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

On Mar 12, 2018, at 2:00 PM, Alexei Starovoitov [off-list ref] wrote:

On 3/12/18 1:39 PM, Song Liu wrote:

quoted

+	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