On 5/8/26 7:38 PM, Vlastimil Babka (SUSE) wrote: > On 5/8/26 7:29 PM, Andrew Morton wrote: >> e .configOn Fri, 8 May 2026 18:22:06 +0200 [email protected] wrote: >> >>> Add tracepoints to the page allocator fast paths that acquire >>> zone->lock, allowing diagnosis of lock contention in production. >> >> Thanks, I'm surprised we haven't done this yet. > > There was a recent attempt [1]. Not being a generic solution wasn't welcome. > > [1] https://lore.kernel.org/all/[email protected]/
And this is the generic solution I think? https://lore.kernel.org/all/[email protected]/ >> Unfortunately "mm: use spinlock guards for zone lock" messed this up >> (https://lore.kernel.org/all/[email protected]/). >> >> So please let's give it a few days for reviewers to comment then redo >> against mm.git's mm-unstable branch? >
