BFS 424, linux-3.4-ck3

As seen on this blog previously, a bug showed up in 3.4-ck2/BFS 423 to do with unplugged I/O management that would lead to severe stalls/hangs. I'm releasing BFS 424 officially and upgrading 3.4-ck2 to 3.4-ck3, incorporating just this one change.

BFS 424:
3.4-sched-bfs-424.patch

3.4-ck3:
3.4-ck3/


Others on -ck2 can simply apply the incremental patch to be up to date.
3.4bfs423-424.patch

Enjoy!
お楽しみください

BFS 424 test

A couple of bug reports mostly related to disk I/O seem to have cropped up with BFS 423/3.4-ck2. The likely culprit seems to be the plugged I/O management within schedule() that I modified going from BFS 420 to BFS 423, when I adopted mainline's approach to managing the plugged I/O. It appears that the mechanism I had put in place for BFS was the correct one, and mainline's approach does not work (for BFS) so I've backed out that change and increased the version number. Here is the test patch:

bfs423-424.patch

Those with issues of any sort related to BFS 423 or ck2, please test this patch on top of the previous BFS patched kernel. Thanks!

bfs 0.423, 3.4-ck2

A couple of issues showed up with BFS 0.422, one being the "0 load" bug and the other being a build issue on non-hotplug releases. So here is BFS 0.423 and 3.4-ck2 (which is just ck1 with the BFS update) which should fix those:

3.4-sched-bfs-423.patch

3.4-ck2/

and the increment only:

3.4bfs422-423.patch

Enjoy!
お楽しみください

BFS 0.422, 3.4.0-ck1

Announcing the release of BFS for 3.4, along with the complete -ck1 patch.

BFS alone:
3.4-sched-bfs-422.patch

Full 3.4-ck1 patches:
3.4-ck1

Alas I was unable to keep the 420 number for BFS due to a number of minor changes. I also incremented the number beyond the unofficial 421 patch put to lkml so there was no confusion. The only changes are that some trivial display accounting fixes were added, along with forcing SLUB in the config by default as other SLAB allocators crash with BFS (you should all be using SLUB anyway). The rest of the BFS changes are a resync with the new code going into linux 3.4, along with more merging of code from mainline into BFS where suitable. Note that I have adopted the mainline approach of dealing with unplugged I/O. Previously I had spent a lot of time making it work with BFS for those who remember that period of instability, so hopefully the mainline approach will work seamlessly now (since mainline ended up having the same bug but it was harder to reproduce).

3.4-ck1 is just a resync of the remainder of the patches from 3.3-ck1.

Enjoy!
お楽しみください

EDIT: If you build on SMP without enabling CPU hotplug you will need this patch on top for BFS to build:
bfs422-nohotplug_fix.patch