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bpf: Initialize same number of free nodes for each pcpu_freelist #3969

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bpf: Initialize same number of free nodes for each pcpu_freelist #3969

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Pull request for series with
subject: bpf: Initialize same number of free nodes for each pcpu_freelist
version: 1
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=692654

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Upstream branch: 2590609
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=692654
version: 1

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Upstream branch: 2590609
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=692654
version: 1

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Upstream branch: 2590609
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=692654
version: 1

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Upstream branch: 2590609
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=692654
version: 1

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Upstream branch: e8f50c4
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=692654
version: 1

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Upstream branch: e5659e4
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=692654
version: 1

@kernel-patches-bot kernel-patches-bot added V2 and removed V1 labels Nov 8, 2022
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Upstream branch: e5659e4
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=693265
version: 2

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Upstream branch: e5659e4
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=693882
version: 3

@kernel-patches-bot kernel-patches-bot added V3 and removed V2 labels Nov 10, 2022
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Upstream branch: 15157d2
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=693882
version: 3

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Upstream branch: c7028aa
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=694045
version: 4

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Upstream branch: c7028aa
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=694510
version: 5

@kernel-patches-bot kernel-patches-bot added V5 and removed V4 labels Nov 11, 2022
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Upstream branch: c7028aa
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=694510
version: 5

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Upstream branch: c7028aa
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=694510
version: 5

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Upstream branch: 42597aa
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=694510
version: 5

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Upstream branch: 656234e
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=694510
version: 5

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Upstream branch: d9c982d
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=694510
version: 5

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Upstream branch: 1cfa97b
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=694510
version: 5

bpf: Initialize same number of free nodes for each pcpu_freelist
015a46e 
pcpu_freelist_populate() initializes nr_elems / num_possible_cpus() + 1
free nodes for some CPUs, and then possibly one CPU with fewer nodes,
followed by remaining cpus with 0 nodes. For example, when nr_elems == 256
and num_possible_cpus() == 32, CPU 0~27 each gets 9 free nodes, CPU 28 gets
4 free nodes, CPU 29~31 get 0 free nodes, while in fact each CPU should get
8 nodes equally.

This patch initializes nr_elems / num_possible_cpus() free nodes for each
CPU firstly, then allocates the remaining free nodes by one for each CPU
until no free nodes left.

Signed-off-by: Xu Kuohai <xukuohai@huawei.com>
Acked-by: Yonghong Song <yhs@fb.com>
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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=694510 irrelevant now. Closing PR.

@kernel-patches-bot kernel-patches-bot deleted the series/692654=>bpf-next branch November 11, 2022 20:30
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