From: Einar Lueck Date: Tue, 15 Nov 2011 02:31:16 +0000 (+0000) Subject: qeth: Reduce CPU consumption through less SIGA-r calls X-Git-Tag: accepted/tizen/common/20141203.182822~5835^2~24 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0284a0fdf3def1beb4de509f87472520b23883c9;p=platform%2Fkernel%2Flinux-arm64.git qeth: Reduce CPU consumption through less SIGA-r calls Patch avoids SIGA-r calls in case of SIGA-r required. It only calls SIGA-r if a threshold of free buffer is reached. CPU consumption is reduced as a consequence. Signed-off-by: Einar Lueck Signed-off-by: Frank Blaschka Signed-off-by: David S. Miller --- diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h index b77c65e..4abc79d 100644 --- a/drivers/s390/net/qeth_core.h +++ b/drivers/s390/net/qeth_core.h @@ -236,8 +236,7 @@ static inline int qeth_is_ipa_enabled(struct qeth_ipa_info *ipa, #define QETH_IN_BUF_COUNT_MAX 128 #define QETH_MAX_BUFFER_ELEMENTS(card) ((card)->qdio.in_buf_size >> 12) #define QETH_IN_BUF_REQUEUE_THRESHOLD(card) \ - ((card)->ssqd.qdioac1 & AC1_SIGA_INPUT_NEEDED ? 1 : \ - ((card)->qdio.in_buf_pool.buf_count / 2)) + ((card)->qdio.in_buf_pool.buf_count / 2) /* buffers we have to be behind before we get a PCI */ #define QETH_PCI_THRESHOLD_A(card) ((card)->qdio.in_buf_pool.buf_count+1)