From: Alexei Starovoitov Date: Sat, 22 Oct 2022 02:17:38 +0000 (-0700) Subject: Merge branch 'Wait for busy refill_work when destroying bpf memory allocator' X-Git-Tag: v6.1-rc5~107^2~2^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=bed54aeb6ac1ced7e0ea27a82ee52af856610ff0;p=platform%2Fkernel%2Flinux-starfive.git Merge branch 'Wait for busy refill_work when destroying bpf memory allocator' Hou Tao says: ==================== From: Hou Tao Hi, The patchset aims to fix one problem of bpf memory allocator destruction when there is PREEMPT_RT kernel or kernel with arch_irq_work_has_interrupt() being false (e.g. 1-cpu arm32 host or mips). The root cause is that there may be busy refill_work when the allocator is destroying and it may incur oops or other problems as shown in patch #1. Patch #1 fixes the problem by waiting for the completion of irq work during destroying and patch #2 is just a clean-up patch based on patch #1. Please see individual patches for more details. Comments are always welcome. Change Log: v2: * patch 1: fix typos and add notes about the overhead of irq_work_sync() * patch 1 & 2: add Acked-by tags from sdf@google.com v1: https://lore.kernel.org/bpf/20221019115539.983394-1-houtao@huaweicloud.com/T/#t ==================== Signed-off-by: Alexei Starovoitov --- bed54aeb6ac1ced7e0ea27a82ee52af856610ff0