The patch titled
increase CARDBUS_MEM_SIZE
has been added to the -mm tree. Its filename is
increase-cardbus_mem_size.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: increase CARDBUS_MEM_SIZE
From: Andrew Morton <akpm@xxxxxxxx>
Linus sayeth:
Google knows everything, and finds, on MS own site no less:
"Windows 2000 default resources:
One 4K memory window
One 2 MB memory window
Two 256-byte I/O windows"
which is clearly utterly bogus and insufficient. But Microsoft apparently
realized this, and:
"Windows XP default resources:
Because one memory window of 4K and one window of 2 MB are not
sufficient for CardBus controllers in many configurations, Windows XP
allocates larger memory windows to CardBus controllers where possible.
However, resource windows are static (that is, the operating system
does not dynamically allocate larger memory windows if new devices
appear.) Under Windows XP, CardBus controllers will be assigned the
following resources:
One 4K memory window, as in Windows 2000
64 MB memory, if that amount of memory is available. If 64 MB is not
available the controller will receive 32 MB; if 32 MB is not available,
the controller will receive 16 MB; if 16 MB is not available, the
bridge will receive 8 MB; and so on down to a minimum assignment of 1
MB in configurations where memory is too constrained for the operating
system to provide a larger window.
Two 256-byte I/O windows"
So I think we have our answer. Windows uses one 4k window, and one 64MB
window. And they are no more dynamic than we are (we _could_ try to do it
dynamically, but let's face it, it's fairly painful to dynamically expand
PCI bus resources - you may need to reprogram everything up to the root,
so it would be absolutely crazy to do that unless you have some serious
masochistic tendencies).
So let's just increase our default value to 64M too.
Cc: Markus Rechberger <mrechberger@xxxxxxxxx>
Cc: Daniel Ritz <daniel.ritz@xxxxxx>
Cc: Dominik Brodowski <linux@xxxxxxxxxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/pci/setup-bus.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN drivers/pci/setup-bus.c~increase-cardbus_mem_size drivers/pci/setup-bus.c
--- a/drivers/pci/setup-bus.c~increase-cardbus_mem_size
+++ a/drivers/pci/setup-bus.c
@@ -41,7 +41,7 @@
* have a P2P bridge below a cardbus bridge, we need 4K.
*/
#define CARDBUS_IO_SIZE (256)
-#define CARDBUS_MEM_SIZE (32*1024*1024)
+#define CARDBUS_MEM_SIZE (64*1024*1024)
static void __devinit
pbus_assign_resources_sorted(struct pci_bus *bus)
_
Patches currently in -mm which might be from akpm@xxxxxxxx are
origin.patch
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fix-vm_events_fold_cpu-build-breakage-fix.patch
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macintosh-mangle-caps-lock-events-on-adb-keyboards.patch
git-acpi.patch
sony_apci-resume.patch
sony_apci-resume-fix.patch
video-sysfs-support-take-2-add-dev-argument-for-backlight_device_register-sony_acpi-fix.patch
git-alsa.patch
arm-systemh-build-fix.patch
cifs-sprintf-fix.patch
git-drm.patch
git-gfs2-nmw.patch
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git-libata-all.patch
git-lxdialog-fixup.patch
git-mmc.patch
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git-ubi.patch
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driver-for-silan-sc92031-netdev.patch
update-smc91x-driver-with-arm-versatile-board-info.patch
drivers-net-ns83820c-add-paramter-to-disable-auto.patch
net-use-bitrev8.patch
net-uninline-skb_put.patch
ioat-warning-fix.patch
pci-disable-multithreaded-probing.patch
drivers-scsi-mca_53c9xc-save_flags-cli-removal.patch
scsi-cover-up-bugs-fix-up-compiler-warnings-in-megaraid-driver.patch
git-qla3xxx-fixup.patch
funsoft-is-bust-on-sparc.patch
nokia-e70-is-an-unusual-device.patch
git-wireless.patch
revert-i386-fix-the-verify_quirk_intel_irqbalance.patch
revert-x86_64-mm-add-genapic_force.patch
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revert-x86_64-mm-copy-user-nocache.patch
add-memcpy_uncached_read.patch
touchkit-ps-2-touchscreen-driver.patch
lumpy-reclaim-v2-page_to_pfn-fix.patch
lumpy-reclaim-v2-tidy.patch
nfs-fix-nr_file_dirty-underflow-tidy.patch
avoid-excessive-sorting-of-early_node_map-tidy.patch
swsusp-change-code-ordering-in-userc-sanity.patch
deprecate-smbfs-in-favour-of-cifs.patch
drivers-add-lcd-support-3-Kconfig-fix.patch
drivers-add-lcd-support-workqueue-fixups.patch
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add-retain_initrd-boot-option-tweak.patch
count_vm_events-warning-fix.patch
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procfs-fix-race-between-proc_readdir-and-remove_proc_entry-fix.patch
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gtod-persistent-clock-support-i386.patch
hrtimers-clean-up-locking.patch
hrtimers-add-state-tracking.patch
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time-x86_64-split-x86_64-kernel-timec-up-tidy.patch
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move-page-writeback-acounting-out-of-macros.patch
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omap-gpio-wrappers-tidy.patch
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sched-improve-efficiency-of-sched_fork-tidy.patch
sched2-sched-domain-sysctl-use-ctl_unnumbered.patch
mm-implement-swap-prefetching-use-ctl_unnumbered.patch
swap_prefetch-vs-zoned-counters.patch
add-include-linux-freezerh-and-move-definitions-from-prefetch.patch
readahead-kconfig-options-fix.patch
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readahead-sysctl-parameters.patch
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readahead-context-based-method-locking-fix.patch
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readahead-call-scheme-ifdef-fix.patch
readahead-call-scheme-build-fix.patch
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make-kmem_cache_destroy-return-void-reiser4.patch
reiser4-hardirq-include-fix.patch
reiser4-run-truncate_inode_pages-in-reiser4_delete_inode.patch
reiser4-get_sb_dev-fix.patch
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statistics-infrastructure-fix-buffer-overflow-in-histogram-with-linear-tidy.patch
extend-notifier_call_chain-to-count-nr_calls-made.patch
extend-notifier_call_chain-to-count-nr_calls-made-fixes-2.patch
define-and-use-new-eventscpu_lock_acquire-and-cpu_lock_release-fix.patch
eliminate-lock_cpu_hotplug-in-kernel-schedc-fix.patch
slim-main-include-fix.patch
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device-suspend-debug.patch
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kmap_atomic-debugging.patch
shrink_slab-handle-bad-shrinkers.patch
squash-ipc-warnings.patch
squash-udf-warnings.patch
increase-cardbus_mem_size.patch
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