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authorEinar Lueck <elelueck@de.ibm.com>2011-11-15 03:31:16 +0100
committerDavid S. Miller <davem@davemloft.net>2011-11-16 23:28:20 +0100
commit0284a0fdf3def1beb4de509f87472520b23883c9 (patch)
tree012a6a380508f4b0214746d147bbc1aba6e32a51 /drivers/s390/net
parentqeth: l3 fix rcu splat in xmit (diff)
downloadlinux-0284a0fdf3def1beb4de509f87472520b23883c9.tar.xz
linux-0284a0fdf3def1beb4de509f87472520b23883c9.zip
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 <elelueck@de.ibm.com> Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390/net')
-rw-r--r--drivers/s390/net/qeth_core.h3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h
index b77c65ed1381..4abc79d3963f 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)