> 2023年7月21日 19:51，David Laight <David.Laight@xxxxxxxxxx> 写道： > > From: Alan Huang >> Sent: 20 July 2023 19:54 >> >> I noticed a commit c87a124a5d5e(“net: force a reload of first item in hlist_nulls_for_each_entry_rcu”) >> and a related discussion [1]. > > Hmmm... that was all about the retry loop in ipv4/udp.c > > AFAICT that retry got deleted by ca065d0c. > > That also changes the list from hlist_nulls_xxx to hlist_xxx. > (I'm not sure of the difference) > > This might be why we're seeing unexpected 'port unreachable' messages? > > Quite why that has just started happening is another issue. > Most of the UDP sockets we create aren't 'connected' so I don't > believe they get moved between hash chains - just deleted. > The deletion should leave the hash chain intact. Thanks for the information! :) > > David > > - > Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK > Registration No: 1397386 (Wales)
