Re: [PATCH v2] mm: page_owner: detect page_owner recursion via task_struct

On 4/2/21 1:53 PM, Sergei Trofimovich wrote: > Before the change page_owner recursion was detected via fetching > backtrace and inspecting it for current instruction pointer. > It has a few problems: > - it is slightly slow as it requires extra backtrace and a linear > stack scan of the result >

[PATCH v2] mm: page_owner: detect page_owner recursion via task_struct

Before the change page_owner recursion was detected via fetching backtrace and inspecting it for current instruction pointer. It has a few problems: - it is slightly slow as it requires extra backtrace and a linear stack scan of the result - it is too late to check if backtrace fetching required