ip_reass: drop the volatile keyword from nfrags and mark with __exclusive_cache_line
The keyword adds nothing as all operations on the var are performed through atomic_* Reviewed by: kp Sponsored by: Rubicon Communications, LLC ("Netgate") Differential Revision: https://reviews.freebsd.org/D31526
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@ -137,12 +137,12 @@ ipq_drop(struct ipqbucket *bucket, struct ipq *fp)
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#define IP_MAXFRAGPACKETS (imin(IP_MAXFRAGS, IPREASS_NHASH * 50))
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static int maxfrags;
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static volatile u_int nfrags;
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static u_int __exclusive_cache_line nfrags;
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SYSCTL_INT(_net_inet_ip, OID_AUTO, maxfrags, CTLFLAG_RW,
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&maxfrags, 0,
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"Maximum number of IPv4 fragments allowed across all reassembly queues");
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SYSCTL_UINT(_net_inet_ip, OID_AUTO, curfrags, CTLFLAG_RD,
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__DEVOLATILE(u_int *, &nfrags), 0,
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&nfrags, 0,
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"Current number of IPv4 fragments across all reassembly queues");
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VNET_DEFINE_STATIC(uma_zone_t, ipq_zone);
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