Dan Magenheimer [Wed, 5 Sep 2012 20:45:01 +0000 (13:45 -0700)]
staging: ramster: place ramster codebase on top of new zcache2 codebase
[V2: rebased to apply to 20120905 staging-next, no other changes]
This slightly modified ramster codebase is now built entirely on zcache2
and all ramster-specific code is fully contained in a subdirectory.
Ramster extends zcache2 to allow pages compressed via zcache2 to be
"load-balanced" across machines in a cluster. Control and data communication
is done via kernel sockets, and cluster configuration and management is
heavily leveraged from the ocfs2 cluster filesystem.
There are no new features since the codebase introduced into staging at 3.4.
Some cleanup was performed though:
1) Interfaces directly with new zbud
2) Debugfs now used instead of sysfs where possible. Sysfs still
used where necessary for userland cluster configuration.
Ramster is very much a work-in-progress but also does really work!
RAMSTER HIGH LEVEL OVERVIEW (from original V5 posting in Feb 2012)
RAMster implements peer-to-peer transcendent memory, allowing a "cluster" of
kernels to dynamically pool their RAM so that a RAM-hungry workload on one
machine can temporarily and transparently utilize RAM on another machine which
is presumably idle or running a non-RAM-hungry workload. Other than the
already-merged cleancache patchset and frontswap patchset, no core kernel
changes are currently required.
(Note that, unlike previous public descriptions of RAMster, this implementation
does NOT require synchronous "gets" or core networking changes. As of V5,
it also co-exists with ocfs2.)
RAMster combines a clustering and messaging foundation based on the ocfs2
cluster layer with the in-kernel compression implementation of zcache2, and
adds code to glue them together. When a page is "put" to RAMster, it is
compressed and stored locally. Periodically, a thread will "remotify" these
pages by sending them via messages to a remote machine. When the page is
later needed as indicated by a page fault, a "get" is issued. If the data
is local, it is uncompressed and the fault is resolved. If the data is
remote, a message is sent to fetch the data and the faulting thread sleeps;
when the data arrives, the thread awakens, the data is decompressed and
the fault is resolved.
As of V5, clusters up to eight nodes are supported; each node can remotify
pages to one specified node, so clusters can be configured as clients to
a "memory server". Some simple policy is in place that will need to be
refined over time. Larger clusters and fault-resistant protocols can also
be added over time.
A HOW-TO is available at:
http://oss.oracle.com/projects/tmem/dist/files/RAMster/HOWTO-120817
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dan Magenheimer [Wed, 5 Sep 2012 20:45:00 +0000 (13:45 -0700)]
staging: ramster: move to new zcache2 codebase
[V2: rebased to apply to 20120905 staging-next, no other changes]
The original zcache in staging is a "demo" version, and this is a massive
rewrite. This was intended to result in a merged zcache and ramster, but
that option has been blocked so, to continue forward progress on ramster
and future related projects, only ramster moves to the new codebase.
To differentiate between the old demo zcache and the rewrite, we refer
to the latter as zcache2, config'd as CONFIG_ZCACHE2. Zcache and zcache2
cannot be built in the same kernel, so CONFIG_ZCACHE2 implies !CONFIG_ZCACHE.
This developer still has hope that zcache and zcache2 will be merged
into one codebase. Until then, zcache2 can be considered a one-node
version of ramster.
No history of changes was recorded during the zcache2 rewrite and recreating
a sane one would be a Sisyphean task but, since ramster is still in
staging and has been unchanged since it was merged, presumably this
is acceptable.
This commit also provides the hooks in zcache2 for ramster, but all
ramster-specific code is provided in a separate commit.
Some of the highlights of this rewritten codebase for zcache2:
(Note: If you are not familiar with the tmem terminology, you can review
it here: http://lwn.net/Articles/454795/ )
1. Merge of "demo" zcache and the v1.1 version of zcache in ramster. Zcache
and ramster had a great deal of duplicate code which is now merged.
In essence, zcache2 *is* ramster but with no remote machine available,
but !CONFIG_RAMSTER will avoid compiling lots of ramster-specific code.
2. Allocator. Previously, persistent pools used zsmalloc and ephemeral pools
used zbud. Now a completely rewritten zbud is used for both. Notably
this zbud maintains all persistent (frontswap) and ephemeral (cleancache)
pageframes in separate queues in LRU order.
3. Interaction with page allocator. Zbud does no page allocation/freeing,
it is done entirely in zcache2 where it can be tracked more effectively.
4. Better pre-allocation. Previously, on put, if a new pageframe could not be
pre-allocated, the put would fail, even if the allocator had plenty of
partial pages where the data could be stored; this is now fixed.
5. Ouroboros ("eating its own tail") allocation. If no pageframe can be
allocated AND no partial pages are available, the least-recently-used
ephemeral pageframe is reclaimed immediately (including flushing tmem
pointers to it) and re-used. This ensures that most-recently-used
cleancache pages are more likely to be retained than LRU pages and also
that, as in the core mm subsystem, anonymous pages have a higher priority
than clean page cache pages.
6. Zcache and zbud now use debugfs instead of sysfs. Ramster uses debugfs
where possible and sysfs where necessary. (Some ramster configuration
is done from userspace so some sysfs is necessary.)
7. Modularization. As some have observed, the monolithic zcache-main.c code
included zbud code, which has now been separated into its own code module.
Much ramster-specific code in the old ramster zcache-main.c has also been
moved into ramster.c so that it does not get compiled with !CONFIG_RAMSTER.
8. Rebased to 3.5.
This new codebase also provides hooks for several future new features:
A. WasActive patch, requires some mm/frontswap changes previously posted.
A new version of this patch will be provided separately.
See ifdef __PG_WAS_ACTIVE
B. Exclusive gets. It seems tmem _can_ support exclusive gets with a
minor change to both zcache2 and a small backwards-compatible change
to frontswap.c. Explanation and frontswap patch will be provided
separately. See ifdef FRONTSWAP_HAS_EXCLUSIVE_GETS
C. Ouroboros writeback. Since persistent (frontswap) pages may now also be
reclaimed in LRU order, the foundation is in place to properly writeback
these pages back into the swap cache and then the swap disk. This is still
under development and requires some other mm changes which are prototyped.
See ifdef FRONTSWAP_HAS_UNUSE.
A new feature that desperately needs attention (if someone is looking for
a way to contribute) is kernel module support. A preliminary version of
a patch was posted by Erlangen University and needs to be integrated and
tested for zcache2 and brought up to kernel standards.
If anybody is interested on helping out with any of these, let me know!
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dan Magenheimer [Wed, 5 Sep 2012 20:44:59 +0000 (13:44 -0700)]
staging: ramster: remove old driver to prep for new base
[V2: rebased to apply to 20120905 staging-next, no other changes]
To prep for moving the ramster codebase on top of the new
redesigned zcache2 codebase, we remove ramster (as well
as its contained diverged v1.1 version of zcache) entirely.
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
staging: slicoss: clean the spinlock code in slic_entry_open
the locked variable is used for checking whether the function
acquired lock, then unlock. actually with out this we
can achieve the same lock and unlock senario, remove the locked
variable and also cleanup the code around.
staging: slicoss: remove default case after we done with request_firmware
we are returning -ENOENT when there is no firmware file for a matching
device id. then we start calling request_firmware,
after this we do checks on the firmware length of corresponding
device id, since the default case is handled in the begining itself
there is no need of a default case at the firmware length checks
Staging: ipack: fix build failure in powerpc allyesconfig
Caused by commit 187e47824013 ("Staging: ipack: Read the ID space during
device registration").
drivers/staging/ipack/ipack.c: In function 'ipack_device_read_id':
drivers/staging/ipack/ipack.c:291:2: error: implicit declaration of function
'ioread8' [-Werror=implicit-function-declaration]
drivers/staging/ipack/ipack.c:309:3: error: implicit declaration of function
'ioread16be' [-Werror=implicit-function-declaration]
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ian Abbott [Wed, 5 Sep 2012 10:02:40 +0000 (11:02 +0100)]
staging: comedi: das08: Use struct comedi_device hw_dev for PCI
Remove the pointer to the PCI device from the private data `struct
das08_private_struct`. Use `comedi_set_hw_dev()` to save a pointer to
the PCI device (actually, its embedded `struct device`) and
`comedi_to_pci_dev()` to retrieve it.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ian Abbott [Wed, 5 Sep 2012 10:02:39 +0000 (11:02 +0100)]
staging: comedi: das08: No need to manipulate PCI ref count
Now that this driver no longer supports "manual" attachment of PCI
devices in its `attach` hook (`das08_attach()`), it no longer has code
that searches for a suitable PCI device and increments its reference
count. Since the driver no longer has any reason for incrementing and
decrementing the PCI device's reference count, the calls to
`pci_dev_get()` and `pci_dev_put()` can be removed.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The addi_amcc_S5920.c file only has the function i_AddiHeaderRW_ReadEeprom()
in it. The addi_amcc_S5920.h file has a prototype for this function and a
couple defines for the magic numbers used when accessing the eeprom.
The .c file is not actually built by any .config selection, or by an
The .h file is only #include'd by the hwdrv_apci3200.c file. That file
actually has a local version of the i_AddiHeaderRW_ReadEeprom() function
that is identical to the one in the .c file.
Just move the #define's from the .h file into hwdrv_apci3200.c and remove
the addi_amcc_S5920.[ch] files.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Ian Abbott <abbotti@mev.co.uk> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Nothing in the comedi subsystem references this header file. It's
actually almost a straight copy of the addi_amcc_s5933.h file anyway.
Just remove the file.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The Makefile for the comedi subsystem does not compile this file
for any .config selection. This file would allow building one big
driver to support all the addi-data cards.
The addi-data drivers are a big enough mess as-is. Just remove this
file.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Iam Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Staging: ipack: Implement device matching on the bus level.
Devices are match based upon their vendor and device ids. Since
the individual drivers provide a list of supported ids they do not
need to implement the matching themselves.
The modaliases look like ipack:fXvNdM, where X is the format version (8
bit) and N and M are the vendor and device ID represented as 32 bit
hexadecimal numbers each. Using 32 bits allows us to define IPACK_ANY_ID
as (~0) without interfering with the valid ids.
The resulting modalias string for ipoctal.ko looks like this (once
ipoctal provides a device table):
alias: ipack:f01v000000F0d00000048*
alias: ipack:f01v000000F0d0000002A*
alias: ipack:f01v000000F0d00000022*
(output from modinfo)
Staging: ipack/bridges/tpci200: Use the TPCI200 in big endian mode.
During initialization we configure the TPCI200 so it does not swap data
lanes on IndustryPack module access. The read and write functions are
changed accordingly.
We are taking this approach in the hope that all IP Carriers are able to
present the Module memory layout unchanged. We can thus directly access
the memory and registers of IP Modules without having to rely on the
read and write wrappers currently exposed in ipack_bus_opts. A later
patch will convert the existing driver and remove the wrappers.
Devendra Naga [Sun, 26 Aug 2012 07:12:50 +0000 (12:42 +0530)]
staging: slicoss: release firmware before returning
we request_firmware in slic_card_download_gbrcv and we return out
with out calling release_firmware, where we compare against a
firmware lengths of certain device ids.
Devendra Naga [Sun, 26 Aug 2012 07:06:56 +0000 (12:36 +0530)]
staging: slicoss: return early before calling request_firmware with empty firmware filename
when the device id doesn't match in slic_card_download_gbrcv the filename is "",
i.e an empty name, and we try calling request_firmware with that name,
actually we can just fail out at default case before even calling request_firmware
Devendra Naga [Sat, 25 Aug 2012 17:40:47 +0000 (23:10 +0530)]
staging: sbe-2t3e3: fix sparse warnings
warnings:
drivers/staging/sbe-2t3e3/netdev.c:24:5: warning: symbol 't3e3_ioctl' was not declared. Should it be static?
drivers/staging/sbe-2t3e3/netdev.c:85:5: warning: symbol 't3e3_open' was not declared. Should it be static?
drivers/staging/sbe-2t3e3/netdev.c:100:5: warning: symbol 't3e3_close' was not declared. Should it be static?
Wei Yongjun [Thu, 23 Aug 2012 06:40:28 +0000 (14:40 +0800)]
staging: r8712u: use is_zero_ether_addr() instead of memcmp()
Using is_zero_ether_addr() instead of directly use
memcmp(addr, "\x00\x00\x00\x00\x00\x00", ETH_ALEN)
to determine if the ethernet address is all zeros.
spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)
Wei Yongjun [Tue, 21 Aug 2012 08:39:04 +0000 (16:39 +0800)]
Staging: rtl8192u: using random_ether_addr() to generate random MAC
Using random_ether_addr() to generate a random Ethernet
address (MAC) that is not multicast and has the local
assigned bit set. Not need to duplicating its implementation.
spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)
Wei Yongjun [Tue, 21 Aug 2012 08:38:45 +0000 (16:38 +0800)]
staging: rtl8192e: using random_ether_addr() to generate random MAC
Using random_ether_addr() to generate a random Ethernet
address (MAC) that is not multicast and has the local
assigned bit set. Not need to duplicating its implementation.
spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)
Wei Yongjun [Tue, 21 Aug 2012 08:36:28 +0000 (16:36 +0800)]
staging: rtl8187se: using random_ether_addr() to generate random MAC
Using random_ether_addr() to generate a random Ethernet
address (MAC) that is not multicast and has the local
assigned bit set. Not need to duplicating its implementation.
spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)
Samuel Thibault [Sun, 26 Aug 2012 21:35:17 +0000 (23:35 +0200)]
speakup: lower default software speech rate
Speech synthesis beginners need a low speech rate, and trained people
want a high speech rate. A medium speech rate is thus actually not a
good default for neither. Since trained people will typically know how
to change the rate, better default for a low speech rate, which
beginners can grasp and learn how to increase it afterwards
This was agreed with users on the speakup mailing list.
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
projects / ~emulex / infiniband.git / log