On 3/12/18 2:12 PM, Song Liu wrote:
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.
I see. gfp_mask == 0 and no locks. should work indeed.
curious how perf report looks like for heavy bpf_get_stackid() usage?