Adam Li 12a686c2e7 net: make SK_MEMORY_PCPU_RESERV tunable ... This patch adds /proc/sys/net/core/mem_pcpu_rsv sysctl file, to make SK_MEMORY_PCPU_RESERV tunable. Commit 3cd3399dd7 ("net: implement per-cpu reserves for memory_allocated") introduced per-cpu forward alloc cache: "Implement a per-cpu cache of +1/-1 MB, to reduce number of changes to sk->sk_prot->memory_allocated, which would otherwise be cause of false sharing." sk_prot->memory_allocated points to global atomic variable: atomic_long_t tcp_memory_allocated ____cacheline_aligned_in_smp; If increasing the per-cpu cache size from 1MB to e.g. 16MB, changes to sk->sk_prot->memory_allocated can be further reduced. Performance may be improved on system with many cores. Signed-off-by: Adam Li <adamli@os.amperecomputing.com> Reviewed-by: Christoph Lameter (Ampere) <cl@linux.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2024-02-28 09:23:08 +00:00
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abi.rst	docs: admin-guide: sysctl: avoid using ReST :doc:`foo` markup	2021-06-17 13:24:36 -06:00
fs.rst	docs: admin-guide: sysctl: fix details of struct dentry_stat_t	2023-10-03 09:25:55 -06:00
index.rst	…
kernel.rst	asm-generic updates for v6.7	2023-11-01 15:28:33 -10:00
net.rst	net: make SK_MEMORY_PCPU_RESERV tunable	2024-02-28 09:23:08 +00:00
sunrpc.rst	…
user.rst	time/namespace: Add max_time_namespaces ucount	2020-04-07 12:37:21 +02:00
vm.rst	docs: mm: fix vm overcommit documentation for OVERCOMMIT_GUESS	2023-10-10 13:35:55 -06:00