Author: mav
Date: Thu Feb 28 15:36:03 2019
New Revision: 344661
URL: https://svnweb.freebsd.org/changeset/base/344661
Log:
Limit 24xx adapters to only one MSI-X interrupt by default.
These are 4Gb/s and pretty old and slow now, so I see no reason to fight
for their performance over stability.
PR: 233654
MFC after: 1 week
Sponsored by: iXsystems, Inc.
Modified:
head/sys/dev/isp/isp_pci.c
Modified: head/sys/dev/isp/isp_pci.c
==============================================================================
--- head/sys/dev/isp/isp_pci.c Thu Feb 28 15:24:00 2019 (r344660)
+++ head/sys/dev/isp/isp_pci.c Thu Feb 28 15:36:03 2019 (r344661)
@@ -1910,7 +1910,7 @@ isp_pci_irqsetup(ispsoftc_t *isp)
ISP_UNLOCK(isp);
if (ISP_CAP_MSIX(isp)) {
- max_irq = IS_26XX(isp) ? 3 : 2;
+ max_irq = IS_26XX(isp) ? 3 : (IS_25XX(isp) ? 2 : 1);
resource_int_value(device_get_name(dev),
device_get_unit(dev), "msix", &max_irq);
max_irq = imin(ISP_MAX_IRQS, max_irq);
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