Re: [PATCH bpf-next v4 1/2] bpf: extend stackmap to save binary_build_id+offset instead of address

[Song Liu]

> On Mar 12, 2018, at 2:00 PM, Alexei Starovoitov <a...@fb.com> wrote:
> 
> On 3/12/18 1:39 PM, Song Liu wrote:
>> +    page = find_get_page(vma->vm_file->f_mapping, 0);
> 
> did you test it with config_debug_atomic_sleep ?
> it should have complained...

Yeah, I have CONFIG_DEBUG_ATOMIC_SLEEP=y. 

I think find_get_page() will not sleep. The variation find_get_page_flags()
may sleep with flag FGP_CREAT. 

Song