Here's a cleanup of the pagetable walkers, in common and i386 code, based on 2.6.11-bk5. Mainly to make them all go the same simpler way, so they're easier to follow with less room for error; but also to reduce the code size and speed it up a little. These are janitorial changes, other arches may follow whenever it suits them.
A few patches slice across all the files, most dice them into nests of functions to focus on: slicing looks confusing where the originals are following different conventions. 11/15 works around hang from 10/15. 329 fewer source lines; ~3.5KB less kernel text; lmbench shows good improvement with 2level pagetables (though not yet back to 2.6.10), and a much less impressive improvement with 3level pagetables: 1*PIII 512MB 2*HT*P4 4GB 2*HT*P4 5GB fork exec sh fork exec sh fork exec sh proc proc proc proc proc proc proc proc proc ---- ---- ---- ---- ---- ---- ---- ---- ---- 152. 541. 3687 249. 989. 4337 353. 1307 5646 2.6.11-bk5 152. 552. 3706 251. 973. 4344 348. 1310 5546 152. 537. 3689 250. 974. 4332 351. 1307 5556 -------------- -------------- -------------- 86.4 438. 3471 199. 865. 4167 334. 1279 5499 2.6.11-bk5 + ptwalk 87.4 413. 3478 198. 910. 4176 333. 1261 5462 87.8 415. 3484 199. 870. 4183 331. 1251 5471 -------------- -------------- -------------- 79.6 389. 3418 174. 800. 3981 226. 1095 5170 2.6.10 81.5 381. 3442 166. 807. 3986 226. 1093 5074 81.1 385. 3471 165. 800. 3978 227. 1101 5154 arch/i386/kernel/vm86.c | 21 arch/i386/mm/ioremap.c | 112 ++--- include/asm-generic/4level-fixup.h | 4 include/asm-generic/pgtable-nopmd.h | 5 include/asm-generic/pgtable-nopud.h | 5 include/asm-generic/pgtable.h | 69 +++ mm/memory.c | 788 ++++++++++++++---------------------- mm/mprotect.c | 131 ++--- mm/mremap.c | 24 - mm/msync.c | 201 +++------ mm/swapfile.c | 173 ++----- mm/vmalloc.c | 246 +++-------- 12 files changed, 725 insertions(+), 1054 deletions(-) Hugh - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
