bpf: Add sleepable variant of bpf_arena_alloc_pages for kernel callers

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The existing kernel-side export of bpf_arena_alloc_pages is _non_sleepable
only - it's used by the verifier to inline the kfunc when the call site is
non-sleepable. There is no sleepable equivalent for kernel callers. The
kfunc bpf_arena_alloc_pages itself is BPF-only.

sched_ext needs sleepable kernel-side allocs for its arena pool init/grow
paths. Add bpf_arena_alloc_pages_sleepable() mirroring the _non_sleepable
wrapper but passing sleepable=true to arena_alloc_pages().

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com>
Link: https://lore.kernel.org/r/20260522172219.1423324-4-tj@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Tejun Heo 2026-05-22 07:22:14 -10:00 • committed by Alexei Starovoitov

parent dc11a4dba2

commit f211c81ddc

2 changed files with 21 additions and 0 deletions

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8

include/linux/bpf.h

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13

kernel/bpf/arena.c

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