From: patchwork-bot+netdevbpf@kernel.org
To: Amery Hung <ameryhung@gmail.com>
Cc: bpf@vger.kernel.org, netdev@vger.kernel.org,
alexei.starovoitov@gmail.com, andrii@kernel.org,
daniel@iogearbox.net, memxor@gmail.com, martin.lau@kernel.org,
kpsingh@kernel.org, yonghong.song@linux.dev, song@kernel.org,
haoluo@google.com, kernel-team@meta.com
Subject: Re: [PATCH bpf-next v7 00/17] Remove task and cgroup local storage percpu counters
Date: Fri, 06 Feb 2026 23:00:28 +0000 [thread overview]
Message-ID: <177041882833.1106743.17316630593839442939.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20260205222916.1788211-1-ameryhung@gmail.com>
Hello:
This series was applied to bpf/bpf-next.git (master)
by Martin KaFai Lau <martin.lau@kernel.org>:
On Thu, 5 Feb 2026 14:28:58 -0800 you wrote:
> * Motivation *
>
> The goal of this patchset is to make bpf syscalls and helpers updating
> task and cgroup local storage more robust by removing percpu counters
> in them. Task local storage and cgroup storage each employs a percpu
> counter to prevent deadlock caused by recursion. Since the underlying
> bpf local storage takes spinlocks in various operations, bpf programs
> running recursively may try to take a spinlock which is already taken.
> For example, when a tracing bpf program called recursively during
> bpf_task_storage_get(..., F_CREATE) tries to call
> bpf_task_storage_get(..., F_CREATE) again, it will cause AA deadlock
> if the percpu variable is not in place.
>
> [...]
Here is the summary with links:
- [bpf-next,v7,01/17] bpf: Select bpf_local_storage_map_bucket based on bpf_local_storage
https://git.kernel.org/bpf/bpf-next/c/0ccef7079ea8
- [bpf-next,v7,02/17] bpf: Convert bpf_selem_unlink_map to failable
https://git.kernel.org/bpf/bpf-next/c/1b7e0cae85ac
- [bpf-next,v7,03/17] bpf: Convert bpf_selem_link_map to failable
https://git.kernel.org/bpf/bpf-next/c/fd103ffc57c9
- [bpf-next,v7,04/17] bpf: Convert bpf_selem_unlink to failable
https://git.kernel.org/bpf/bpf-next/c/403e935f9158
- [bpf-next,v7,05/17] bpf: Change local_storage->lock and b->lock to rqspinlock
https://git.kernel.org/bpf/bpf-next/c/8dabe34b9d5b
- [bpf-next,v7,06/17] bpf: Remove task local storage percpu counter
https://git.kernel.org/bpf/bpf-next/c/4a98c2efa613
- [bpf-next,v7,07/17] bpf: Remove cgroup local storage percpu counter
https://git.kernel.org/bpf/bpf-next/c/5254de7b9607
- [bpf-next,v7,08/17] bpf: Remove unused percpu counter from bpf_local_storage_map_free
https://git.kernel.org/bpf/bpf-next/c/3417dffb5833
- [bpf-next,v7,09/17] bpf: Prepare for bpf_selem_unlink_nofail()
https://git.kernel.org/bpf/bpf-next/c/c8be3da14718
- [bpf-next,v7,10/17] bpf: Support lockless unlink when freeing map or local storage
https://git.kernel.org/bpf/bpf-next/c/5d800f87d0a5
- [bpf-next,v7,11/17] bpf: Switch to bpf_selem_unlink_nofail in bpf_local_storage_{map_free, destroy}
https://git.kernel.org/bpf/bpf-next/c/0be08389c7f2
- [bpf-next,v7,12/17] selftests/bpf: Update sk_storage_omem_uncharge test
https://git.kernel.org/bpf/bpf-next/c/d652f425d5e3
- [bpf-next,v7,13/17] selftests/bpf: Update task_local_storage/recursion test
https://git.kernel.org/bpf/bpf-next/c/e4772031d105
- [bpf-next,v7,14/17] selftests/bpf: Update task_local_storage/task_storage_nodeadlock test
https://git.kernel.org/bpf/bpf-next/c/902a79b6389f
- [bpf-next,v7,15/17] selftests/bpf: Remove test_task_storage_map_stress_lookup
https://git.kernel.org/bpf/bpf-next/c/e02cf06b85f8
- [bpf-next,v7,16/17] selftests/bpf: Choose another percpu variable in bpf for btf_dump test
https://git.kernel.org/bpf/bpf-next/c/cdce7b0848f6
- [bpf-next,v7,17/17] selftests/bpf: Fix outdated test on storage->smap
https://git.kernel.org/bpf/bpf-next/c/97b859b5ed04
You are awesome, thank you!
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prev parent reply other threads:[~2026-02-06 23:00 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-05 22:28 [PATCH bpf-next v7 00/17] Remove task and cgroup local storage percpu counters Amery Hung
2026-02-05 22:28 ` [PATCH bpf-next v7 01/17] bpf: Select bpf_local_storage_map_bucket based on bpf_local_storage Amery Hung
2026-02-05 22:29 ` [PATCH bpf-next v7 02/17] bpf: Convert bpf_selem_unlink_map to failable Amery Hung
2026-02-05 22:29 ` [PATCH bpf-next v7 03/17] bpf: Convert bpf_selem_link_map " Amery Hung
2026-02-05 22:29 ` [PATCH bpf-next v7 04/17] bpf: Convert bpf_selem_unlink " Amery Hung
2026-02-05 22:29 ` [PATCH bpf-next v7 05/17] bpf: Change local_storage->lock and b->lock to rqspinlock Amery Hung
2026-02-05 22:29 ` [PATCH bpf-next v7 06/17] bpf: Remove task local storage percpu counter Amery Hung
2026-02-05 22:29 ` [PATCH bpf-next v7 07/17] bpf: Remove cgroup " Amery Hung
2026-02-05 22:29 ` [PATCH bpf-next v7 08/17] bpf: Remove unused percpu counter from bpf_local_storage_map_free Amery Hung
2026-02-05 22:29 ` [PATCH bpf-next v7 09/17] bpf: Prepare for bpf_selem_unlink_nofail() Amery Hung
2026-02-05 22:29 ` [PATCH bpf-next v7 10/17] bpf: Support lockless unlink when freeing map or local storage Amery Hung
2026-02-06 23:25 ` Martin KaFai Lau
2026-02-05 22:29 ` [PATCH bpf-next v7 11/17] bpf: Switch to bpf_selem_unlink_nofail in bpf_local_storage_{map_free, destroy} Amery Hung
2026-02-05 22:29 ` [PATCH bpf-next v7 12/17] selftests/bpf: Update sk_storage_omem_uncharge test Amery Hung
2026-02-05 22:29 ` [PATCH bpf-next v7 13/17] selftests/bpf: Update task_local_storage/recursion test Amery Hung
2026-02-05 22:29 ` [PATCH bpf-next v7 14/17] selftests/bpf: Update task_local_storage/task_storage_nodeadlock test Amery Hung
2026-02-05 22:29 ` [PATCH bpf-next v7 15/17] selftests/bpf: Remove test_task_storage_map_stress_lookup Amery Hung
2026-02-05 22:29 ` [PATCH bpf-next v7 16/17] selftests/bpf: Choose another percpu variable in bpf for btf_dump test Amery Hung
2026-02-05 22:29 ` [PATCH bpf-next v7 17/17] selftests/bpf: Fix outdated test on storage->smap Amery Hung
2026-02-06 23:00 ` patchwork-bot+netdevbpf [this message]
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