This patch changes the memory allocation method for the s390 debug feature.
Trace buffers had been allocated using the get_free_pages() function before.
Therefore it was not possible to get big memory areas in a running system due
to memory fragmentation. Now the trace buffers are subdivided into several
subbuffers with pagesize. Therefore it is now possible to allocate more
memory for the trace buffers and more trace records can be written.
In addition to that, dynamic specification of the size of the trace buffers is
implemented. It is now possible to change the size of a trace buffer using a
new debugfs file instance. When writing a number into this file, the trace
buffer size is changed to 'number * pagesize'.
In the past all the traces could be obtained from userspace by accessing files
in the "proc" filesystem. Now with debugfs we have a new filesystem which
should be used for debugging purposes. This patch moves the debug feature
from procfs to debugfs.
Since the interface of debug_register() changed, all device drivers, which use
the debug feature had to be adjusted.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Add interface to issue VM control program commands.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
[patch 10/10] s390: qeth bug fixes.
From: Frank Pavlic <pavlic@de.ibm.com>
qeth network driver related changes:
- due to OSA hardware changes in TCP Segmentation Offload
support we are able now to pack TSO packets too.
This fits perfectly in design of qeth buffer handling and
sending data respectively.
- remove skb_realloc_headroom from the sending path since
hard_header_len value provides enough headroom now.
- device recovery behaviour improvement
- bug fixed in Enhanced Device Driver Packing functionality
Signed-off-by: Frank Pavlic <pavlic@de.ibm.com>
[patch 8/10] s390: fakell for high speed token ring.
From: Michael Holzheu <holzheu@de.ibm.com>
Implement fake-link-layer for high speed token ring. Without it
token ring packages get leading ethernet headers, which confuses
dhcp.
Signed-off-by: Frank Pavlic <pavlic@de.ibm.com>
[patch 7/10] s390: qeth bug fixes.
From: Frank Pavlic <pavlic@de.ibm.com>
qeth network driver changes:
- Removed redundant code, use the same qeth_fill_buffer_frag
for TSO path either
- Using skb->frags solely is not correct since skb->data still
points to the beginning of the whole data, even when it is
a small portion we have to fill the qdio buffer with it.
Signed-off-by: Frank Pavlic <pavlic@de.ibm.com>
[patch 6/10] s390: enable iucv_send2way_xxx functions.
From: Ursula Braun-Krahl <braunu@de.ibm.com>
The SSL-Server of z/VM wants to use the iucv_send2way
and iucv_send2way_array function. Enable them again.
Signed-off-by: Frank Pavlic <pavlic@de.ibm.com>
[patch 4/10] s390: schedule_timeout cleanup in ctctty.
From: Domen Puncer <domen@coderock.org>
Use msleep_interruptible() instead of schedule_timeout()
to guarantee the task delays as expected.
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Maximilian Attems <janitor@sternwelten.at>
Signed-off-by: Domen Puncer <domen@coderock.org>
Signed-off-by: Frank Pavlic <pavlic@de.ibm.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
[patch 3/10] s390: set online race in the lcs driver.
From: Michael Holzheu <holzheu@de.ibm.com>
There is a race between lcs_stopcard() and lcs_open_device() which
can lead to the error 'lcs: Error in starting channel, rc=-16'.
lcs_open_device() is invoked when 'ifconfig up' is called due to a
hotplug event, which is caused by register_netdev(). In parallel
lcs_stopcard() is executed. Both functions are sending lcs commands.
The second invocation fails with -EBUSY (-16) as return value.
Move invocation of register_netdev() after invocation of lcs_stopcard
to avoid the race.
Signed-off-by: Frank Pavlic <pavlic@de.ibm.com>
[patch 2/10] s390: multicast address registration in lcs.
From: Michael Holzheu <holzheu@de.ibm.com>
When setting lcs devices online you can run into an endless loop,
because the code that registers the multicast addresses uses
list_for_each_entry instead of list_for_each_entry_safe.
Signed-off-by: Frank Pavlic <pavlic@de.ibm.com>
[patch 1/10] s390: claw driver wiring.
From: Andy Richter <richtera@us.ibm.com>
claw network driver changes:
- Add an entry to the drivers/s390/net Makefile to build the claw driver.
- Add claw channel type to cu3088.
Signed-off-by: Frank Pavlic <pavlic@de.ibm.com>
An arbitrary guest must not be allowed to trigger cmm actions. Only one
specific guest namely the one that serves as the resource monitor may send cmm
messages. Add a parameter that allows to specify the guest that may send
messages. z/VMs resource manager has the name 'VMRMSVM' which is the default.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
