1. 04 Feb, 2015 5 commits
  2. 03 Feb, 2015 1 commit
  3. 30 Jan, 2015 5 commits
  4. 28 Jan, 2015 2 commits
    • Mike Galbraith's avatar
      sched: Fix crash if cpuset_cpumask_can_shrink() is passed an empty cpumask · bb2bc55a
      Mike Galbraith authored
      While creating an exclusive cpuset, we passed cpuset_cpumask_can_shrink()
      an empty cpumask (cur), and dl_bw_of(cpumask_any(cur)) made boom with it:
      
       CPU: 0 PID: 6942 Comm: shield.sh Not tainted 3.19.0-master #19
       Hardware name: MEDIONPC MS-7502/MS-7502, BIOS 6.00 PG 12/26/2007
       task: ffff880224552450 ti: ffff8800caab8000 task.ti: ffff8800caab8000
       RIP: 0010:[<ffffffff81073846>]  [<ffffffff81073846>] cpuset_cpumask_can_shrink+0x56/0xb0
       [...]
       Call Trace:
        [<ffffffff810cb82a>] validate_change+0x18a/0x200
        [<ffffffff810cc877>] cpuset_write_resmask+0x3b7/0x720
        [<ffffffff810c4d58>] cgroup_file_write+0x38/0x100
        [<ffffffff811d953a>] kernfs_fop_write+0x12a/0x180
        [<ffffffff8116e1a3>] vfs_write+0xb3/0x1d0
        [<ffffffff8116ed06>] SyS_write+0x46/0xb0
        [<ffffffff8159ced6>] system_call_fastpath+0x16/0x1b
      Signed-off-by: default avatarMike Galbraith <umgwanakikbuti@gmail.com>
      Acked-by: default avatarZefan Li <lizefan@huawei.com>
      Fixes: f82f8042 ("sched/deadline: Ensure that updates to exclusive cpusets don't break AC")
      Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Link: http://lkml.kernel.org/r/1422417235.5716.5.camel@marge.simpson.netSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      bb2bc55a
    • Jan Beulich's avatar
      sched/fair: Avoid using uninitialized variable in preferred_group_nid() · 81907478
      Jan Beulich authored
      At least some gcc versions - validly afaict - warn about potentially
      using max_group uninitialized: There's no way the compiler can prove
      that the body of the conditional where it and max_faults get set/
      updated gets executed; in fact, without knowing all the details of
      other scheduler code, I can't prove this either.
      
      Generally the necessary change would appear to be to clear max_group
      prior to entering the inner loop, and break out of the outer loop when
      it ends up being all clear after the inner one. This, however, seems
      inefficient, and afaict the same effect can be achieved by exiting the
      outer loop when max_faults is still zero after the inner loop.
      
      [ mingo: changed the solution to zero initialization: uninitialized_var()
        needs to die, as it's an actively dangerous construct: if in the future
        a known-proven-good piece of code is changed to have a true, buggy
        uninitialized variable, the compiler warning is then supressed...
      
        The better long term solution is to clean up the code flow, so that
        even simple minded compilers (and humans!) are able to read it without
        getting a headache.  ]
      Signed-off-by: default avatarJan Beulich <jbeulich@suse.com>
      Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Link: http://lkml.kernel.org/r/54C2139202000078000588F7@mail.emea.novell.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      81907478
  5. 27 Jan, 2015 1 commit
    • Linus Torvalds's avatar
      Merge branch 'akpm' (patches from Andrew Morton) · 4adca1cb
      Linus Torvalds authored
      Merge misc fixes from Andrew Morton:
       "Six fixes"
      
      * emailed patches from Andrew Morton <akpm@linux-foundation.org>:
        drivers/rtc/rtc-s5m.c: terminate s5m_rtc_id array with empty element
        printk: add dummy routine for when CONFIG_PRINTK=n
        mm/vmscan: fix highidx argument type
        memcg: remove extra newlines from memcg oom kill log
        x86, build: replace Perl script with Shell script
        mm: page_alloc: embed OOM killing naturally into allocation slowpath
      4adca1cb
  6. 26 Jan, 2015 18 commits
  7. 24 Jan, 2015 8 commits