ping: convert to RCU lookups, get rid of rwlock

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Using rwlock in networking code is extremely risky.
writers can starve if enough readers are constantly
grabing the rwlock.

I thought rwlock were at fault and sent this patch:

https://lkml.org/lkml/2022/6/17/272

But Peter and Linus essentially told me rwlock had to be unfair.

We need to get rid of rwlock in networking code.

Fixes: c319b4d76b ("net: ipv4: add IPPROTO_ICMP socket kind")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Eric Dumazet 2022-06-17 21:04:15 -07:00 • committed by David S. Miller

parent f0623340fd

commit dbca1596bb

1 changed files with 16 additions and 20 deletions

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net/ipv4/ping.c

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