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Notes
Wed, 05 Sep 2007
Added KS photos.
Two albums - flight to the London and views from the plain,
and Linux kernel summit attendees - set of photos from
the meeting.
All are awailable in gallery.
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Everyone likes to create a new userspace API and generally
no one can make this really good (at least for the first turn).
Michel showed us how bad some errors in this area are and rised
a discussion about how the situation could be if not fixed, but
at least changed - he proposed to completely formalize userspace
API development. Discussion though turned into proposing different
ways of (automatic) testing.
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Bugs.
Andrew described how kernel bugzilla
is being used and what can be improved in the way
bug walks from original reporter to developer and eventual
fix and what problems rise on this way like bugs
which gets 'lost', i.e. when reporter does not return
back or can not proceed with testing, timing issues
in fixing bugs - if bug has not been fixed very quickly probability
of the successful resolve drops dramatically. Discussion
was rised about ways bugs are being fixed right now
with pointed problematic places and how a situatin
with unloved bugs and bad developers should be fixed.
Discussion then proceeded about review process and how
it can be improved further. One of the idea proposed
by Andrew is to introduce new 'Reviewed-by' tag for patches,
which will include a link for review so that
people could determine quality of the patch and thus
introduce some kind of virtual currency and make review process
more attractive, which was objected by Linus at least for small
patches.
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Kernel summit stated with brief introduction by Theodor Tso.
Then boring stuff took its place: Greg Kroah-Hartman started a discussion
about IP, distros all related things. People talked about shorter/longer releases,
about how will or will not entterprise customers and community happy with that, about tracking
regressions... A long and quite emotional discussion about API breaking
took place then. After passions were cooled down a bit, people talked about
new hardware, about getting drivers upstream and related to this process
problems. Switched to merge early motto and decided that even bad driver
in the tree is better than no driver at all (questionable from my
point of view).
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Next part is mini-conferences reports.
First one is power management report.
Found that suspend to ram kind of works for majrity of people,
but there are quite a lot of problems mostly in drivers.
Suspend to disk is a thing that everyone hates,
and second version (TuxOnIce) is out of the tree.
Drivers are blamed for all problems, like some network
cards (mostly wireless) can not be turned off or switched
into power-saving mode (like OLPC wireless card).
Next filesystem/storage report.
It was held to connect different filesystem/storage developers
together to understand how to have a progress in crossing areas
(like unionfs, which touchs underlying filesystem in different ways)
Number of new storage features (like
self-correcting code usage (if I understood that correctly)) and
object-based disks were briefly described.
VM talk touched memory fragmentation, allocation, caches and theirs
features (like shrinking). FS part contained generic delayed allocation
and its problems and short description of various features.
Containers and related problems were shortly introduced.
Virtualization minisummit report included brief status
of the different virtualization technologies existing today.
number of issues were described:
performance problem in the virtualized environment and ways
to deal with them, interfaces and access methods, different virtualization
mechanisms and theirs status and long way of merging virtualization
support into different distros.
This presentation was actually too technical, but still very interesting
(even modulo my understanding).
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