1. 20 Jul, 2016 1 commit
  2. 15 Jul, 2016 1 commit
  3. 13 Jul, 2016 3 commits
  4. 12 Jul, 2016 1 commit
    • Sebastian Andrzej Siewior's avatar
      fcoe: convert to kworker · 4b9bc86d
      Sebastian Andrzej Siewior authored
      The driver creates its own per-CPU threads which are updated based on
      CPU hotplug events. It is also possible to use kworkers and remove some
      of the kthread infrastrucure.
      
      The code checked ->thread to decide if there is an active per-CPU
      thread. By using the kworker infrastructure this is no longer
      possible (or required). The thread pointer is saved in `kthread' instead
      of `thread' so anything trying to use thread is caught by the
      compiler. Currently only the bnx2fc driver is using struct fcoe_percpu_s
      and the kthread member.
      
      After a CPU went offline, we may still enqueue items on the "offline"
      CPU. This isn't much of a problem. The work will be done on a random
      CPU. The allocated crc_eof_page page won't be cleaned up. It is probably
      expected that the CPU comes up at some point so it should not be a
      problem. The crc_eof_page memory is released of course once the module
      is removed.
      
      This patch was only compile-tested due to -ENODEV.
      
      Cc: Vasu Dev <vasu.dev@intel.com>
      Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com>
      Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
      Cc: Christoph Hellwig <hch@lst.de>
      Cc: fcoe-devel@open-fcoe.org
      Cc: linux-scsi@vger.kernel.org
      Signed-off-by: 's avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
      Tested-by: 's avatarJohannes Thumshirn <jthumshirn@suse.de>
      Reviewed-by: 's avatarJohannes Thumshirn <jthumshirn@suse.de>
      Signed-off-by: 's avatarMartin K. Petersen <martin.petersen@oracle.com>
      4b9bc86d
  5. 15 Apr, 2016 4 commits
  6. 11 Apr, 2016 2 commits
  7. 05 Apr, 2016 1 commit
  8. 04 Apr, 2016 2 commits
  9. 18 Mar, 2016 1 commit
    • Arnd Bergmann's avatar
      scsi: fc: use get/put_unaligned64 for wwn access · ef3fb242
      Arnd Bergmann authored
      A bug in the gcc-6.0 prerelease version caused at least one
      driver (lpfc) to have excessive stack usage when dealing with
      wwn data, on the ARM architecture.
      
      lpfc_scsi.c: In function 'lpfc_find_next_oas_lun':
      lpfc_scsi.c:117:1: warning: the frame size of 1152 bytes is larger than 1024 bytes [-Wframe-larger-than=]
      
      I have reported this as a gcc regression in
      https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70232
      
      However, using a better implementation of wwn_to_u64() not only
      helps with the particular gcc problem but also leads to better
      object code for any version or architecture.
      
      The kernel already provides get_unaligned_be64() and
      put_unaligned_be64() helper functions that provide an
      optimized implementation with the desired semantics.
      
      The lpfc_find_next_oas_lun() function in the example that
      grew from 1146 bytes to 5144 bytes when moving from gcc-5.3
      to gcc-6.0 is now 804 bytes, as the optimized
      get_unaligned_be64() load can be done in three instructions.
      The stack usage is now down to 28 bytes from 128 bytes with
      gcc-5.3 before.
      Signed-off-by: 's avatarArnd Bergmann <arnd@arndb.de>
      Reviewed-by: 's avatarHannes Reinicke <hare@suse.de>
      Reviewed-by: 's avatarEwan Milne <emilne@redhat.com>
      Signed-off-by: 's avatarMartin K. Petersen <martin.petersen@oracle.com>
      ef3fb242
  10. 05 Mar, 2016 1 commit
  11. 23 Feb, 2016 5 commits
  12. 27 Jan, 2016 1 commit
  13. 23 Dec, 2015 1 commit
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  15. 02 Dec, 2015 3 commits
  16. 30 Nov, 2015 1 commit
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  20. 28 Aug, 2015 5 commits
  21. 26 Aug, 2015 1 commit
  22. 03 Aug, 2015 1 commit