linux-toradex.git/drivers/lguest/hypercalls.c, branch v3.4.1

lguest: update commentry

2009-07-30T06:33:46+00:00

Every so often, after code shuffles, I need to go through and unbitrot
the Lguest Journey (see drivers/lguest/README).  Since we now use RCU in
a simple form in one place I took the opportunity to expand that explanation.

Signed-off-by: Rusty Russell 
Cc: Ingo Molnar 
Cc: Paul McKenney

lguest: fix comment style

2009-07-30T06:33:45+00:00

I don't really notice it (except to begrudge the extra vertical
space), but Ingo does.  And he pointed out that one excuse of lguest
is as a teaching tool, it should set a good example.

Signed-off-by: Rusty Russell 
Cc: Ingo Molnar

lguest: PAE support

2009-06-12T12:57:08+00:00

This version requires that host and guest have the same PAE status.
NX cap is not offered to the guest, yet.

Signed-off-by: Matias Zabaljauregui 
Signed-off-by: Rusty Russell

lguest: replace hypercall name LHCALL_SET_PMD with LHCALL_SET_PGD

2009-06-12T12:57:07+00:00

replace LHCALL_SET_PMD with LHCALL_SET_PGD hypercall name
(That's really what it is, and the confusion gets worse with PAE support)

Signed-off-by: Matias Zabaljauregui 
Signed-off-by: Rusty Russell 
Reported-by: Jeremy Fitzhardinge

lguest: improve interrupt handling, speed up stream networking

2009-06-12T12:57:03+00:00

lguest never checked for pending interrupts when enabling interrupts, and
things still worked.  However, it makes a significant difference to TCP
performance, so it's time we fixed it by introducing a pending_irq flag
and checking it on irq_restore and irq_enable.

These two routines are now too big to patch into the 8/10 bytes
patch space, so we drop that code.

Note: The high latency on interrupt delivery had a very curious
effect: once everything else was optimized, networking without GSO was
faster than networking with GSO, since more interrupts were sent and
hence a greater chance of one getting through to the Guest!

Note2: (Almost) Closing the same loophole for iret doesn't have any
measurable effect, so I'm leaving that patch for the moment.

Before:
	1GB tcpblast Guest->Host:		30.7 seconds
	1GB tcpblast Guest->Host (no GSO):	76.0 seconds

After:
	1GB tcpblast Guest->Host:		6.8 seconds
	1GB tcpblast Guest->Host (no GSO):	27.8 seconds

Signed-off-by: Rusty Russell

lguest: comment documentation update.

2008-03-28T00:05:54+00:00

Took some cycles to re-read the Lguest Journey end-to-end, fix some
rot and tighten some phrases.

Only comments change.  No new jokes, but a couple of recycled old jokes.

Signed-off-by: Rusty Russell

lguest: Use explicit includes rateher than indirect

2008-01-30T11:50:19+00:00

explicitly use ktime.h include
explicitly use hrtimer.h include
explicitly use sched.h include

This patch adds headers explicitly to lguest sources file,
to avoid depending on them being included somewhere else.

Signed-off-by: Glauber de Oliveira Costa 
Signed-off-by: Rusty Russell

lguest: get rid of lg variable assignments

2008-01-30T11:50:18+00:00

We can save some lines of code by getting rid of
*lg = cpu... lines of code spread everywhere by now.

Signed-off-by: Glauber de Oliveira Costa 
Signed-off-by: Rusty Russell

lguest: per-vcpu lguest pgdir management

2008-01-30T11:50:14+00:00

this patch makes the pgdir management per-vcpu. The pgdirs pool
is still guest-wide (although it'll probably need to grow when we
are really executing more vcpus), but the pgdidx index is gone,
since it makes no sense anymore. Instead, we use a per-vcpu
index.

Signed-off-by: Glauber de Oliveira Costa 
Signed-off-by: Rusty Russell

lguest: make pending notifications per-vcpu

2008-01-30T11:50:13+00:00

this patch makes the pending_notify field, used to control
pending notifications, per-vcpu, instead of per-guest

Signed-off-by: Glauber de Oliveira Costa 
Signed-off-by: Rusty Russell