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Change l2arc_norw default to zero

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These days modern SSDs can efficiently service concurrent reads
and writes.  When this flag was added that wasn't really the
case for a variety of SSD controllers.  But now we can set the
default value to take advantage of this parallelism and only
disable this as needed for specific troublesome hardware.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Brian Behlendorf 2013-07-24 09:57:56 -07:00
parent 6e1d7276c9
commit c93504f03a
1 changed files with 1 additions and 1 deletions
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module/zfs/arc.c
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@ -640,7 +640,7 @@ unsigned long l2arc_feed_secs = L2ARC_FEED_SECS; /* interval seconds */
unsigned long l2arc_feed_min_ms = L2ARC_FEED_MIN_MS; /* min interval msecs */ unsigned long l2arc_feed_min_ms = L2ARC_FEED_MIN_MS; /* min interval msecs */
int l2arc_noprefetch = B_TRUE; /* don't cache prefetch bufs */ int l2arc_noprefetch = B_TRUE; /* don't cache prefetch bufs */
int l2arc_feed_again = B_TRUE; /* turbo warmup */ int l2arc_feed_again = B_TRUE; /* turbo warmup */
int l2arc_norw = B_TRUE; /* no reads during writes */ int l2arc_norw = B_FALSE; /* no reads during writes */
/* /*
* L2ARC Internals * L2ARC Internals