1. 27 Jan, 2017 16 commits
  2. 26 Jan, 2017 2 commits
  3. 25 Jan, 2017 1 commit
  4. 23 Jan, 2017 3 commits
    • Markus Elfring's avatar
      cfq-iosched: Adjust one function call together with a variable assignment · 1cf41753
      Markus Elfring authored
      
      
      The script "checkpatch.pl" pointed information out like the following.
      
      ERROR: do not use assignment in if condition
      
      Thus fix the affected source code place.
      Signed-off-by: default avatarMarkus Elfring <elfring@users.sourceforge.net>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      1cf41753
    • Markus Elfring's avatar
      blk-throttle: Adjust two function calls together with a variable assignment · d609af3a
      Markus Elfring authored
      
      
      The script "checkpatch.pl" pointed information out like the following.
      
      ERROR: do not use assignment in if condition
      
      Thus fix the affected source code places.
      Signed-off-by: default avatarMarkus Elfring <elfring@users.sourceforge.net>
      Reviewed-by: default avatarJohannes Thumshirn <jthumshirn@suse.de>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      d609af3a
    • Alexander Potapenko's avatar
      block: Initialize cfqq->ioprio_class in cfq_get_queue() · 4d608baa
      Alexander Potapenko authored
      
      
      KMSAN (KernelMemorySanitizer, a new error detection tool) reports use of
      uninitialized memory in cfq_init_cfqq():
      
      ==================================================================
      BUG: KMSAN: use of unitialized memory
      ...
      Call Trace:
       [<     inline     >] __dump_stack lib/dump_stack.c:15
       [<ffffffff8202ac97>] dump_stack+0x157/0x1d0 lib/dump_stack.c:51
       [<ffffffff813e9b65>] kmsan_report+0x205/0x360 ??:?
       [<ffffffff813eabbb>] __msan_warning+0x5b/0xb0 ??:?
       [<     inline     >] cfq_init_cfqq block/cfq-iosched.c:3754
       [<ffffffff8201e110>] cfq_get_queue+0xc80/0x14d0 block/cfq-iosched.c:3857
      ...
      origin:
       [<ffffffff8103ab37>] save_stack_trace+0x27/0x50 arch/x86/kernel/stacktrace.c:67
       [<ffffffff813e836b>] kmsan_internal_poison_shadow+0xab/0x150 ??:?
       [<ffffffff813e88ab>] kmsan_poison_slab+0xbb/0x120 ??:?
       [<     inline     >] allocate_slab mm/slub.c:1627
       [<ffffffff813e533f>] new_slab+0x3af/0x4b0 mm/slub.c:1641
       [<     inline     >] new_slab_objects mm/slub.c:2407
       [<ffffffff813e0ef3>] ___slab_alloc+0x323/0x4a0 mm/slub.c:2564
       [<     inline     >] __slab_alloc mm/slub.c:2606
       [<     inline     >] slab_alloc_node mm/slub.c:2669
       [<ffffffff813dfb42>] kmem_cache_alloc_node+0x1d2/0x1f0 mm/slub.c:2746
       [<ffffffff8201d90d>] cfq_get_queue+0x47d/0x14d0 block/cfq-iosched.c:3850
      ...
      ==================================================================
      (the line numbers are relative to 4.8-rc6, but the bug persists
      upstream)
      
      The uninitialized struct cfq_queue is created by kmem_cache_alloc_node()
      and then passed to cfq_init_cfqq(), which accesses cfqq->ioprio_class
      before it's initialized.
      Signed-off-by: default avatarAlexander Potapenko <glider@google.com>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      4d608baa
  5. 20 Jan, 2017 1 commit
    • Jens Axboe's avatar
      blk-mq: allow resize of scheduler requests · 70f36b60
      Jens Axboe authored
      
      
      Add support for growing the tags associated with a hardware queue, for
      the scheduler tags. Currently we only support resizing within the
      limits of the original depth, change that so we can grow it as well by
      allocating and replacing the existing scheduler tag set.
      
      This is similar to how we could increase the software queue depth with
      the legacy IO stack and schedulers.
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      Reviewed-by: default avatarOmar Sandoval <osandov@fb.com>
      70f36b60
  6. 19 Jan, 2017 3 commits
  7. 18 Jan, 2017 4 commits
  8. 17 Jan, 2017 10 commits