1. 28 Jun, 2007 17 commits
  2. 27 Jun, 2007 19 commits
  3. 26 Jun, 2007 4 commits
    • Siddha, Suresh B's avatar
      x86_64 irq: use mask/unmask and proper locking in fixup_irqs() · 48d8d7ee
      Siddha, Suresh B authored
      Force irq migration path during cpu offline, is not using proper locks and
      irq_chip mask/unmask routines.  This will result in some races(especially
      the device generating the interrupt can see some inconsistent state,
      resulting in issues like stuck irq,..).
      
      Appended patch fixes the issue by taking proper lock and encapsulating
      irq_chip set_affinity() with a mask() before and an unmask() after.
      
      This fixes a MSI irq stuck issue reported by Darrick Wong.
      
      There are several more general bugs in this area(irq migration in the
      process context). For example,
      
       1. Possibility of missing edge triggered irq.
       2. Reliable method of migrating level triggered irq in the process context.
      
      We plan to look and close these in the near future.
      
      Eric says:
      	In addition even with the fix from Suresh there is still at least one
      	nasty hardware race in fixup_irqs().   However we exercise that code
      	path rarely enough that we are unlikely to hit it in the real world,
      	and that race seems to have existed since the code was merged.  And a
      	fix for that is not coming soon as it is an open investigation area
      	if we can fix irq migration to work outside of irq context or if
      	we have to rework the requirements imposed by the generic cpu hotplug
      	and layer on fixup_irqs().  So this may come up again.
      Signed-off-by: default avatarSuresh Siddha <suresh.b.siddha@intel.com>
      Cc: Eric W. Biederman <ebiederm@xmission.com>
      Reported-and-tested-by: default avatarDarrick Wong <djwong@us.ibm.com>
      Cc: Andi Kleen <ak@suse.de>
      Acked-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      48d8d7ee
    • Suresh Siddha's avatar
      x86_64: set the irq_chip name for lapic · c47e285d
      Suresh Siddha authored
      set the irq_chip name for lapic.
      Signed-off-by: default avatarSuresh Siddha <suresh.b.siddha@intel.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      c47e285d
    • Linus Torvalds's avatar
      Merge master.kernel.org:/home/rmk/linux-2.6-arm · f436ab43
      Linus Torvalds authored
      * master.kernel.org:/home/rmk/linux-2.6-arm:
        [ARM] 4449/1: more entries in arch/arm/boot/.gitignore
        [ARM] 4452/1: Force the literal pool dump before reloc_end
        [ARM] Update show_regs/oops register format
        [ARM] Add support for pause_on_oops and display preempt/smp options
      f436ab43
    • Linus Torvalds's avatar
      Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus · 6cd236e0
      Linus Torvalds authored
      * 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
        [MIPS] Count timer interrupts correctly.
        [MIPS] SMTC and non-SMTC kernel and modules are incompatible
        [MIPS] EMMA2RH: Disable GEN_RTC, it can't possibly work.
        [MIPS] Remove a duplicated local variable in test_and_clear_bit()
        [MIPS] use compat_siginfo in rt_sigframe_n32
        [MIPS] 20K: Handle WAIT related bugs according to errata information
        [MIPS] AP/SP requires shadow registers, auto enable support.
        [MIPS] Fix pb1500 reg B access
        [MIPS] Alchemy: Fix wrong cast
        [MIPS] remove "support for" from system type entry
        [MIPS] add io_map_base to pci_controller on Cobalt
        [MIPS] __ucmpdi2 arguments are unsigned long long.
      6cd236e0