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confirm this issue on my system: > > Hardware: ASUS ROG STRIX B650E-I (AMD Ryzen), 64GB RAM > Storage: btrfs with zram swap > Kernel: 7.0.0-rc1 (commit 6de23f81a5e0+) > > I was seeing the same kswapd0 page allocation failures periodically > under memory pressure with the identical call trace through > alloc_from_pcs -> __pcs_replace_empty_main -> refill_objects -> > allocate_slab. > > Chris's btrfs __GFP_NOWARN patch suppresses the btrfs-originated > warnings, but after ~10 hours I hit the same sheaf refill failure > from a different caller -- amdgpu via kmalloc: > > chrome: page allocation failure: order:0, > mode:0xc0cc0(GFP_KERNEL|__GFP_COMP|__GFP_NOMEMALLOC) > > allocate_slab > refill_objects > __pcs_replace_empty_main > __kmalloc_cache_noprof > drm_suballoc_new > amdgpu_sa_bo_new Hi Mikhail, In this case __GFP_NOWARN is not specified, so indeed we need slab side fix. > This confirms the fix needs to be on the slab side as Harry > suggested -- adding __GFP_NOWARN to sheaf refill when there's > a fallback path -- rather than patching individual callers. Thanks for testing and sharing the result! That's very helpful. > Happy to test any slab-side fix. Slab fix is submitted here, please feel free to test: https://lore.kernel.org/linux-mm/20260223133322.16705-1-harry.yoo@oracle.com -- Cheers, Harry / Hyeonggon