linux-toradex.git/lib, branch v2.6.13-rc4

[PATCH] statically link halfmd4

2005-07-27T23:25:53+00:00

For some reason halfmd4 isn't being linked into the kernel any more and
modular ext3 wants it.

So statically link the halfmd4 code into the kernel.

Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] mostly_read data section

2005-07-08T01:23:46+00:00

Add a new section called ".data.read_mostly" for data items that are read
frequently and rarely written to like cpumaps etc.

If these maps are placed in the .data section then these frequenly read
items may end up in cachelines with data is is frequently updated.  In that
case all processors in an SMP system must needlessly reload the cachelines
again and again containing elements of those frequently used variables.

The ability to share these cachelines will allow each cpu in an SMP system
to keep local copies of those shared cachelines thereby optimizing
performance.

Signed-off-by: Alok N Kataria 
Signed-off-by: Shobhit Dayal 
Signed-off-by: Christoph Lameter 
Signed-off-by: Shai Fultheim 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] Use ALIGN to remove duplicate code

2005-06-25T23:25:02+00:00

This patch makes use of ALIGN() to remove duplicate round-up code.

Signed-off-by: Nick Wilson 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] lib/sha1.c: fix sparse warning

2005-06-25T23:25:02+00:00

lib/sha1.c:44:10: warning: cast to restricted type

Signed-off-by: Alexey Dobriyan 
Signed-off-by: Domen Puncer 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PKT_SCHED]: Make TEXTSEARCH* options only selected.

2005-06-25T00:39:03+00:00

Do not present these confusing new options to the user
unless he picked some facility that makes use of it,
such as NET_EMATCH_TEXT.

Signed-off-by: David S. Miller

[LIB]: textsearch.o needs to be obj-y not lib-y.

2005-06-24T06:49:52+00:00

It exports symbols.

Signed-off-by: David S. Miller

[LIB]: Naive finite state machine based textsearch

2005-06-24T03:59:16+00:00

A finite state machine consists of n states (struct ts_fsm_token)
representing the pattern as a finite automation. The data is read
sequentially on a octet basis. Every state token specifies the number
of recurrences and the type of value accepted which can be either a
specific character or ctype based set of characters. The available
type of recurrences include 1, (0|1), [0 n], and [1 n].

The algorithm differs between strict/non-strict mode specyfing
whether the pattern has to start at the first octect. Strict mode
is enabled by default and can be disabled by inserting
TS_FSM_HEAD_IGNORE as the first token in the chain.

The runtime performance of the algorithm should be around O(n),
however while in strict mode the average runtime can be better.

Signed-off-by: Thomas Graf 
Signed-off-by: David S. Miller

[LIB]: Knuth-Morris-Pratt textsearch algorithm

2005-06-24T03:58:37+00:00

Implements a linear-time string-matching algorithm due to Knuth,
Morris, and Pratt [1]. Their algorithm avoids the explicit
computation of the transition function DELTA altogether. Its
matching time is O(n), for n being length(text), using just an
auxiliary function PI[1..m], for m being length(pattern),
precomputed from the pattern in time O(m). The array PI allows
the transition function DELTA to be computed efficiently
"on the fly" as needed. Roughly speaking, for any state
"q" = 0,1,...,m and any character "a" in SIGMA, the value
PI["q"] contains the information that is independent of "a" and
is needed to compute DELTA("q", "a") [2]. Since the array PI
has only m entries, whereas DELTA has O(m|SIGMA|) entries, we
save a factor of |SIGMA| in the preprocessing time by computing
PI rather than DELTA.
 
[1] Cormen, Leiserson, Rivest, Stein
    Introdcution to Algorithms, 2nd Edition, MIT Press
[2] See finite automation theory

Signed-off-by: Thomas Graf 
Signed-off-by: David S. Miller

[LIB]: Textsearch infrastructure.

2005-06-24T03:49:30+00:00

The textsearch infrastructure provides text searching
facitilies for both linear and non-linear data.
Individual search algorithms are implemented in modules
and chosen by the user.

Signed-off-by: Thomas Graf 
Signed-off-by: David S. Miller

[PATCH] ia64 uncached alloc

2005-06-22T01:46:18+00:00

This patch contains the ia64 uncached page allocator and the generic
allocator (genalloc).  The uncached allocator was formerly part of the SN2
mspec driver but there are several other users of it so it has been split
off from the driver.

The generic allocator can be used by device driver to manage special memory
etc.  The generic allocator is based on the allocator from the sym53c8xx_2
driver.

Various users on ia64 needs uncached memory.  The SGI SN architecture requires
it for inter-partition communication between partitions within a large NUMA
cluster.  The specific user for this is the XPC code.  Another application is
large MPI style applications which use it for synchronization, on SN this can
be done using special 'fetchop' operations but it also benefits non SN
hardware which may use regular uncached memory for this purpose.  Performance
of doing this through uncached vs cached memory is pretty substantial.  This
is handled by the mspec driver which I will push out in a seperate patch.

Rather than creating a specific allocator for just uncached memory I came up
with genalloc which is a generic purpose allocator that can be used by device
drivers and other subsystems as they please.  For instance to handle onboard
device memory.  It was derived from the sym53c7xx_2 driver's allocator which
is also an example of a potential user (I am refraining from modifying sym2
right now as it seems to have been under fairly heavy development recently).

On ia64 memory has various properties within a granule, ie.  it isn't safe to
access memory as uncached within the same granule as currently has memory
accessed in cached mode.  The regular system therefore doesn't utilize memory
in the lower granules which is mixed in with device PAL code etc.  The
uncached driver walks the EFI memmap and pulls out the spill uncached pages
and sticks them into the uncached pool.  Only after these chunks have been
utilized, will it start converting regular cached memory into uncached memory.
Hence the reason for the EFI related code additions.

Signed-off-by: Jes Sorensen 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds