On Sun, May 06, 2018 at 07:48:20AM +1000, NeilBrown wrote: > > The spinlock protects 2 or more buckets. The nested table contains at > least 512 buckets, maybe more. > It is quite possible for two insertions into 2 different buckets to both > get their spinlock and both try to instantiate the same nested table.
I think you missed the fact that when we use nested tables the spin lock table is limited to just a single page and hence corresponds to the first level in the nested table. Therefore it's always safe. Cheers, -- Email: Herbert Xu <herb...@gondor.apana.org.au> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
