Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
net: add struct net_aligned_data
This structure will hold networking data that must
consume a full cache line to avoid accidental false sharing.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20250630093540.3052835-2-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
authored by
Eric Dumazet
and committed by
Jakub Kicinski
3715b5df
a8065af3
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include/net/aligned_data.h
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include/net/aligned_data.h
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef _NET_ALIGNED_DATA_H
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#define _NET_ALIGNED_DATA_H
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#include <linux/types.h>
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/* Structure holding cacheline aligned fields on SMP builds.
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* Each field or group should have an ____cacheline_aligned_in_smp
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* attribute to ensure no accidental false sharing can happen.
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*/
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struct net_aligned_data {
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};
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extern struct net_aligned_data net_aligned_data;
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#endif /* _NET_ALIGNED_DATA_H */
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net/core/hotdata.c
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net/core/hotdata.c
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#include <linux/cache.h>
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#include <linux/jiffies.h>
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#include <linux/list.h>
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#include <net/aligned_data.h>
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#include <net/hotdata.h>
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#include <net/proto_memory.h>
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···
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.sysctl_mem_pcpu_rsv = SK_MEMORY_PCPU_RESERVE
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};
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EXPORT_SYMBOL(net_hotdata);
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struct net_aligned_data net_aligned_data;