On Sat, Feb 24, 2018 at 11:04:52AM -0800, Stephen Hemminger wrote:

This fixes an old bug in iproute2's ss command because it was
reading slabinfo to get statistics. There isn't a better API
to do this, and one can argue that /proc is a UAPI that must
not change.

Therefore this patch set adds a flag to slab to give another
reason to prevent merging, and then uses it in network code.

This is exactly the solution I would have suggested.  Note that SLUB
has always had slab merging, so this tool has been broken since 2.6.22
on any kernel with CONFIG_SLUB.

Reviewed-by: Matthew Wilcox <redacted>

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