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Group the global TOD variables (_TOD_Now, _TOD_Uptime, and _TOD_Is_set)
in a structure to reduce address loads in _TOD_Tickle_ticks().
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Read-ahead requests were previously executed in the context of the
reading task. This blocks the reading task until the complete read
with read-ahead transfer is finished. A read-ahead task is introduced
to off-load the read-ahead transfer. This allows the reading task to
work with the requested block more quickly. The read-ahead is triggered
after two misses of ascending consecutive blocks or a read hit of a
block read by the most-recent read-ahead transfer. The read-ahead
feature is configurable and can be disabled.
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This reverts commit 0c2d8ec48a116cadb86564bc1226e308e197d4c1.
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This reverts commit 87c8d8aba6a9582ca5eeacd332b5b107e26ea50f.
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This reverts commit 6a5bd1c65c005457455db344f2ee831d7a5cf99b.
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This reverts commit a80a108d447d596e476611108cd468ec993be4a6.
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Add block_count and media_blocks_per_block to rtems_disk_device. Add
and use rtems_disk_init_phys() and rtems_disk_init_log().
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This allows addtion of per disk statistics for example.
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The task stack size for the swap-out and worker tasks is now
configurable. The bdbuf task resources are now included in the work
space size estimate.
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This reverts commit 0c2d8ec48a116cadb86564bc1226e308e197d4c1.
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This reverts commit 87c8d8aba6a9582ca5eeacd332b5b107e26ea50f.
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This reverts commit 6a5bd1c65c005457455db344f2ee831d7a5cf99b.
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This reverts commit a80a108d447d596e476611108cd468ec993be4a6.
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Use C pre-processor instead of shell commands.
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Use C pre-processor instead of shell commands.
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The header file <rtems/malloc.h> provides now also the malloc_walk()
prototype.
The malloc_walk() prototype reflects now the _Protected_heap_Walk() API.
The return status helps to print only in case of an error.
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The scope of the file system operations is the file system instance.
The scope of the file system node handlers is the file location. The
benefit of moving the operations to the mount table entry is a size
reduction of the file location (rtems_filesystem_location_info_t). The
code size is slightly increased due to additional load instructions.
Restructure rtems_filesystem_mount_table_entry_t to improve cache
efficiency.
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Script does what is expected and tries to do it as
smartly as possible.
+ remove occurrences of two blank comment lines
next to each other after Id string line removed.
+ remove entire comment blocks which only exited to
contain CVS Ids
+ If the processing left a blank line at the top of
a file, it was removed.
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The fat_file_datasync() read every cluster of the file into the cache
and then synchronized it step-by-step. For unmodified buffers this is a
non-operation. For modified buffers this will wake-up the swapout task
which performs then a single buffer write operation. This is usually
quite inefficient. Firstly we do single buffer writes, secondly we
may perform a lot of unnecessary read operations (for huge files this is
really bad), and thirdly this leads likely to cache evictions.
The synchronization procedure is replaced by a simple
rtems_bdbuf_sync_dev(). This has the side-effect that also buffers not
related to the file are synchronized, but since the modified list is
normally short this should be acceptable.
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According to POSIX the lseek() function shall not, by itself, extend the
size of a file.
Remove the size field of rtems_libio_t. A file has only one size but
may have multiple open file descriptors. Thus a file size field in the
file descriptor may lead to inconsistencies.
New default handlers rtems_filesystem_default_lseek_file() and
rtems_filesystem_default_lseek_directory().
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Global data was declared in system.h but should have been extern
in system.h and declared in init.c. There were duplicate symbol
linking errors on at least powerpc/mpc8260ads.
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The implementation of RBTree_Next was using an awkward construction to detect
and avoid accessing the false root of the red-black tree. To deal with the
false root, RBTree_Next was comparing node parents with the control node.
Instead the false root can be detected by checking if the grandparent of a
node exists; the grandparent of the tree's true root is NULL by definition
so the root of the tree is found while walking up the tree by checking for
the non-existence of a grandparent.
This change propagates into the predecessor/successor and iterate functions.
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See http://www.rtems.org/pipermail/rtems-devel/2012-May/001006.html
for details.
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LINK_OBJS =
instead of
LINK_OBJS = $(mp01_node1_OBJECTS)
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LINK_OBJS =
instead of
LINK_OBJS = $(mp01_node1_OBJECTS)
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The per file descriptor semaphore (field of rtems_libio_t) is unused in
RTEMS. There is a considerable memory overhead due to that. A
semaphore needs roughly 124 bytes which is huge compared to the
approximately 72 bytes for the file descriptor structure itself. Device
drivers can create their own synchronization primitives in the open
handler on demand.
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