Hi, Andrew
On Thu, 06 Apr 2006 21:20:26 -0700
[email protected] wrote:
>
> The patch titled
>
> PG_uncached is ia64 only
>
> has been added to the -mm tree. Its filename is
>
> pg_uncached-is-ia64-only.patch
>
> See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
> out what to do about this
>
in include/linux/mmzone.h
==
#elif BITS_PER_LONG == 64
/*
* with 64 bit flags field, there's plenty of room.
*/
#define FLAGS_RESERVED 32
#else
==
it looks this is used here.
#if SECTIONS_WIDTH+NODES_WIDTH+ZONES_WIDTH > FLAGS_RESERVED
#error SECTIONS_WIDTH+NODES_WIDTH+ZONES_WIDTH > FLAGS_RESERVED
#endif
I'm not sure but please compile check FLAGS_RESRVED with SPARSEMEM or
just
#if (BITS_PER_LONG > 32) /* 64-bit only flags. we can use full
low 32bits */
#define PG_uncached 31
#endif
Hm..Is this ugly ? :(
-Kame
>
> From: Andrew Morton <[email protected]>
>
> As Nick points out, only ia64 uses PG_uncached. So we can push it up into the
> higher 32-bits of page->flgs and make room for another flag on 32-bit
> machines.
>
> Cc: "Luck, Tony" <[email protected]>
> Cc: Jesse Barnes <[email protected]>
> Cc: Jes Sorensen <[email protected]>
> Cc: Nick Piggin <[email protected]>
> Signed-off-by: Andrew Morton <[email protected]>
> ---
>
> include/linux/page-flags.h | 7 ++++++-
> 1 files changed, 6 insertions(+), 1 deletion(-)
>
> diff -puN include/linux/page-flags.h~pg_uncached-is-ia64-only include/linux/page-flags.h
> --- devel/include/linux/page-flags.h~pg_uncached-is-ia64-only 2006-04-06 21:17:16.000000000 -0700
> +++ devel-akpm/include/linux/page-flags.h 2006-04-06 21:18:31.000000000 -0700
> @@ -7,6 +7,8 @@
>
> #include <linux/percpu.h>
> #include <linux/cache.h>
> +
> +#include <asm/types.h>
> #include <asm/pgtable.h>
>
> /*
> @@ -86,7 +88,10 @@
> #define PG_mappedtodisk 16 /* Has blocks allocated on-disk */
> #define PG_reclaim 17 /* To be reclaimed asap */
> #define PG_nosave_free 18 /* Free, should not be written */
> -#define PG_uncached 19 /* Page has been mapped as uncached */
> +
> +#if (BITS_PER_LONG > 32)
> +#define PG_uncached 32 /* Page has been mapped as uncached */
> +#endif
>
> /*
> * Global page accounting. One instance per CPU. Only unsigned longs are
> _
>
> Patches currently in -mm which might be from [email protected] are
>
> select-warning-fixes.patch
> config_net=n-build-fix.patch
> git-acpi.patch
> acpi-update-asus_acpi-driver-registration-fix.patch
> acpi-memory-hotplug-cannot-manage-_crs-with-plural-resoureces.patch
> catch-notification-of-memory-add-event-of-acpi-via-container-driver-register-start-func-for-memory-device.patch
> catch-notification-of-memory-add-event-of-acpi-via-container-driveravoid-redundant-call-add_memory.patch
> sony_apci-resume.patch
> powernow-k8-crash-workaround.patch
> git-drm.patch
> bt866-build-fix.patch
> connector-exports.patch
> git-ia64.patch
> git-libata-all.patch
> pci-error-recovery-e1000-network-device-driver.patch
> pcmcia-remove-unneeded-forward-declarations.patch
> git-scsi-misc.patch
> megaraid-unused-variable.patch
> git-sas-jg.patch
> git-sas-jg-build-hack.patch
> git-watchdog.patch
> arm-add_memory-build-fix.patch
> acx1xx-wireless-driver.patch
> ext3-ext3-in-kernel-block-number-type-fixes-fix.patch
> sync_file_range-use-unsigned-for-flags.patch
> timer-initialisation-fix.patch
> timer-initialisation-fix-tidy.patch
> s3c24xx-gpio-led-support-tidy.patch
> make-tty_insert_flip_string_flags-a-non-gpl-export.patch
> prune_one_dentry-tweaks.patch
> sys_kexec_load-naming-fixups.patch
> hangcheck-remove-monotomic_clock-on-x86.patch
> knfsd-nfsd4-limit-number-of-delegations-handed-out-fix.patch
> pi-futex-futex-code-cleanups-fix.patch
> reiser4.patch
> kgdb-core-lite-add-reboot-command.patch
> kgdb-8250-fix.patch
> nr_blockdev_pages-in_interrupt-warning.patch
> device-suspend-debug.patch
> revert-tty-buffering-comment-out-debug-code.patch
> slab-leaks3-default-y.patch
> x86-kmap_atomic-debugging.patch
> pg_uncached-is-ia64-only.patch
>
> -
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