5.4-rc1 boot regression with kmemleak enabled

[Amir Goldstein]

Hi Catalin,

My kvm-xfstests [1] VM doesn't boot with kmemleak enabled since commit
c5665868183f ("mm: kmemleak: use the memory pool for early allocations").

There is no console output when running:

$ kvm -boot order=c -net none -machine type=pc,accel=kvm:tcg -cpu host \
    -drive file=$ROOTFS,if=virtio,snapshot=on -vga none -nographic \
    -smp 2 -m 2048 -serial mon:stdio --kernel $KERNEL \
    --append 'root=/dev/vda console=ttyS0,115200'

$ kvm --version
QEMU emulator version 2.11.1(Debian 1:2.11+dfsg-1ubuntu7.19)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers

Attached defconfig saved by 'make savedefconfig'.

I tried increasing DEBUG_KMEMLEAK_MEM_POOL_SIZE, which did not help.
I also tried moving kmemleak_init() back to its old location, since this
changes seemed unrelated to the commit. Didn't help either.

Let me know if you have any suggestion how to debug this.

Thanks,
Amir.


[1] https://github.com/tytso/xfstests-bld/blob/master/Documentation/kvm-xfstests.md

Attachment: defconfig
Description: Binary data