1. 22 7月, 2015 1 次提交
  2. 17 4月, 2014 1 次提交
  3. 21 2月, 2014 1 次提交
    • P
      s390/cio: Fix missing subchannels after CHPID configure on · 9955e8d1
      Peter Oberparleiter 提交于
      Performing a Channel-Path configure on operation on a Channel-Path ID
      (CHPID) does not trigger a scan for subchannels that might have become
      available through that CHPID. As a result, some subchannels and
      associated I/O devices might be missing. Fix this by adding the missing
      scan.
      
      This problem was introduced by commit c820de39, "[S390] cio: Rework
      css driver.", but wasn't noticed earlier because the machine usually
      also generates a Channel-Report-Word when the first CHPID of a
      subchannel is configured on, resulting in a separate scan for that
      subchannel. The problem only becomes apparent when this first CHPID is
      not working properly and additional working CHPIDs are subsequently
      configured on without any effect on the availability of the affected
      subchannel.
      Reviewed-by: NSebastian Ott <sebott@linux.vnet.ibm.com>
      Signed-off-by: NPeter Oberparleiter <oberpar@linux.vnet.ibm.com>
      Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
      9955e8d1
  4. 16 1月, 2014 1 次提交
  5. 14 1月, 2014 1 次提交
  6. 16 12月, 2013 1 次提交
    • P
      s390/cio: More efficient handling of CHPID availability events · 449666dd
      Peter Oberparleiter 提交于
      The CIO layer processes hardware events that indicate that a channel
      path has become available by performing a scan of available subchannels
      using the Store Subchannel (STSCH) instruction. Performing too many
      STSCH instructions in a tight loop can cause high Hypervisor overhead
      which can negatively impact the performance of the virtual machine as
      a whole.
      
      This patch reduces the number of STSCH instructions performed while
      processing a resource accessibility event and while varying a CHPID
      online.
      
      In both cases, Linux first performs a STSCH instruction on each unused
      subchannel to see if the subchannel has become available. If the STSCH
      instruction indicates that the subchannel is available, a full
      evaluation of this subchannel is scheduled. Since the full evaluation
      includes performing a STSCH instruction, the initial STSCH is
      unnecessary and can be removed.
      Signed-off-by: NPeter Oberparleiter <oberpar@linux.vnet.ibm.com>
      Reviewed-by: NSebastian Ott <sebott@linux.vnet.ibm.com>
      Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
      449666dd
  7. 27 6月, 2013 2 次提交
  8. 17 4月, 2013 1 次提交
  9. 07 3月, 2013 1 次提交
  10. 14 2月, 2013 1 次提交
  11. 16 1月, 2013 1 次提交
  12. 01 12月, 2012 1 次提交
  13. 26 9月, 2012 2 次提交
  14. 20 7月, 2012 1 次提交
    • H
      s390/comments: unify copyright messages and remove file names · a53c8fab
      Heiko Carstens 提交于
      Remove the file name from the comment at top of many files. In most
      cases the file name was wrong anyway, so it's rather pointless.
      
      Also unify the IBM copyright statement. We did have a lot of sightly
      different statements and wanted to change them one after another
      whenever a file gets touched. However that never happened. Instead
      people start to take the old/"wrong" statements to use as a template
      for new files.
      So unify all of them in one go.
      Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
      a53c8fab
  15. 01 12月, 2011 1 次提交
  16. 23 5月, 2011 1 次提交
  17. 05 1月, 2011 1 次提交
  18. 25 10月, 2010 5 次提交
  19. 10 8月, 2010 1 次提交
  20. 19 7月, 2010 1 次提交
  21. 22 4月, 2010 1 次提交
  22. 27 2月, 2010 1 次提交
  23. 16 6月, 2009 1 次提交
  24. 26 3月, 2009 2 次提交
  25. 25 12月, 2008 1 次提交
  26. 17 7月, 2008 1 次提交
  27. 14 7月, 2008 5 次提交
  28. 17 4月, 2008 2 次提交
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