BK kernel workflow
From: Jeff Garzik
Date: Tue Oct 19 2004 - 11:14:02 EST
Although tangential to the problem, I thought LKML and BitMover (and
maybe Andrew or Linus as well) might be interested in a general
description of my workflow.
For net drivers in the Linux kernel, there exists two patch queues,
net-drivers-2.6 and netdev-2.6 (and corresponding 2.4 versions).
net-drivers-2.6 could be described as the "upstream immediately" or "for
Linus" queue, and netdev-2.6 could be described as the "testing" queue.
When receive a patch from some random person on the Internet, fixing a
net driver bug in the "8139too" driver, I do
1) create "topic-specific" repo, if it doesn't already exist
Key point: when dealing with a large number of incoming changes, like I
do, sorting the changes locally into logically separate _sets of
changes_ (one set per repo) has a lot of advantages, given that
BitKeeper doesn't allow changeset "cherrypicking".
cd /spare/repo/netdev-2.6 # not a repo, just a subdir
bk clone -ql ../linux-2.6 8139too
2) move the email containing the patch, in my MUA, to 25_Patches mbox
3) merge the patch into the topic-specific repo, using Linus's patch
importing tools,
cd 8139too && dotest < /garz/nsmail/25_Patches
4) pull the topic-specific repo into "collector" repo, and merge conflicts
cd ALL && bk pull ../8139too
5) build and test 'ALL' repo [heh... usually...]
6) push 'ALL' to external netdev-2.6 repos on gkernel.bkbits.net and
kernel.bkbits.net
7) Andrew's workflow includes automatically pulling netdev-2.6 repo into
his more-experimental "-mm" tree for wider review and testing.
[time passes]
8) Linus and Andrew release the latest and greatest 2.6.N stable release.
9) every day or so, I 'bk pull' a few "topic-specific" repos into a
local clone of net-drivers-2.6, test that, and send it off to Linus/Andrew.
Key point: thanks to the daily snapshots, my changes show up broken up
across several daily snapshots, rather than "one big huge lump of
changes that's been waiting to go in".
cd /spare/repo
bk clone -ql linux-2.6 net-drivers-2.6
bk pull ../netdev-2.6/8139too
bk pull ../netdev-2.6/viro-sparse-annotations
bk pull ../netdev-2.6/janitor
bk pull ../netdev-2.6/misc
bk push && bk push kernel.bkbits.net:net-drivers-2.6
# and then email Linus/Andrew the output of
# bk-make-sum + gcapatch (see Documentation/BK-usage)
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