At least 64bit Seoul dies with Region_conflict reliable and reproducible.
When during startup of Seoul some Genode code (caused by executing some
constructors) try to attach a region, the region manager code in the rm_session
will try to place the attachment at the smallest large enough aligned free
virtual region.
For now, I observed one attachment causing trouble (but not knowing who causes
this - it does also not really matter). The questionable region is 0x4000 of
size for 32bit and 0x8000 of size for 64bit.
To steer the region manager a bit, we try now following trick:
With this commit the load address of the binary for 32 and 64 bit is moved
close to the end of the virtual address space, but leaving enough free virtual
space for the above observed attachment (and a bit more).
The region manager code now will try to fill up the virtual region behind
the binary up to the end of the virtual address space, effectively letting the
lower virtual region untouched - hopefully.
Works for now, but it will break again - for sure.
Fixes#519
To avoid build conflicts with Qt5, with this patch, 'qt4_deprecated' needs
to be added to the 'SPECS' variable (in specs.conf) when building for Qt4.
Issue #345.
By now Signal_session_component has allocated initial SLAB
blocks in constructor, wich crashed with the root
components assumptions about the RAM quota needs of
session creation. Thus, if the background allocator was already
exhausted from component allocation the session was created
with broken initial SLAB blocks.
fix#574
If a script is executed which uses a interpreter that does not exist the
construction of the child fails and potentially leaks memory because the
wrong delete operator is called.
Therefore the binary dataspace of the script and the binary dataspace of
the interpreter are now checked before a new child will be created.
Fixes#812.
The assignment of affinities consists of two parts, the definition
of the affinity space dimensions as used for the init process, and
the association sub systems with affinity locations (relative to the
affinity space). The affinity space is configured as a sub node of the
config node. For example, the following declaration describes an
affinity space of 4x2:
<config>
...
<affinity_space width="4" height="2" />
...
</config>
Subsystems can be constrained to parts of the affinity space using
the '<affinity>' sub node of a '<start>' entry:
<config>
...
<start name="loader">
<affinity xpos="0" ypos="1" width="2" height="1" />
...
</start>
...
</config>
This patch extends the 'Parent::session()' and 'Root::session()'
functions with an additional 'affinity' parameter, which is inteded to
express the preferred affinity of the new session. For CPU sessions
provided by core, the values will be used to select the set of CPUs
assigned to the CPU session. For other services, the session affinity
information can be utilized to optimize the locality of the server
thread with the client. For example, to enable the IRQ session to route
an IRQ to the CPU core on which the corresponding device driver (the IRQ
client) is running.
This patch introduces new types for expressing CPU affinities. Instead
of dealing with physical CPU numbers, affinities are expressed as
rectangles in a grid of virtual CPU nodes. This clears the way to
conveniently assign sets of adjacent CPUs to subsystems, each of them
managing their respective viewport of the coordinate space.
By using 2D Cartesian coordinates, the locality of CPU nodes can be
modeled for different topologies such as SMP (simple Nx1 grid), grids of
NUMA nodes, or ring topologies.
r3 contains the recent Nova upstream kernel version plus the Genode specific
extensions and changes as known from r2.
Additionally, the r3 branch
* contains the assign_pci patch now directly,
* adds support for cross CPU IPC,
* fixes some issues with freeing up kernel memory part of r2 and
* update the documentation a bit.
Fixes#814
* read out supported number of CPUs
* start per CPU a thread
* monitor by main thread liveness of remote CPU threads
* add a round variable
* terminate run script after a specific round or after 90s
* on qemu wait 5 rounds, on native runs 40
Add run script to autopilot list
Issue #814
This avoids a deadlock if during issuing a printf the low level IPC fails.
. Printf uses an address space local lock and if we are trying again
to make a printf we deadlock forever ...
This patch eliminates the "no attachment at..." warnings, which
were caused by a use-after-free problem of dataspaces. When a
dataspace was destroyed, the users of the dataspace were not
informed and therefore could not revert possible attachments to
RM sessions. The fix introduces a callback mechanism that allows
dataspace users (i.e., RM regions) to register for the event that
a dataspace vanishes.
The following types of dataspaces are handled:
* RAM dataspaces
* ROM dataspaces
* The process binary
* The binary of the dynamic linker
* Args dataspace
* Sysio dataspace
* Env dataspace
* managed RM dataspaces
The handling of ROM dataspaces is still not complete. When forking,
the ROM dataspace of the parent process gets just reused without
creating proper meta data ('Dataspace_info') for the forked process.
Similar issues might arise from other special dataspaces (e.g.,
args, env, sysio).
This patch removes all "no attachment at..." warnings except for
one (an attachment at 0).
Issue #485
