Re: 2.6.29-rc8-git5: Reported regressions from 2.6.28

Ingo Molnar
2009-03-21T20:05:34Z

* Rafael J. Wysocki <rjw@sisk.pl> wrote:

> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12809
> Subject : iozone regression with 2.6.29-rc6
> Submitter : Lin Ming <ming.m.lin@intel.com>
> Date : 2009-02-27 9:13 (23 days old)
> First-Bad-Commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=1cf6e7d83bf334cc5916137862c920a97aabc018
> References : http://marc.info/?l=linux-kernel&m=123572630504360&w=4
> http://lkml.org/lkml/2009/3/14/265
> Handled-By : Wu Fengguang <fengguang.wu@intel.com>

I think this was tracked back to the effective halving of
dirty_ratio by 1cf6e7d83 ("mm: task dirty accounting fix") and
doubling the ratio fixed the iozone regression.

> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12800
> Subject : x86 PAT invalid vm_insert_pfn assumptions
> Submitter : Thomas Hellstrom <thellstrom@vmware.com>
> Date : 2009-03-02 01:40 (20 days old)

fix queued up for .30:

895791d: VM, x86, PAT: add a new vm flag to track full pfnmap at mmap
4bb9c5c: VM, x86, PAT: Change is_linear_pfn_mapping to not use vm_pgoff

> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12763
> Subject : Different cpu MHz values for processor0 and processor1
> Submitter : Matthew A. Bockol <mbockol@carleton.edu>
> Date : 2009-02-21 5:42 (29 days old)
> References : http://marc.info/?l=linux-kernel&m=123519687807246&w=4

first-bad-commit:

d96f94c: ACPI: Enable bit 11 in _PDC to advertise hw coord

Ingo