Friday, 27 February 2015

BFS 461, linux-3.19-ck1

Announcing a resync and update of BFS for linux-3.19

BFS by itself:

3.19-sched-bfs-461.patch

-ck branded linux-3.19-ck1 patches:

3.19-ck1 patches

Apart from a resync with mainline and merging of the pending patches that were around for BFS460, there are no new changes. Apologies if I've been unable to address any new issues posted here - as per usual lack of time is the reason. There are some pending changes to the scheduler for mainline (as pointed out by kernelOfTruth here: link) but they're not finalised so I won't be delaying this release to wait for them.

Enjoy!
お楽しみください

Thursday, 11 December 2014

BFS 460, linux-3.18-ck1

Announcing a resync and update of BFS for linux-3.18

BFS by itself:

3.18-sched-bfs-460.patch

-ck branded linux-3.18-ck1 patches:

3.18-ck1 patches

Uncharacteristically I found time to resync up quickly for this latest stable linux release. There are no new BFS features, but there have been a number of changes to stay in sync with mainline. Apart from keeping up with the usual churn in new releases, of which there was a modest amount this time, a number of other low level changes were committed making this much less of a trivial resync so some caution is warranted before blindly updating.

Hilf Danton pointed out a bug in the yield_to code (thanks!) which is now fixed. Since almost nothing uses this code you probably won't notice anything. He also pointed out some other now outdated components in BFS which are also updated. The above_background_load function has also been removed since the VM tweaks in older -cks no longer exist to use it. 

More substantially, I've reworked the plugged I/O code to match mainline now, which I had been reluctant to touch previously because of the deadlocks the unlocking and relocking in the scheduler code path introduced when the the first plugged I/O code made its way into BFS needing iterations of fixes - watch for any I/O misbehaviour/stalls. There are some changes to how mainline responds to idle CPUs so watch for any unusual behaviour there.

Having said that I've been using it for a while and not noticed anything out of the ordinary, but please report back if there are any issues.

Enjoy!
お楽しみください

Tuesday, 18 November 2014

BFS 458, linux-3.17-ck2

This is a bugfix release for the power usage regression as reported here with BFS 457.

BFS by itself:
3.17-sched-bfs-458.patch

CK branded BFS separate and combined patches:
3.17-ck2

Incremental change from BFS 457-458:
bfs457-458.patch

Enjoy!
お楽しみください

Tuesday, 11 November 2014

BFS 457, linux-3.17-ck1

Finally announcing a resync and minor update of BFS for the linux-3.17(.x) kernel releases.

Only minor updates have gone into this release apart from including one of the rework patches by Alfred Chen (thanks!) and the removal of the old KVM workaround that was no longer required with the bugfixes last release courtesy of Graysky (thanks!).

BFS by itself:
3.17-sched-bfs-457.patch

CK branded BFS separate and combined patches:
3.17-ck1

For those interested in the minor changes that made it up to 457, the incremental patches are available:
bfs457-incremental

Enjoy!
お楽しみください