1. 30 7月, 2006 4 次提交
    • J
      [PATCH] x86_64: Calgary IOMMU - Multi-Node NULL pointer dereference fix · d2105b10
      Jon Mason 提交于
      Calgary hits a NULL pointer dereference when booting in a multi-chassis
      NUMA system.  See Redhat bugzilla number 198498, found by Konrad
      Rzeszutek (konradr@redhat.com).
      
      There are many issues that had to be resolved to fix this problem.
      Firstly when I originally wrote the code to handle NUMA systems, I
      had a large misunderstanding that was not corrected until now.  That was
      that I thought the "number of nodes online" referred to number of
      physical systems connected.  So that if NUMA was disabled, there
      would only be 1 node and it would only show that node's PCI bus.
      In reality if NUMA is disabled, the system displays all of the
      connected chassis as one node but is only ignorant of the delays
      in accessing main memory.  Therefore, references to num_online_nodes()
      and MAX_NUMNODES are incorrect and need to be set to the maximum
      number of nodes that can be accessed (which are 8).  I created a
      variable, MAX_NUM_CHASSIS, and set it to 8 to fix this.
      
      Secondly, when walking the PCI in detect_calgary, the code only
      checked the first "slot" when looking to see if a device is present.
      This will work for most cases, but unfortunately it isn't always the
      case.  In the NUMA MXE drawers, there are USB devices present on the
      3rd slot (with slot 1 being empty).  So, to work around this, all
      slots (up to 8) are scanned to see if there are any devices present.
      
      Lastly, the bus is being enumerated on large systems in a different
      way the we originally thought.  This throws the ugly logic we had
      out the window.  To more elegantly handle this, I reorganized the
      kva array to be sparse (which removed the need to have any bus number
      to kva slot logic in tce.c) and created a secondary space array to
      contain the bus number to phb mapping.
      
      With these changes Calgary boots on an x460 with 4 nodes with and
      without NUMA enabled.
      Signed-off-by: NJon Mason <jdmason@us.ibm.com>
      Signed-off-by: NMuli Ben-Yehuda <muli@il.ibm.com>
      Signed-off-by: NAndi Kleen <ak@suse.de>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      d2105b10
    • M
      [PATCH] x86_64: Calgary IOMMU - fix off by one error · 089bbbcb
      Muli Ben-Yehuda 提交于
      Fixed off-by-one error in detect_calgary and calgary_init which will
      cause arrays to overflow.  Also, removed impossible to hit BUG_ON.
      Signed-off-by: NJon Mason <jdmason@us.ibm.com>
      Signed-off-by: NMuli Ben-Yehuda <muli@il.ibm.com>
      Signed-off-by: NAndi Kleen <ak@suse.de>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      089bbbcb
    • A
      [PATCH] x86_64: On Intel systems when CPU has C3 don't use TSC · 0e5f61b0
      Andi Kleen 提交于
      On Intel systems generally the TSC stops in C3 or deeper,
      so don't use it there. Follows similar logic on i386.
      
      This should fix problems on Meroms.
      Signed-off-by: NAndi Kleen <ak@suse.de>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      0e5f61b0
    • A
      [PATCH] x86_64: Update defconfig · 260f659b
      Andi Kleen 提交于
      Update defconfig
      Signed-off-by: NAndi Kleen <ak@suse.de>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      260f659b
  2. 29 7月, 2006 19 次提交
  3. 28 7月, 2006 17 次提交