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staging: octeon-ethernet: disable load balance for receiving packet when CONFIG_RPS is enabled.

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It's better disable load balance for receiving packet when CONFIG_RPS is enabled.
If not, octeon-ethernet driver select CPU and then the rps select again CPU.
It can be ipi interrupts overhead and packet reordering could be possible.

Signed-off-by: Eunbong Song <eunb.song@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Eunbong Song 2014-10-30 01:09:00 +00:00 committed by Greg Kroah-Hartman
parent 8369e382bd
commit a6a39a7fcf
1 changed files with 2 additions and 0 deletions
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2
drivers/staging/octeon/ethernet-rx.c
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@ -286,6 +286,7 @@ static int cvm_oct_napi_poll(struct napi_struct *napi, int budget)
did_work_request = 1;
}
#ifndef CONFIG_RPS
if (rx_count == 0) {
/*
* First time through, see if there is enough
@ -300,6 +301,7 @@ static int cvm_oct_napi_poll(struct napi_struct *napi, int budget)
if (backlog > budget * cores_in_use && napi != NULL)
cvm_oct_enable_one_cpu();
}
#endif
rx_count++;
skb_in_hw = USE_SKBUFFS_IN_HW && work->word2.s.bufs == 1;