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Message-Id: <20210304205515.34262-1-aahringo@redhat.com> Date: Thu, 4 Mar 2021 15:55:15 -0500 From: Alexander Aring <aahringo@...hat.com> To: pablo@...filter.org Cc: fw@...len.de, netdev@...r.kernel.org, teigland@...hat.com Subject: [PATCH] netlink.7: note not reliable if NETLINK_NO_ENOBUFS This patch adds a note to the netlink manpage that if NETLINK_NO_ENOBUFS is set there is no additional handling to make netlink reliable. It just disables the error notification. The used word "avoid" receiving ENOBUFS errors can be interpreted that netlink tries to do some additional queue handling to avoid that such scenario occurs at all, e.g. like zerocopy which tries to avoid memory copy. However disable is not the right word here as well that in some cases ENOBUFS can be still received. This patch makes clear that there will no additional handling to put netlink in a more reliable mode. Signed-off-by: Alexander Aring <aahringo@...hat.com> --- man7/netlink.7 | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/man7/netlink.7 b/man7/netlink.7 index c69bb62bf..2cb0d1a55 100644 --- a/man7/netlink.7 +++ b/man7/netlink.7 @@ -478,7 +478,7 @@ errors. .\" Author: Pablo Neira Ayuso <pablo@...filter.org> This flag can be used by unicast and broadcast listeners to avoid receiving .B ENOBUFS -errors. +errors. Note it does not turn netlink into any kind of more reliable mode. .TP .BR NETLINK_LISTEN_ALL_NSID " (since Linux 4.2)" .\" commit 59324cf35aba5336b611074028777838a963d03b -- 2.26.2
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