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author | Eric Dumazet <dada1@cosmosbay.com> | 2007-11-15 00:14:05 (GMT) |
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committer | David S. Miller <davem@davemloft.net> | 2007-11-15 00:14:05 (GMT) |
commit | d90bf5a976793edfa88d3bb2393f0231eb8ce1e5 (patch) | |
tree | c664096ffb1f34413ef57e906b38a255bf57edd0 /drivers/net/s2io.c | |
parent | 66ba886254edbbd9442d30f1eef6f6fb0145027d (diff) | |
download | linux-d90bf5a976793edfa88d3bb2393f0231eb8ce1e5.tar.xz |
[NET]: rt_check_expire() can take a long time, add a cond_resched()
On commit 39c90ece7565f5c47110c2fa77409d7a9478bd5b:
[IPV4]: Convert rt_check_expire() from softirq processing to workqueue.
we converted rt_check_expire() from softirq to workqueue, allowing the
function to perform all work it was supposed to do.
When the IP route cache is big, rt_check_expire() can take a long time
to run. (default settings : 20% of the hash table is scanned at each
invocation)
Adding cond_resched() helps giving cpu to higher priority tasks if
necessary.
Using a "if (need_resched())" test before calling "cond_resched();" is
necessary to avoid spending too much time doing the resched check.
(My tests gave a time reduction from 88 ms to 25 ms per
rt_check_expire() run on my i686 test machine)
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/s2io.c')
0 files changed, 0 insertions, 0 deletions