Neil Brown wrote:
On Friday December 8, neilb@xxxxxxx wrote:
I have measured very slow write throughput for raid5 as well, though
2.6.18 does seem to have the same problem. I'll double check and do a
git bisect and see what I can come up with.
Correction... it isn't 2.6.18 that fixes the problem. It is compiling
without LOCKDEP or PROVE_LOCKING. I remove those and suddenly a
3 drive raid5 is faster than a single drive rather than much slower.
Bill: Do you have LOCKDEP or PROVE_LOCKING enabled in your .config ??
I have to check tomorrow, I'm using the Fedora kernel (as noted in the
first post on this) rather than one I built, just so others could verify
my results as several have been kind enough to do. Have to run, but I
will check tomorrow or Monday morning early at the latest.
--
bill davidsen <davidsen@xxxxxxx>
CTO TMR Associates, Inc
Doing interesting things with small computers since 1979
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