On Tue, Apr 18, 2023 at 9:41 AM Ross Burton <[email protected]> wrote: > > In 5c6064 the qemuarm* machines gained vmalloc=256, because in testing > Bruce was seeing problems when the vmalloc area was too big for the > memory size of the machine (eg 256MB). >
default seems to be 128M for 32bit systems with memory < 1G and 256M for memory < 2G but I think using defaults might be preferred it works with original problem too > The intention was for the area to be very small, but 256 bytes is too > small and the kernel sets a minimal vmalloc area of 16MiB: > > [ 0.000000] vmalloc area is too small, limiting to 16MiB > > However, a 16MiB area is too small and results in pages of messages when > you try and use the system: > > [ 242.822481] vmap allocation for size 4100096 failed: use vmalloc=<size> to > increase size > > There have been a number of changes since this commit, remove the > explicit vmalloc argument and use the default. I've tested that the > system still boots locally. > > [1] early_vmalloc(), > https://elixir.bootlin.com/linux/latest/source/arch/arm/mm/mmu.c#L1170 > Signed-off-by: Ross Burton <[email protected]> > --- > meta/conf/machine/qemuarm.conf | 2 -- > meta/conf/machine/qemuarmv5.conf | 1 - > 2 files changed, 3 deletions(-) > > diff --git a/meta/conf/machine/qemuarm.conf b/meta/conf/machine/qemuarm.conf > index c5234231e2e..aa9ce882035 100644 > --- a/meta/conf/machine/qemuarm.conf > +++ b/meta/conf/machine/qemuarm.conf > @@ -17,8 +17,6 @@ QB_SYSTEM_NAME = "qemu-system-arm" > QB_MACHINE = "-machine virt,highmem=off" > QB_CPU = "-cpu cortex-a15" > QB_SMP ?= "-smp 4" > -# Standard Serial console > -QB_KERNEL_CMDLINE_APPEND = "vmalloc=256" > # For graphics to work we need to define the VGA device as well as the > necessary USB devices > QB_GRAPHICS = "-device virtio-gpu-pci" > QB_OPT_APPEND = "-device qemu-xhci -device usb-tablet -device usb-kbd" > diff --git a/meta/conf/machine/qemuarmv5.conf > b/meta/conf/machine/qemuarmv5.conf > index 6e59e42c3ab..ef1b4ece230 100644 > --- a/meta/conf/machine/qemuarmv5.conf > +++ b/meta/conf/machine/qemuarmv5.conf > @@ -12,7 +12,6 @@ SERIAL_CONSOLES ?= "115200;ttyAMA0 115200;ttyAMA1" > # For runqemu > QB_SYSTEM_NAME = "qemu-system-arm" > QB_MACHINE = "-machine versatilepb" > -QB_KERNEL_CMDLINE_APPEND = "vmalloc=256" > QB_GRAPHICS = "-device virtio-gpu-pci" > QB_OPT_APPEND = "-device qemu-xhci -device usb-tablet -device usb-kbd" > QB_DTB = "${@oe.utils.version_less_or_equal('PREFERRED_VERSION_linux-yocto', > '4.7', '', 'zImage-versatile-pb.dtb', d)}" > -- > 2.34.1 > > > >
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