This patchset converts the LRU list in the nfsd duplicate reply cache to use the new list_lru infrastrucure. Note that this is based on top of the patch that I sent to Bruce earlier this week that fixes the svc_cacherep direct reclaim bug. I'm sending this as an RFC since I'm not 100% convinced it's an improvement. The majorly unintuitive thing about list_lru that I've found is that you can't call call list_lru_del from list_lru_walk. So, you need different routines to free an object depending on how it's being freed. Using list_lru also means extra spinlocking since we'd be moving to a per-node LRU, but that's probably not a big deal since all of this is done under the cache_lock anyway. In any case, here's what a conversion to list_lru would look like... Discuss! Jeff Layton (3): nfsd: don't try to reuse an expired DRC entry off the list list_lru: add a new LRU_SKIP_REST lru_status value and handling nfsd: convert DRC code to use list_lru fs/nfsd/nfscache.c | 130 +++++++++++++++++++++++++---------------------- include/linux/list_lru.h | 2 + mm/list_lru.c | 4 +- 3 files changed, 75 insertions(+), 61 deletions(-) -- 1.8.4.2 -- 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
