Messages in this thread | | | From | Andi Kleen <> | Subject | Re: [PATCH v4 0/3] ext4: increase mbcache scalability | Date | Fri, 24 Jan 2014 13:38:58 -0800 |
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T Makphaibulchoke <tmac@hp.com> writes:
> The patch consists of three parts. > > The first part changes the implementation of both the block and hash chains of > an mb_cache from list_head to hlist_bl_head and also introduces new members, > including a spinlock to mb_cache_entry, as required by the second part.
spinlock per entry is usually overkill for larger hash tables.
Can you use a second smaller lock table that just has locks and is indexed by a subset of the hash key. Most likely a very small table is good enough.
Also I would be good to have some data on the additional memory consumption.
-Andi
-- ak@linux.intel.com -- Speaking for myself only
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