From: Ralph Campbell Date: Fri, 6 Jul 2007 19:48:38 +0000 (-0700) Subject: IB/ipath: Lower default number of kernel send buffers X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=37a7e9b7f28fbef4b6abda102fa41c1467f6022f;p=deliverable%2Flinux.git IB/ipath: Lower default number of kernel send buffers The default calculation for the number of send buffers to allocate to the kernel was too high for the PCIe version of the chip thus leaving fewer than desired send buffers for user MPI applications. Signed-off-by: Ralph Campbell Signed-off-by: Roland Dreier --- diff --git a/drivers/infiniband/hw/ipath/ipath_init_chip.c b/drivers/infiniband/hw/ipath/ipath_init_chip.c index 1b1af349f194..fa98aabdf76b 100644 --- a/drivers/infiniband/hw/ipath/ipath_init_chip.c +++ b/drivers/infiniband/hw/ipath/ipath_init_chip.c @@ -737,7 +737,7 @@ int ipath_init_chip(struct ipath_devdata *dd, int reinit) uports = dd->ipath_cfgports ? dd->ipath_cfgports - 1 : 0; if (ipath_kpiobufs == 0) { /* not set by user (this is default) */ - if (piobufs >= (uports * IPATH_MIN_USER_PORT_BUFCNT) + 32) + if (piobufs > 144) kpiobufs = 32; else kpiobufs = 16;