[ovs-dev] [PATCH] netdev: Retry getting interfaces on inconsistent dumps from kernel

Jiri Benc jbenc at redhat.com
Thu Jul 12 06:44:05 UTC 2018

On Thu, 12 Jul 2018 08:18:43 +0200, Daniel Alvarez wrote:
> This patch in glibc [0] is fixing a bug where we may be getting
> inconsistent dumps from the kernel when listing interfaces due to
> a race condition.
> This could happen if we try to retrieve them while interfaces are
> being added/removed from the system at the same time.
> For systems running against old glibc versions, this patch is retrying
> the operation up to 3 times and then proceeding by logging a
> warning.
> Note that 3 times should be enough to not delay the operation much
> and since it's unlikely that we hit the race condition 3 times in
> a row. Still, if this happened, this patch is not changing the
> current behavior.
> [0] https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=c1f86a33ca32e26a9d6e29fc961e5ecb5e2e5eb4
> Signed-off-by: Daniel Alvarez <dalvarez at redhat.com>
> Signed-off-by: Jiri Benc <jbenc at redhat.com>

Co-authored-by: Jiri Benc <jbenc at redhat.com>

is better in this case :-)

Thanks, Daniel, for following up on this!


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