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  1. 27 3月, 2006 2 次提交
    • V
      [PATCH] i386: export: memory more than 4G through /proc/iomem · 10dbe196
      由 Vivek Goyal 提交于 
      Currently /proc/iomem exports physical memory also apart from io device
memory.  But on i386, it truncates any memory more than 4GB.  This leads to
problems for kexec/kdump.

Kexec reads /proc/iomem to determine the system memory layout and prepares a
memory map based on that and passes it to the kernel being kexeced.  Given the
fact that memory more than 4GB has been truncated, new kernel never gets to
see and use that memory.

Kdump also reads /proc/iomem to determine the physical memory layout of the
system and encodes this informaiton in ELF headers.  After a crash new kernel
parses these ELF headers being used by previous kernel and vmcore is prepared
accordingly.  As memory more than 4GB has been truncated, kdump never sees
that memory and never prepares ELF headers for it.  Hence vmcore is truncated
and limited to 4GB even if there is more physical memory in the system.

This patch exports memory more than 4GB through /proc/iomem on i386.
Signed-off-by: NVivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      10dbe196
    • J
      [PATCH] i386: pass proper trap numbers to die chain handlers · 20c0d2d4
      由 Jan Beulich 提交于 
      Pass the trap number causing the call to notify_die() to the die
notification handler chain in a number of instances.  Also, honor the
return value from the handler chain invocation in die() as, through a
debugger, the fault may have been fixed.
Signed-off-by: NJan Beulich <jbeulich@novell.com>
Acked-By: NAndi Kleen <ak@suse.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      20c0d2d4
  3. 26 3月, 2006 8 次提交
  5. 24 3月, 2006 3 次提交
    • A
      [PATCH] kill include/linux/platform.h, default_idle() cleanup · cdb04527
      由 Adrian Bunk 提交于 
      include/linux/platform.h contained nothing that was actually used except
the default_idle() prototype, and is therefore removed by this patch.

This patch does the following with the platform specific default_idle()
functions on different architectures:
- remove the unused function:
  - parisc
  - sparc64
- make the needlessly global function static:
  - arm
  - h8300
  - m68k
  - m68knommu
  - s390
  - v850
  - x86_64
- add a prototype in asm/system.h:
  - cris
  - i386
  - ia64
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Acked-by: NPatrick Mochel <mochel@digitalimplant.org>
Acked-by: NKyle McMartin <kyle@parisc-linux.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      cdb04527
    • A
      [PATCH] more-for_each_cpu-conversions fix · a7201156
      由 Andrew Morton 提交于 
      I screwed up this conversion - we should be iterating across online CPUs, not
possible ones.

Spotted by Joe Perches <joe@perches.com>

Cc: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      a7201156
    • L
      [PATCH] PCI: resource address mismatch · b408cbc7
      由 Linus Torvalds 提交于 
      On Tue, 21 Feb 2006, Ivan Kokshaysky wrote:
> There are two bogus entries in the BIOS memory map table which are
> conflicting with a prefetchable memory range of the AGP bridge:
>
>  BIOS-e820: 00000000fec00000 - 00000000fec01000 (reserved)
>  BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
>
> 0000:00:02.0 PCI bridge: Silicon Integrated Systems [SiS] Virtual PCI-to-PCI bridge (AGP) (prog-if 00 [Normal decode])
> 	Flags: bus master, fast devsel, latency 0
> 	Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
> 	I/O behind bridge: 0000c000-0000cfff
> 	Memory behind bridge: e7e00000-e7efffff
> 	Prefetchable memory behind bridge: fec00000-ffcfffff
> 					   ^^^^^^^^^^^^^^^^^

Yes. However, it's pretty clear that the e820 entries are there for a
reason. Probably they are a hack by the BIOS maintainers to keep Windows
from stomping/moving that region, exactly because they want to keep the
bridge where it is (or, it's actually for the BIOS itself - the BIOS
tables are a horrid mess, and BIOS engineers are pretty hacky people:
they'll add random entries to make their own broken algorithms do the
"right thing").

> Starting from 2.6.13, kernel tries to resolve that sort of conflicts,
> so that prefetch window of the bridge and the framebuffer memory behind
> it get moved to 0x10000000.

I think we could (and probably should) solve this another way: consider
the ACPI "reserved regions" from the e820 map exactly the same way that we
do other ACPI hints - they should restrict _new_ allocations, but not
impact stuff we figure out on our own.

Basically, right now we assign _unassigned_ resources at "fs_initcall"
time. If we were to add in the e820 "reserved region" stuff before that
(but after we've done PCI discovery), we'd probably do the right thing.

Right now we do the e820 reserved regions very early indeed: we call
"register_memory()" from setup_arch(). We could move at least part of it
(the part that registers the resources) down a bit.

Here's a test-patch. I'm not saying we should absolutely do this, but it
might be interesting to try...

Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: <bjk@luxsci.net>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
      b408cbc7
  7. 23 3月, 2006 26 次提交
  9. 22 3月, 2006 1 次提交
    • M
      [PATCH] Uninline sys_mmap common code (reduce binary size) · a7290ee0
      由 Michael Buesch 提交于 
      Remove the inlining of the new vs old mmap system call common code.  This
reduces the size of the resulting vmlinux for defconfig as follows:

mb@pc1:~/develop/git/linux-2.6$ size vmlinux.mmap*
   text    data     bss     dec     hex filename
3303749  521524  186564 4011837  3d373d vmlinux.mmapinline
3303557  521524  186564 4011645  3d367d vmlinux.mmapnoinline

The new sys_mmap2() has also one function call overhead removed, now.
(probably it was already optimized to a jmp before, but anyway...)
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      a7290ee0