Charles Jacobsen authored Apr 06, 2016 and Vikram Narayanan committed Dec 19, 2016

unregister fs does a synchronize_rcu, which basically waits
for all cpu's to enter a "quiescent" state. The PMFS LCD thread
was never yielding as it waited for the response, so we had a
deadlock. I just needed to move cond_resched into the right place
in microkernel/run.c.

Charles Jacobsen authored Apr 07, 2016 and Vikram Narayanan committed Dec 19, 2016

Kmalloc memory is not executable by default.

I also needed to make the maximum size ram map allocation bigger
in order to map 2 GBs.

Charles Jacobsen authored Apr 18, 2016 and Vikram Narayanan committed Dec 19, 2016

We need a way to temporarily prevent external interrupts from
causing an LCD exit.

Charles Jacobsen authored Apr 15, 2016 and Vikram Narayanan committed Dec 19, 2016

You have to be careful where you put your asyncs, especially
with poll recv. If you wrap the call to poll recv in an async,
you will consume lots of memory. I moved the async so it surrounds
the dispatch function only.

In the process, to debug, I updated libasync with THCDumpAllStacks
(I was trying to see what all the stacks were - they were all coming
from poll recv).

NOTE: While debugging, I tweaked the microkernel dump stack code
to work for THCDumpAllStacks (continue walking until we hit a
frame or return address). If you don't make this change,
THCDumpAllStacks will not crash, but it won't be informative either
(the stack walk will stop too soon).

I'm able to run at least 100 iterations now of mount/unmount without
any problems.

Charles Jacobsen authored Apr 15, 2016 and Vikram Narayanan committed Dec 19, 2016

I wasn't acknowledging receipt of a couple responses, and the
async ipc buffer (the vfs tx buffer) slowly filled up after a
couple of test iterations.

But not all the way. It should be noted that if the async ipc
buffers are not big enough, you will get a deadlock. This is
because so many requests stay active before they are finally
ack'd with a response. This is due to the criss-crossing.

Charles Jacobsen authored Apr 14, 2016 and Vikram Narayanan committed Dec 19, 2016

Needed to null out cnode metadata.

Charles Jacobsen authored Apr 14, 2016 and Vikram Narayanan committed Dec 19, 2016

Wasn't storing metadata in cnode in cspace in a certain case.

Charles Jacobsen authored Apr 12, 2016 and Vikram Narayanan committed Dec 19, 2016

I forgot I was memset'ing it to 0 in slab.c (and it wasn't necessary).

Charles Jacobsen authored Mar 28, 2016 and Vikram Narayanan committed Dec 19, 2016

Command line string parsing functions are sucked in.

kthread spawning and waitqueue functions are no-op'd for now (these
are for pmfs's log cleaner). In the future, could redef these to
use libasync.

struct cptr_cache in libcap has struct mutex as a member. In its original
definition struct mutex has ifdef'd members, depending on the config chosen.
Since, liblcd build undef's certain config's explicitly (such as CONFIG_SMP),
this alters the size of struct mutex inside liblcd. To make the struct mutexes
equal in size, padding was introduced.

with 4.8, there is no difference in struct mutex size inside liblcd. So, make
this padding to zero for proper functioning of libcap.
Signed-off-by: Vikram Narayanan <vikram186@gmail.com>

__get_cpu_var is replaced by this_cpu_read.

From commit,
1e02ce4c

 x86: Store a per-cpu shadow copy of CR4
CR4 reads take several cycles. So, store a per-cpu shadow copy of CR4.

So, replace direct reads with shadow_read()
Signed-off-by: Vikram Narayanan <vikram186@gmail.com>

Use our old mm codebase (based on v3.10) and push in changes that are required
to make it compile with v4.8's header files. To make this work I pulled in
3.10's slab_def.h to kick out 4.8's slab_def.h

The changes are not that significant
* Removed struct slab, struct slab_rcu (Use struct page instead)
* Few kmem_chg related APIs were changed
* Some minor optimizations

Merged from
45eed508 slab: remove SLAB_LIMIT
16025177 slab: remove kmem_bufctl_t
b1cb0982 slab: change the management method of free objects of the slab
a57a4988 slab: use __GFP_COMP flag for allocating slab pages
56f295ef slab: use well-defined macro, virt_to_slab()
68126702 slab: overloading the RCU head over the LRU for RCU free
07d417a1 slab: remove cachep in struct slab_rcu
1ea991b0 slab: remove nodeid in struct slab
ac2b54ed slab: remove colouroff in struct slab
0c3aa83e slab: change return type of kmem_getpages() to struct page
73293c2f slab: correct pfmemalloc check
276a2439 mm/slab: Give s_next and s_stop slab-specific names
e25839f6 mm/slab: Sharing s_next and s_stop between slab and slub
0fa8103b

 mm/slab: Fix drain freelist excessively
Signed-off-by: Vikram Narayanan <vikram186@gmail.com>

alloc_pages_exact_node() has been replaced with __alloc_pages_node in the
kernel.
Signed-off-by: Vikram Narayanan <vikram186@gmail.com>

Also remove pmfs from build
Signed-off-by: Vikram Narayanan <vikram186@gmail.com>

vmcs and resolve.c
Signed-off-by: Vikram Narayanan <vikram186@gmail.com>

Signed-off-by: Vikram Narayanan <vikram186@gmail.com>

Signed-off-by: Vikram Narayanan <vikram186@gmail.com>

struct module's layout has been changed in v4.8. Accomodate those changes
inside LCD.
Signed-off-by: Vikram Narayanan <vikram186@gmail.com>

These files got messed up somehow during merge.
Signed-off-by: Vikram Narayanan <vikram186@gmail.com>

module.c has quite many modifications to load an LCD module. Bring in those
changes that were left out during merge.
Signed-off-by: Vikram Narayanan <vikram186@gmail.com>

Some of them creeped in silently during merge, rest is from pmfs. Since pmfs
won't work with v4.8 anymore, remove it.
http://lists.infradead.org/pipermail/linux-pmfs/2016-June/000148.html

Signed-off-by: Vikram Narayanan <vikram186@gmail.com>

Indentation function is being called from many places to ensure
proper spacing in the generated file. However, this malloc'ed
memory is never freed. Switch to a version using switch..case
which does not use memory
Signed-off-by: Vikram Narayanan <vikram186@gmail.com>

Most of the fixes were indentation fixes (indentation of the
generated code). Also add missing ';' for members inside
struct declaration
Signed-off-by: Vikram Narayanan <vikram186@gmail.com>

These are generated files which need not be committed.
Signed-off-by: Vikram Narayanan <vikram186@gmail.com>

Signed-off-by: Vikram Narayanan <vikram186@gmail.com>

Files generated by the compiler had same name for
client and server source. Fix that.
Signed-off-by: Vikram Narayanan <vikram186@gmail.com>

Identifier in C cannot have a '-' symbol. Since our idl file is
sort of compliant to C standard, let's stick to C standards
Signed-off-by: Vikram Narayanan <vikram186@gmail.com>

The generated files are being written to a file, but not closed.
Signed-off-by: Vikram Narayanan <vikram186@gmail.com>

list out all options that this program can take.
Some options are not yet implemented (TODO)
Signed-off-by: Vikram Narayanan <vikram186@gmail.com>

Sarah Spall authored Apr 23, 2016 and Vikram Narayanan committed Oct 26, 2016

updated code that generates trampoline functions to reflect some changes. such as change dstore to cspace