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  1. 30 11月, 2005 7 次提交
  3. 29 11月, 2005 6 次提交
    • R
      [PATCH] temporarily disable swap token on memory pressure · f7b7fd8f
      由 Rik van Riel 提交于 
      Some users (hi Zwane) have seen a problem when running a workload that
eats nearly all of physical memory - th system does an OOM kill, even
when there is still a lot of swap free.

The problem appears to be a very big task that is holding the swap
token, and the VM has a very hard time finding any other page in the
system that is swappable.

Instead of ignoring the swap token when sc->priority reaches 0, we could
simply take the swap token away from the memory hog and make sure we
don't give it back to the memory hog for a few seconds.

This patch resolves the problem Zwane ran into.
Signed-off-by: NRik van Riel <riel@redhat.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      f7b7fd8f
    • A
      [PATCH] memory_sysdev_class is static · ff88a3b2
      由 Andrew Morton 提交于 
      So don't define it as extern in the header file.

drivers/base/memory.c:28: error: static declaration of 'memory_sysdev_class' follows non-static declaration
include/linux/memory.h:88: error: previous declaration of 'memory_sysdev_class' was here

Cc: Greg KH <greg@kroah.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      ff88a3b2
    • A
      [PATCH] clean up lock_cpu_hotplug() in cpufreq · a9d9baa1
      由 Ashok Raj 提交于 
      There are some callers in cpufreq hotplug notify path that the lowest
function calls lock_cpu_hotplug().  The lock is already held during
cpu_up() and cpu_down() calls when the notify calls are broadcast to
registered clients.

Ideally if possible, we could disable_preempt() at the highest caller and
make sure we dont sleep in the path down in cpufreq->driver_target() calls
but the calls are so intertwined and cumbersome to cleanup.

Hence we consistently use lock_cpu_hotplug() and unlock_cpu_hotplug() in
all places.

 - Removed export of cpucontrol semaphore and made it static.
 - removed explicit uses of up/down with lock_cpu_hotplug()
   so we can keep track of the the callers in same thread context and
   just keep refcounts without calling a down() that causes a deadlock.
 - Removed current_in_hotplug() uses
 - Removed PF_HOTPLUG_CPU in sched.h introduced for the current_in_hotplug()
   temporary workaround.

Tested with insmod of cpufreq_stat.ko, and logical online/offline
to make sure we dont have any hang situations.
Signed-off-by: NAshok Raj <ashok.raj@intel.com>
Cc: Zwane Mwaikambo <zwane@linuxpower.ca>
Cc: Shaohua Li <shaohua.li@intel.com>
Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      a9d9baa1
    • L
      mm: re-architect the VM_UNPAGED logic · 6aab341e
      由 Linus Torvalds 提交于 
      This replaces the (in my opinion horrible) VM_UNMAPPED logic with very
explicit support for a "remapped page range" aka VM_PFNMAP.  It allows a
VM area to contain an arbitrary range of page table entries that the VM
never touches, and never considers to be normal pages.

Any user of "remap_pfn_range()" automatically gets this new
functionality, and doesn't even have to mark the pages reserved or
indeed mark them any other way.  It just works.  As a side effect, doing
mmap() on /dev/mem works for arbitrary ranges.

Sparc update from David in the next commit.
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      6aab341e
    • P
      [MMC] Fix protocol errors · 24117def
      由 Pierre Ossman 提交于 
      A review against MMC/SD specifications found some errors in the current
implementation.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      24117def
    • S
      [ARM] 3181/1: add PORT_ identifier for Hilscher netx uart · f5417612
      由 Sascha Hauer 提交于 
      Patch from Sascha Hauer

This patch adds PORT_NETX for supporting the Hilscher netx embedded
UARTs.
Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      f5417612
  5. 24 11月, 2005 2 次提交
  7. 23 11月, 2005 5 次提交
    • L
      compat-ioctl.c: fix compile with no CONFIG_JBD · 1778d55e
      由 Linus Torvalds 提交于 
      The ext3 compat-ioctl translation wants to translate data structures
that <linux/jbd.h> only declared when CONFIG_JBD was enabled.

So make <linux/jbd.h> play nicely even when we don't actually end up
using it.
Acked-by: NAndrew Morton <akpm@osdl.org>
Acked-by: NJeffrey Hundstad <jeffrey.hundstad@mnsu.edu>
Acked-by: NZan Lynx <zlynx@acm.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      1778d55e
    • L
      Fix up GFP_ZONEMASK for GFP_DMA32 usage · ac3461ad
      由 Linus Torvalds 提交于 
      There was some confusion about the different zone usage, this should fix
up the resulting mess in the GFP zonemask handling.

The different zone usage is still confusing (it's very easy to mix up
the individual zone numbers with the GFP zone _list_ numbers), so we
might want to clean up some of this in the future, but in the meantime
this should fix the actual problems.
Acked-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      ac3461ad
    • R
      [NET]: Shut up warnings in net/core/flow.c · af2b4079
      由 Russell King 提交于 
      Not really a network problem, more a !SMP issue.

net/core/flow.c:295: warning: statement with no effect

flow.c:295:        smp_call_function(flow_cache_flush_per_cpu, &info, 1, 0);

Fix this by converting the macro to an inline function, which
also increases the typechecking for !SMP builds.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      af2b4079
    • H
      [PATCH] unpaged: VM_UNPAGED · 0b14c179
      由 Hugh Dickins 提交于 
      Although we tend to associate VM_RESERVED with remap_pfn_range, quite a few
drivers set VM_RESERVED on areas which are then populated by nopage.  The
PageReserved removal in 2.6.15-rc1 changed VM_RESERVED not to free pages in
zap_pte_range, without changing those drivers not to set it: so their pages
just leak away.

Let's not change miscellaneous drivers now: introduce VM_UNPAGED at the core,
to flag the special areas where the ptes may have no struct page, or if they
have then it's not to be touched.  Replace most instances of VM_RESERVED in
core mm by VM_UNPAGED.  Force it on in remap_pfn_range, and the sparc and
sparc64 io_remap_pfn_range.

Revert addition of VM_RESERVED to powerpc vdso, it's not needed there.  Is it
needed anywhere?  It still governs the mm->reserved_vm statistic, and special
vmas not to be merged, and areas not to be core dumped; but could probably be
eliminated later (the drivers are probably specifying it because in 2.4 it
kept swapout off the vma, but in 2.6 we work from the LRU, which these pages
don't get on).

Use the VM_SHM slot for VM_UNPAGED, and define VM_SHM to 0: it serves no
purpose whatsoever, and should be removed from drivers when we clean up.
Signed-off-by: NHugh Dickins <hugh@veritas.com>
Acked-by: NWilliam Irwin <wli@holomorphy.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      0b14c179
    • H
      [PATCH] unpaged: unifdefed PageCompound · 664beed0
      由 Hugh Dickins 提交于 
      It looks like snd_xxx is not the only nopage to be using PageReserved as a way
of holding a high-order page together: which no longer works, but is masked by
our failure to free from VM_RESERVED areas.  We cannot fix that bug without
first substituting another way to hold the high-order page together, while
farming out the 0-order pages from within it.

That's just what PageCompound is designed for, but it's been kept under
CONFIG_HUGETLB_PAGE.  Remove the #ifdefs: which saves some space (out- of-line
put_page), doesn't slow down what most needs to be fast (already using
hugetlb), and unifies the way we handle high-order pages.
Signed-off-by: NHugh Dickins <hugh@veritas.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      664beed0
  9. 21 11月, 2005 4 次提交
  11. 20 11月, 2005 7 次提交
  13. 19 11月, 2005 3 次提交
  15. 18 11月, 2005 3 次提交
  17. 16 11月, 2005 2 次提交
  19. 15 11月, 2005 1 次提交