Date: Sat, 19 Feb 2000 13:53:14 +0100
From: Manfred Spraul <manfreds@colorfullife.com>
I get extremely long hold times for the lru_list lock:
sync_buffers(): up to 14 milliseconds, average 12 milliseconds. [called
10 times per second.]
__invalidate_buffers(): up to 8 milliseconds, average 7 milliseconds.[
called ~4.5 times/sec]
A lock can be held for 2 minutes at a time, this isn't what matters.
Are you seeing "contention" for the lock? That is what matters.
lru_list lock is the longest held mainly because it is the outermost
lock in the buffer cache locking hierarchy.
Later,
David S. Miller
davem@redhat.com
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