at 6:05 PM Xiangyu Chen <[email protected]> wrote: > > From: Xiangyu Chen <[email protected]> > > On master oe, build a qemuppc64 with systemd as default init, when we > use nfs bootup, the kernel might panic due to missing symbol in dynamic > libraries as below: > > hid-generic 0003:0627:0001.0003: input: USB HID v0.01 Mouse [QEMU QEMU USB > Tablet] on usb-0000:00:01.0-3/input0 > /sbin/init: /lib64/libm.so.6: version `XZ_5.0' not found (required by > /usr/lib64/libkmod.so.2) > Kernel panic - not syncing: Attempted to kill init! exitcode=0x00007f00 > CPU: 0 PID: 1 Comm: init Not tainted 5.15.78-yocto-standard #1 > Call Trace: > [c000000007443ba0] [c0000000009538d0] dump_stack_lvl+0x74/0xa8 (unreliable) > [c000000007443be0] [c000000000103524] panic+0x170/0x3cc > [c000000007443c80] [c00000000010cf64] do_exit+0xb44/0xb50 > [c000000007443d50] [c00000000010d040] do_group_exit+0x60/0xd0 > [c000000007443d90] [c00000000010d0d4] sys_exit_group+0x24/0x30 > [c000000007443db0] [c00000000002cfd4] system_call_exception+0x194/0x2f0 > [c000000007443e10] [c00000000000c2cc] system_call_common+0xec/0x250 > --- interrupt: c00 at 0x7fff9ed9e840 > NIP: 00007fff9ed9e840 LR: 00007fff9ed7da20 CTR: 0000000000000000 > REGS: c000000007443e80 TRAP: 0c00 Not tainted (5.15.78-yocto-standard) > MSR: 800000000280f033 <SF,VEC,VSX,EE,PR,FP,ME,IR,DR,RI,LE> CR: 24022442 > XER: 00000000 > > One or more of the libraries systemd depends on failed to load due to > unresolved symbols/functions. This was intermittent - with a failure > rate estimated between 5% and 30%. > > After checking the code, this issue happens on gcc 12, kirkstone is using > gcc 11 works well, with both using the exact same v5.15.84 kernel commit. > > There is a kernel fix from upstream [1], they changed the rsize / wsize > to a multiple of PAGE_SIZE, when we applied this patch, the qemuppc64's > default r/wsize went from 4096 to 524288.But the qemuppc64 doesn't have > its own linux-yocto kernel branch, so apply this change might cause > regression with other platforms which share branch with qemuppc64. > > So, we added an extra option for nfs rootfs, and set the qemuppc64 default > r/w size to 524288 to line up with the kernel fix[1]. > > Yocto did a similar thing in the distant past[2] - prior to boot-arg > adjustments existing - by allowing a Kconfig to set the defaults on > nfsboot, in order to work around hardware limitations. > > Reference: > [1] > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=940261a195080cf > [2] > https://git.yoctoproject.org/linux-yocto-4.1/commit/?h=standard/base&id=a96cfd98add95 > > Signed-off-by: Xiangyu Chen <[email protected]> > --- > meta/conf/machine/qemuppc64.conf | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/meta/conf/machine/qemuppc64.conf > b/meta/conf/machine/qemuppc64.conf > index 304f06a30d..7709339313 100644 > --- a/meta/conf/machine/qemuppc64.conf > +++ b/meta/conf/machine/qemuppc64.conf > @@ -15,6 +15,7 @@ QB_MACHINE = "-machine pseries" > QB_CPU = "-cpu POWER9" > QB_SMP = "-smp 2" > > +QB_NFSROOTFS_EXTRA_OPT = "wsize=524288,rsize=524288"
lgtm > QB_KERNEL_CMDLINE_APPEND = "console=hvc0 nohugevmalloc" > #QB_OPT_APPEND += "-device qemu-xhci -device usb-tablet -device usb-kbd" > QB_OPT_APPEND = "-usb -device usb-tablet" > -- > 2.34.1 > > > >
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