svn commit: r329521 - head/sys/x86/iommu

[Mark Johnston]

Author: markj
Date: Sun Feb 18 16:03:50 2018
New Revision: 329521
URL: https://svnweb.freebsd.org/changeset/base/329521

Log:
  Don't include DMAR map entry zone items in kernel dumps.
  
  Such items may be allocated in the I/O path used by the dumper,
  potentially causing the dump to fail. Since there is some precedent
  in the DMAR driver for avoiding this problem using _NODUMP, apply
  this workaround to the zone as well.
  
  Reported and tested by:	mmacy
  Reviewed by:	kib
  MFC after:	1 week
  Differential Revision:	https://reviews.freebsd.org/D14422

Modified:
  head/sys/x86/iommu/intel_gas.c

Modified: head/sys/x86/iommu/intel_gas.c
==============================================================================
--- head/sys/x86/iommu/intel_gas.c	Sun Feb 18 15:27:24 2018	(r329520)
+++ head/sys/x86/iommu/intel_gas.c	Sun Feb 18 16:03:50 2018	(r329521)
@@ -81,7 +81,7 @@ intel_gas_init(void)
 
 	dmar_map_entry_zone = uma_zcreate("DMAR_MAP_ENTRY",
 	    sizeof(struct dmar_map_entry), NULL, NULL,
-	    NULL, NULL, UMA_ALIGN_PTR, 0);
+	    NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NODUMP);
 }
 SYSINIT(intel_gas, SI_SUB_DRIVERS, SI_ORDER_FIRST, intel_gas_init, NULL);