litmus-rt-odroidx.git/Documentation, branch odroidx

Apply k4412 kernel from HardKernel for ODROID-X.

2012-09-28T18:50:15+00:00

stable: update references to older 2.6 versions for 3.x

2012-08-09T15:27:36+00:00

commit 2584f5212d97b664be250ad5700a2d0fee31a10d upstream.

Also add information on where the respective trees are.

Signed-off-by: Paul Gortmaker 
Acked-by: Rob Landley 
Signed-off-by: Greg Kroah-Hartman

mm: change isolate mode from #define to bitwise type

2012-08-01T19:27:16+00:00

commit 4356f21d09283dc6d39a6f7287a65ddab61e2808 upstream.

Stable note: Not tracked in Bugzilla. This patch makes later patches
	easier to apply but has no other impact.

Change ISOLATE_XXX macro with bitwise isolate_mode_t type.  Normally,
macro isn't recommended as it's type-unsafe and making debugging harder as
symbol cannot be passed throught to the debugger.

Quote from Johannes
" Hmm, it would probably be cleaner to fully convert the isolation mode
into independent flags.  INACTIVE, ACTIVE, BOTH is currently a
tri-state among flags, which is a bit ugly."

This patch moves isolate mode from swap.h to mmzone.h by memcontrol.h

Signed-off-by: Minchan Kim 
Cc: Johannes Weiner 
Cc: KAMEZAWA Hiroyuki 
Cc: KOSAKI Motohiro 
Cc: Mel Gorman 
Cc: Rik van Riel 
Cc: Michal Hocko 
Cc: Andrea Arcangeli 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Mel Gorman 
Signed-off-by: Greg Kroah-Hartman

stable: Allow merging of backports for serious user-visible performance issues

2012-07-16T15:47:48+00:00

commit eb3979f64d25120d60b9e761a4c58f70b1a02f86 upstream.

Distribution kernel maintainers routinely backport fixes for users that
were deemed important but not "something critical" as defined by the
rules. To users of these kernels they are very serious and failing to fix
them reduces the value of -stable.

The problem is that the patches fixing these issues are often subtle and
prone to regressions in other ways and need greater care and attention.
To combat this, these "serious" backports should have a higher barrier
to entry.

This patch relaxes the rules to allow a distribution maintainer to merge
to -stable a backported patch or small series that fixes a "serious"
user-visible performance issue. They should include additional information on
the user-visible bug affected and a link to the bugzilla entry if available.
The same rules about the patch being already in mainline still apply.

Signed-off-by: Mel Gorman 
Signed-off-by: Greg Kroah-Hartman

docs: update HOWTO for 2.6.x -> 3.x versioning

2012-06-01T07:12:55+00:00

commit 591bfc6bf9e5e25e464fd4c87d64afd5135667c4 upstream.

The HOWTO document needed updating for the new kernel versioning. The
git URI for -next was updated as well.

Signed-off-by: Kees Cook 
Signed-off-by: Greg Kroah-Hartman

tcp: change tcp_adv_win_scale and tcp_rmem[2]

2012-05-21T16:40:00+00:00

[ Upstream commit b49960a05e32121d29316cfdf653894b88ac9190 ]

tcp_adv_win_scale default value is 2, meaning we expect a good citizen
skb to have skb->len / skb->truesize ratio of 75% (3/4)

In 2.6 kernels we (mis)accounted for typical MSS=1460 frame :
1536 + 64 + 256 = 1856 'estimated truesize', and 1856 * 3/4 = 1392.
So these skbs were considered as not bloated.

With recent truesize fixes, a typical MSS=1460 frame truesize is now the
more precise :
2048 + 256 = 2304. But 2304 * 3/4 = 1728.
So these skb are not good citizen anymore, because 1460 < 1728

(GRO can escape this problem because it build skbs with a too low
truesize.)

This also means tcp advertises a too optimistic window for a given
allocated rcvspace : When receiving frames, sk_rmem_alloc can hit
sk_rcvbuf limit and we call tcp_prune_queue()/tcp_collapse() too often,
especially when application is slow to drain its receive queue or in
case of losses (netperf is fast, scp is slow). This is a major latency
source.

We should adjust the len/truesize ratio to 50% instead of 75%

This patch :

1) changes tcp_adv_win_scale default to 1 instead of 2

2) increase tcp_rmem[2] limit from 4MB to 6MB to take into account
better truesize tracking and to allow autotuning tcp receive window to
reach same value than before. Note that same amount of kernel memory is
consumed compared to 2.6 kernels.

Signed-off-by: Eric Dumazet 
Cc: Neal Cardwell 
Cc: Tom Herbert 
Cc: Yuchung Cheng 
Acked-by: Neal Cardwell 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

hwmon: (jc42) Add support for AT30TS00, TS3000GB2, TSE2002GB2, and MCP9804

2012-03-12T17:33:00+00:00

commit 1bd612a25855f4cc9345052b53d7da697dba6358 upstream.

Also update IDT datasheet locations.

Signed-off-by: Guenter Roeck 
Acked-by: Jean Delvare 
Signed-off-by: Greg Kroah-Hartman

hwmon: (jc42) Add support for ST Microelectronics STTS2002 and STTS3000

2012-03-12T17:33:00+00:00

commit 4de86126a712ba83fa038d277c8282f7ed466a4b upstream.

These are fully compatible with Jedec JC 42.4 as far as I can see.

Signed-off-by: Jean Delvare 
Cc: Guenter Roeck 
Signed-off-by: Guenter Roeck 
Signed-off-by: Greg Kroah-Hartman

USB: update documentation for usbmon

2012-01-12T19:35:06+00:00

commit d8cae98cddd286e38db1724dda1b0e7b467f9237 upstream.

The documentation for usbmon is out of date; the usbfs "devices" file
now exists in /sys/kernel/debug/usb rather than /proc/bus/usb.  This
patch (as1505) updates the documentation accordingly, and also
mentions that the necessary information can be found by running lsusb.

Signed-off-by: Alan Stern 
CC: Pete Zaitcev 
Signed-off-by: Greg Kroah-Hartman

Documentation: Update stable address

2012-01-12T19:34:54+00:00

commit 2eb7f204db51969ea558802a6601d79c2fb273b9 upstream.

The Japanese/Korean/Chinese versions still need updating.

Also, the stable kernel 2.6.x.y descriptions are out of date
and should be updated as well.

Signed-off-by: Joe Perches 
Signed-off-by: Greg Kroah-Hartman