svn commit: r362003 - head/sys/powerpc/powernv

[Justin Hibbits]

Author: jhibbits
Date: Wed Jun 10 04:08:16 2020
New Revision: 362003
URL: https://svnweb.freebsd.org/changeset/base/362003

Log:
  powerpc/powernv: Don't use the vmem quantum cache for OPAL PCI MSI allocations
  
  vmem quantum cache is only needed when doing a lot of concurrent allocations,
  which doesn't happen when allocating MSIs.  This wastes memory for the cache
  zones.  Avoid this waste and don't use the quantum cache.
  
  Reported by:	markj

Modified:
  head/sys/powerpc/powernv/opal_pci.c

Modified: head/sys/powerpc/powernv/opal_pci.c
==============================================================================
--- head/sys/powerpc/powernv/opal_pci.c	Wed Jun 10 04:04:59 2020	(r362002)
+++ head/sys/powerpc/powernv/opal_pci.c	Wed Jun 10 04:08:16 2020	(r362003)
@@ -427,7 +427,7 @@ opalpci_attach(device_t dev)
 		sc->msi_base = msi_ranges[0];
 
 		sc->msi_vmem = vmem_create("OPAL MSI", msi_ranges[0],
-		    msi_ranges[1], 1, 16, M_BESTFIT | M_WAITOK);
+		    msi_ranges[1], 1, 0, M_BESTFIT | M_WAITOK);
 
 		sc->base_msi_irq = powerpc_register_pic(dev,
 		    OF_xref_from_node(node),