Change Details

Compiles, boots, passes simple tests. Passes a 13-hour test by Peter Holm. A performance test suggested by alc (adding write protection to all the even-numbered pages in a gigabyte when the odd-numbers pages have it, produces these results in 12 trials. Without this patch: time 0.23 time 0.25 time 0.23 time 0.22 time 0.23 time 0.25 time 0.23 time 0.23 time 0.24 time 0.23 time 0.23 time 0.22 With this patch: time 0.21 time 0.21 time 0.21 time 0.21 time 0.24 time 0.20 time 0.20 time 0.28 time 0.20 time 0.21 time 0.21 time 0.20 Then I ran 12 more, and none of them were more than 0.22. I've uploaded the test program that produced these results. {F4914298}

Compiles, boots, passes simple tests. Stress testing by Peter Holm was performed on a much different patch, and those tests need to be repeated. A performance test {F5078236} run 10 times with and without this change produces these results. Without: time 0.31 time 0.26 time 0.26 time 0.26 time 0.27 time 0.30 time 0.28 time 0.30 time 0.28 time 0.28 With: time 0.27 time 0.27 time 0.26 time 0.25 time 0.26 time 0.26 time 0.26 time 0.26 time 0.27 time 0.26

Compiles, boots, passes simple tests. Passes a 13-hourStress testing by Peter Holm was performed on a much different patch, and those test by Peter Holms need to be repeated. A performance test suggested by alc (adding write protection to all the even-numbered pages in a gigabyte when the odd-numbers pages have it, produces these results in 12 trials. Without this patch: time 0.23{F5078236} run 10 times with and without this change produces these results. Without: time 0.2531 time 0.2326 time 0.2226 time 0.2326 time 0.2527 time 0.2330 time 0.2328 time 0.2430 time 0.2328 time 0.23 time 0.2228 With this patch: time 0.2127 time 0.2127 time 0.2126 time 0.2125 time 0.2426 time 0.2026 time 0.2026 time 0.2826 time 0.2027 time 0.2126 time 0.21 time 0.20 Then I ran 12 more, and none of them were more than 0.22. I've uploaded the test program that produced these results. {F4914298}