Re: [PATCH bpf-next v4 0/3] Allow mmap of /sys/kernel/btf/vmlinux

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Thu, May 15, 2025 at 08:51:45AM +0100, Alan Maguire wrote:
> > I'd like to cut down the memory usage of parsing vmlinux BTF in ebpf-go.
> > With some upcoming changes the library is sitting at 5MiB for a parse.
> > Most of that memory is simply copying the BTF blob into user space.
> > By allowing vmlinux BTF to be mmapped read-only into user space I can
> > cut memory usage by about 75%.
> > 
> > Signed-off-by: Lorenz Bauer <lmb@xxxxxxxxxxxxx>
> 
> For the series,
> 
> Tested-by: Alan Maguire <alan.maguire@xxxxxxxxxx>
> 
> Tested with 4k and 64k page size on aarch64; all worked perfectly. Thanks!

Hi Alan,

Thanks for taking a look at this. I've been following your related effort
to allow /sys/kernel/btf/vmlinux as a module in support of small systems
with kernel-size constraints, and wondered how this series might affect
that work? Such support would be well-received in the embedded space when
it happens, so am keen to understand.

Thanks,
Tony




[Index of Archives]     [Linux Samsung SoC]     [Linux Rockchip SoC]     [Linux Actions SoC]     [Linux for Synopsys ARC Processors]     [Linux NFS]     [Linux NILFS]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]


  Powered by Linux