On Wed, Aug 06, 2014 at 01:44:19PM -0400, Trond Myklebust wrote: > Hi Bruce, > > Rebased onto your nfsd-next branch Thanks, I'm applying these (but won't actually publish that branch till -rc1 is out.) --b. > > Cheers > Trond > > --------------------------- > > Hi Bruce, > > The following patchset is again more an FYI than a must have, but it > addresses a significant scalability problem for NFSv3 when running > over 10GigE and 40GigE networks. At one point, I was seeing >60% CPU > spinning on the DRC global spinlock... > > The one thing to note is that because the statistics are moved outside > spinlocking, then their accuracy is slightly reduced (I do convert the > number of entries into an atomic, so that is still 100% correct). The > right thing to do there is probably to convert those into per-cpu > counters, however I've not had time to do so for now. > > Cheers, > Trond > > Trond Myklebust (6): > nfsd: Clean up drc cache in preparation for global spinlock > elimination > nfsd: convert the lru list into a per-bucket thing > nfsd: Remove the cache_hash list > nfsd: convert num_drc_entries to an atomic_t > nfsd: split DRC global spinlock into per-bucket locks > nfsd: Reorder nfsd_cache_match to check more powerful discriminators > first > > fs/nfsd/cache.h | 1 - > fs/nfsd/nfscache.c | 214 ++++++++++++++++++++++++++++------------------------- > 2 files changed, 113 insertions(+), 102 deletions(-) > > -- > 1.9.3 > -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
