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  1. 04 8月, 2005 2 次提交
    • L
      Fix up recent get_user_pages() handling · a68d2ebc
      由 Linus Torvalds 提交于 
      The VM_FAULT_WRITE thing is an extra bit, not a valid return value, and
has to be treated as such by get_user_pages().
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      a68d2ebc
    • N
      [PATCH] fix get_user_pages bug · f33ea7f4
      由 Nick Piggin 提交于 
      Checking pte_dirty instead of pte_write in __follow_page is problematic
for s390, and for copy_one_pte which leaves dirty when clearing write.

So revert __follow_page to check pte_write as before, and make
do_wp_page pass back a special extra VM_FAULT_WRITE bit to say it has
done its full job: once get_user_pages receives this value, it no longer
requires pte_write in __follow_page.

But most callers of handle_mm_fault, in the various architectures, have
switch statements which do not expect this new case.  To avoid changing
them all in a hurry, make an inline wrapper function (using the old
name) that masks off the new bit, and use the extended interface with
double underscores.

Yes, we do have a call to do_wp_page from do_swap_page, but no need to
change that: in rare case it's needed, another do_wp_page will follow.
Signed-off-by: NHugh Dickins <hugh@veritas.com>
[ Cleanups by Nick Piggin ]
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      f33ea7f4
  3. 03 8月, 2005 5 次提交
    • H
      [PATCH] Xmon bug fix for soft-reset · 5cb4cc0d
      由 Haren Myneni 提交于 
      For soft reset during system hang, got an error "CPU did not take
control" for some CPUs even though they responded to soft-reset (called
SystemReset, die and called debugger - xmon).   First these CPUs entered
into xmon by IPI callback and then got a soft-reset exception and
re-entered into xmon again. The first CPU which re-entered into xmon got
the output lock and made into xmon successfully without unlocking.
Hence, the next CPU(s) which re-entered into xmon try to acquire a lock
(get_output_lock). Therefore, we can not view state of those CPU(s).

[This is a simple, very low risk, obvious fix for an obvious bug, and
should go into 2.6.13.  -- paulus]
Signed-off-by: NHaren Myneni <hbabu@us.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      5cb4cc0d
    • I
      [PATCH] ACPI: increase PCIBIOS_MIN_IO on x86 · 0b2bfb4e
      由 Ivan Kokshaysky 提交于 
      We have increased PCIBIOS_MIN_IO to 0x4000, but still want
motherboard resources to be allocated properly. So we need
to state 0x1000 (according to the comment) limit explicitely.
Signed-off-by: NIvan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      0b2bfb4e
    • I
      [PATCH] increase PCIBIOS_MIN_IO on x86 · 71db63ac
      由 Ivan Kokshaysky 提交于 
      There is a number of x86 laptops that have some non-PCI IO ports
in the 0x1000-0x1fff range, and it's quite hard to control the correct
order of resource allocation between PCI and other subsystems controlling
these ports. Especially with modular kernel.

So just increase PCIBIOS_MIN_IO to 0x4000 to prevent any new PCI
resource allocations in the problematic range (this limitation must
apply _only_ to the root bus resources - see Linus' change in
pci_bus_alloc_resource).  As PCIBIOS_MIN_IO and PCIBIOS_MIN_CARDBUS_IO
are the same now on i386 and x86-64, we can remove the latter.
Signed-off-by: NIvan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      71db63ac
    • L
      pci: make bus resource start address override minimum IO address · 688d1918
      由 Linus Torvalds 提交于 
      The reason we have PCIBIOS_MIN_IO and PCIBIOS_MIN_CARDBUS_IO is because
we want to protect badly documented motherboard PCI resources and thus
don't want to allocate new resources in low IO/MEM space.

However, if we have already discovered a PCI bridge with a specified
resource base, that should override that decision.

This change will allow us to move the "careful" region upwards without
resulting in problems allocating resources in low mappings.  This was
brought on by us having allocated a bus resource at 0x1000, conflicting
with a undocumented VAIO Sony PI resources.
      688d1918
    • J
      [PATCH] cfq-iosched: fix problem with barriers and max_depth == 1 · d7ed538a
      由 Jens Axboe 提交于 
      CFQ will currently stall when using write barriers and the default
max_depth setting of 1, since we artificially need a depth of 2 when
pre-pending the first flush. So never deny the barrier request going to
the device.

This is a regression since 2.6.12, it was found in SUSE testing.
Signed-off-by: NJens Axboe <axboe@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      d7ed538a
  5. 02 8月, 2005 33 次提交