search for: reserved

I have a system with several reserved ranges low in the e820 map which cause problems when starting PV domains with PCI devices. The machine memory map looks like: (XEN) 0000000000000000 - 0000000000060000 (usable) (XEN) 0000000000060000 - 0000000000068000 (reserved) (XEN) 0000000000068000 - 000000000009ac00 (usable) (XEN) 0000000...

Lately I have had a few discussions of what it means for a register to be unallocatable or reserved. As this comes up every now and again and I often struggled answering such questions I decided to write down some definite rules and codify the current usage and assumptions. I plan to put the rules below into the doxygen comments of MachineRegisterInfo etc. And I also hope that people will correct...

Hello all, I am currently writing model tests in rails 4. I am attempting to add an error to a reservation object if the total number of reservations for a given date and time has reached a pre-determined limit. When my test runs, it is hitting the appropriate code but it is raising the following error as opposed to just giving me an error in the object that I can use.

Hi, I'm writing to ask the differences between a "reserved" register and an "unallocable" register. In X86 backend, for example, the stack pointer register and instruction pointer are reserved but allocatable. In the Doxygen document of function llvm::TargetRegisterInfo::getReservedRegs, it says that a reserved register is one that *has part...

We have been using bytes_reserved for metadata reservations, which is wrong since we use that to keep track of outstanding reservations from the allocator. This resulted in us doing a lot of silly things to make sure we don''t allocate a bunch of metadata chunks since we never had a real view of how much space was actually...

We have been using bytes_reserved for metadata reservations, which is wrong since we use that to keep track of outstanding reservations from the allocator. This resulted in us doing a lot of silly things to make sure we don''t allocate a bunch of metadata chunks since we never had a real view of how much space was actually...

Hey all, I've found a bug in either the PBQP register allocator or in VirtRegRewriter. I'm observing this assertion in VirtRegRewriter::rewrite() fail: unsigned VirtReg = MO.getReg(); unsigned PhysReg = VRM->getPhys(VirtReg); ... assert(!MRI->isReserved(PhysReg) && "Reserved register assignment"); Indeed there is a case where PhysReg may be a reserved physical register. Specificially, RegAllocPBQP::finalizeAlloc() may select a physical register thusly: const TargetRegisterClass &RC = *MRI.getRegClass(LI.reg); P...

On Apr 17, 2012, at 9:09 PM, Lei Mou wrote: > I'm writing to ask the differences between a "reserved" register and an "unallocable" register. In X86 backend, for example, the stack pointer register and instruction pointer are reserved but allocatable. In the Doxygen document of function llvm::TargetRegisterInfo::getReservedRegs, it says that a reserved register is one that has parti...

> On Feb 25, 2016, at 6:14 PM, Matthias Braun <mbraun at apple.com> wrote: > > Lately I have had a few discussions of what it means for a register to be unallocatable or reserved. As this comes up every now and again and I often struggled answering such questions I decided to write down some definite rules and codify the current usage and assumptions. I plan to put the rules below into the doxygen comments of MachineRegisterInfo etc. And I also hope that people will correct...

When I pass an empty string for cpu and features to createTargetMachine, and then use LLVMGetTargetMachineCPU() and LLVMGetTargetMachineFeatureString() to get the strings back, they are still empty. Is there a way to have llvm compute the effective cpu/features string, and provide it so that I can inspect it? I'm trying to figure out how the cpu/features string that I am explicitly passing,

Has anyone had any luck getting the Avaya IP SoftPhone to work in wine? I get these errors on Ubuntu 8 Code: preloader: Warning: failed to reserve range 00000000-60000000 wine: creating configuration directory '/home/microchp/.wine'... preloader: Warning: failed to reserve range 00000000-60000000 preloader: Warning: failed to reserve range 00000000-60000000 err:dosmem:setup_dos_mem

Hi All, Whenever an EXT3 partition is created some space is reserved for super-user, I used the mkfs.ext3 with option -m set to 0, but there is no effect it still reserve the space. How can i set the reserved-space to 0 or calculate the reserved-space in advance? Any suggestion/idea? Regards, -------------- next part -------------- An HTML attachment was scrubbe...

...h applies to v3.9-rc1. It introduces following common helper functions to simplify free_initmem() and free_initrd_mem() on different architectures: adjust_managed_page_count(): will be used to adjust totalram_pages, totalhigh_pages, zone->managed_pages when reserving/unresering a page. __free_reserved_page(): free a reserved page into the buddy system without adjusting page statistics info free_reserved_page(): free a reserved page into the buddy system and adjust page statistics info mark_page_reserved(): mark a page as reserved and adjust page statistics info free_reserved_area(): free a...

...h applies to v3.9-rc1. It introduces following common helper functions to simplify free_initmem() and free_initrd_mem() on different architectures: adjust_managed_page_count(): will be used to adjust totalram_pages, totalhigh_pages, zone->managed_pages when reserving/unresering a page. __free_reserved_page(): free a reserved page into the buddy system without adjusting page statistics info free_reserved_page(): free a reserved page into the buddy system and adjust page statistics info mark_page_reserved(): mark a page as reserved and adjust page statistics info free_reserved_area(): free a...

...ject". As part of the > preliminary investigations of this project and verification of the > data by the IANA some /8s previously listed as "Various Registries" > have now been designated as unused and as such will be listed in the > IANA registries as "IANA Reserved". > > This update will take effect at > > http://www.iana.org/assignments/ipv4-address-space > > as of 23:59 UTC, 31 March 2003. > > > The affected /8s will be listed as follows: > > 173/8 Apr 03 IANA - Reserved > 174/8 Apr 03 IANA - Reserved...

Let's try this again after some longer offline discussions: = Reserved Registers = The primary use of reserved registers is to hold values required by runtime conventions. Typical examples are the stack pointer, frame pointer maybe TLS base address, GOT address ... Zero registers and program counters are an odd special case for which we may be able to provide looser r...

> On Feb 25, 2016, at 9:24 PM, Andrew Trick <atrick at apple.com> wrote: > > >> On Feb 25, 2016, at 6:14 PM, Matthias Braun <mbraun at apple.com> wrote: >> >> Lately I have had a few discussions of what it means for a register to be unallocatable or reserved. As this comes up every now and again and I often struggled answering such questions I decided to write down some definite rules and codify the current usage and assumptions. I plan to put the rules below into the doxygen comments of MachineRegisterInfo etc. And I also hope that people will correct...

On 02/25/2016 06:14 PM, Matthias Braun via llvm-dev wrote: > 1) The value read from a reserved register cannot be predicted. Reading a reserved register twice may each time produce a different result. This seems broken to me that treating another copy should be assumed to produce a different result. This seems like it should be optimized, and have a special volatile_copy instruction for th...

...--------- --- usr/share/shorewall/bogons.old 2004-04-19 18:28:00.000000000 +0300 +++ usr/share/shorewall/bogons 2004-04-20 20:32:29.000000000 +0300 @@ -46,13 +46,18 @@ 49.0.0.0/8 logdrop # JTC - Returned to IANA Mar 98 50.0.0.0/8 logdrop # JTC - Returned to IANA Mar 98 58.0.0.0/7 logdrop # Reserved -70.0.0.0/7 logdrop # Reserved +71.0.0.0/8 logdrop # Reserved 72.0.0.0/5 logdrop # Reserved -85.0.0.0/8 logdrop # Reserved -86.0.0.0/7 logdrop # Reserved -88.0.0.0/5 logdrop # Reserved +89.0.0.0/8 logdrop # Reserved +90.0.0.0/7 logdrop # Reserved +92.0.0.0/6 logdrop # Reserved 9...

Hi Matthias, This pretty much matches my memory. I think that the rules are a bit ad hoc and not followed to the letter everywhere. It would be good to codify something concrete. I thought that I added some way of distinguishing between constant registers and other reserved registers but I can’t find it now. We do some register coalescing that is not consistent with your rules here: If a virtual register is defined as a copy of a constant register, we will replace the virtual register with the constant register. See RegisterCoalescer::canJoinPhys(). This can mean the...