Messages in this thread | | | Date | Mon, 2 Aug 2004 19:04:59 -0700 | From | William Lee Irwin III <> | Subject | Re: [patchset] Lockfree fd lookup 0 of 5 |
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On Mon, 2 Aug 2004 14:01:19 -0700 William Lee Irwin III wrote: >> I've found unusual results in this area. e.g. it does appear to matter >> for mapping->tree_lock for database workloads that heavily share a >> given file and access it in parallel. The radix tree walk, though >> intuitively short, is long enough to make the rwlock a win in the >> database-oriented uses and microbenchmarks starting around 4x.
On Mon, Aug 02, 2004 at 04:15:14PM -0700, David S. Miller wrote: > Thanks for the data point, because I had this patch I had sent > to Rusty for 2.7.x which ripped rwlocks entirely out of the > kernel. We might have to toss that idea :-)
In all honesty, I'd rather use RCU, but that's a little more work than most RCU conversions.
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