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resubmit - [PATCH 0/4] sparsemem intro patches

DISCUSSION Dave Hansen 1 participant 1 message Mar 25, 2005 Memory management

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Dave Hansen

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Andrew, I noticed that these were dropped out of 2.6.12-mm1:

Quoted 8 lines
(quoted diff) +0 -4
-sparsemem-base-teach-discontig-about-sparse-ranges.patch
-sparsemem-base-simple-numa-remap-space-allocator.patch
-sparsemem-base-reorganize-page-flags-bit-operations.patch
-sparsemem-base-early_pfn_to_nid-works-before-sparse-is-initialized.patch

This was breaking compilation in various ways on various architectures.
Returned to manufacturer.

I *think* those problems were caused by the actual sparsemem patches that I posted for RFC, not the base "intro" patches. (I have fixes for the problems that you were hitting with the RFC patches ready, too)

I've run these through a bunch of compile tests, including arm and alpha with and without DISCONTIGMEM, and they seem OK. They also boot just fine on a bunch of ppc64 and i386 configurations.

Can these go back into -mm?

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The following four patches provide the last needed changes before the introduction of sparsemem. For a more complete description of what this will do, please see this patch:

http://www.sr71.net/patches/2.6.11/2.6.11-bk7-mhp1/broken-out/B-sparse-150-sparsemem.patch

or previous posts on the subject:
http://marc.theaimsgroup.com/?t=110868540700001&r=1&w=2
http://marc.theaimsgroup.com/?l=linux-mm&m=109897373315016&w=2

Three of these are i386-only, but one of them reorganizes the macros used to manage the space in page->flags, and will affect all platforms. There are analogous patches to the i386 ones for ppc64, ia64, and x86_64, but those will be submitted by the normal arch maintainers.

The combination of the four patches has been test-booted on a variety of i386 hardware, and compiled for ppc64, i386, and x86-64 with about 17 different .configs. It's also been runtime-tested on ia64 configs (with more patches on top).

-- Dave

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