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  1. 15 6月, 2009 2 次提交
  3. 09 6月, 2009 1 次提交
  5. 21 5月, 2009 2 次提交
  7. 15 5月, 2009 1 次提交
    • G
      powerpc/cell: Make ptcal more reliable · 37cd8ed9
      由 Gerhard Stenzel 提交于 
      There have been a series of checkstops on QS21 related to
ptcal being set up incorrectly. On systems that only
have memory on a single node, ptcal fails when it gets
a pointer to memory on the remote node.

Moreover, agressive prefetching in memcpy and other
functions may accidentally touch the first cache line
of the page that we reserve for ptcal, which causes
an ECC checkstop.

We now allocate pages only from the specified node, moves the
ptcal area into the middle of the allocated page to avoid
potential prefetch problems and prints the address of the
ptcal area to facilitate diagnostics.
Signed-off-by: NGerhard Stenzel <gerhard.stenzel@de.ibm.com>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
      37cd8ed9
  9. 28 4月, 2009 1 次提交
  11. 07 4月, 2009 1 次提交
  13. 01 4月, 2009 1 次提交
  15. 24 3月, 2009 3 次提交
  17. 16 3月, 2009 1 次提交
  19. 11 3月, 2009 6 次提交
  21. 23 2月, 2009 5 次提交
  23. 19 2月, 2009 1 次提交
    • I
      timers: add mod_timer_pending() · 74019224
      由 Ingo Molnar 提交于 
      Impact: new timer API

Based on an idea from Martin Josefsson with the help of
Patrick McHardy and Stephen Hemminger:

introduce the mod_timer_pending() API which is a mod_timer()
offspring that is an invariant on already removed timers.

(regular mod_timer() re-activates non-pending timers.)

This is useful for the networking code in that it can
allow unserialized mod_timer_pending() timer-forwarding
calls, but a single del_timer*() will stop the timer
from being reactivated again.

Also while at it:

- optimize the regular mod_timer() path some more, the
  timer-stat and a debug check was needlessly duplicated
  in __mod_timer().

- make the exports come straight after the function, as
  most other exports in timer.c already did.

- eliminate __mod_timer() as an external API, change the
  users to mod_timer().

The regular mod_timer() code path is not impacted
significantly, due to inlining optimizations and due to
the simplifications.

Based-on-patch-from: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: NStephen Hemminger <shemminger@vyatta.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Patrick McHardy <kaber@trash.net>
Cc: netdev@vger.kernel.org
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      74019224
  25. 13 1月, 2009 2 次提交
  27. 12 1月, 2009 1 次提交
  29. 11 1月, 2009 1 次提交
    • Y
      sparseirq: use kstat_irqs_cpu instead · dee4102a
      由 Yinghai Lu 提交于 
      Impact: build fix

Ingo Molnar wrote:

> tip/arch/blackfin/kernel/irqchip.c: In function 'show_interrupts':
> tip/arch/blackfin/kernel/irqchip.c:85: error: 'struct kernel_stat' has no member named 'irqs'
> make[2]: *** [arch/blackfin/kernel/irqchip.o] Error 1
> make[2]: *** Waiting for unfinished jobs....
>

So could move kstat_irqs array to irq_desc struct.

(s390, m68k, sparc) are not touched yet, because they don't support genirq
Signed-off-by: NYinghai Lu <yinghai@kernel.org>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      dee4102a
  31. 09 1月, 2009 1 次提交
  33. 08 1月, 2009 3 次提交
  35. 06 1月, 2009 1 次提交
  37. 26 12月, 2008 1 次提交
  39. 23 12月, 2008 3 次提交
  41. 21 12月, 2008 1 次提交
    • B
      powerpc/mm: Rework usage of _PAGE_COHERENT/NO_CACHE/GUARDED · 64b3d0e8
      由 Benjamin Herrenschmidt 提交于 
      Currently, we never set _PAGE_COHERENT in the PTEs, we just OR it in
in the hash code based on some CPU feature bit.  We also manipulate
_PAGE_NO_CACHE and _PAGE_GUARDED by hand in all sorts of places.

This changes the logic so that instead, the PTE now contains
_PAGE_COHERENT for all normal RAM pages thay have I = 0 on platforms
that need it.  The hash code clears it if the feature bit is not set.

It also adds some clean accessors to setup various valid combinations
of access flags and change various bits of code to use them instead.

This should help having the PTE actually containing the bit
combinations that we really want.

I also removed _PAGE_GUARDED from _PAGE_BASE on 44x and instead
set it explicitely from the TLB miss.  I will ultimately remove it
completely as it appears that it might not be needed after all
but in the meantime, having it in the TLB miss makes things a
lot easier.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: NKumar Gala <galak@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      64b3d0e8
  43. 16 12月, 2008 1 次提交
    • A
      powerpc/cell/axon-msi: Fix MSI after kexec · 23e0e8af
      由 Arnd Bergmann 提交于 
      Commit d015fe99 'powerpc/cell/axon-msi: Retry on missing interrupt'
has turned a rare failure to kexec on QS22 into a reproducible
error, which we have now analysed.

The problem is that after a kexec, the MSIC hardware still points
into the middle of the old ring buffer.  We set up the ring buffer
during reboot, but not the offset into it.  On older kernels, this
would cause a storm of thousands of spurious interrupts after a
kexec, which would most of the time get dropped silently.

With the new code, we time out on each interrupt, waiting for
it to become valid.  If more interrupts come in that we time
out on, this goes on indefinitely, which eventually leads to
a hard crash.

The solution in this commit is to read the current offset from
the MSIC when reinitializing it.  This now works correctly, as
expected.
Reported-by: NDirk Herrendoerfer <d.herrendoerfer@de.ibm.com>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      23e0e8af