This is a summary of discussions we had on IRC between kernel and toolchain
engineers regarding support for JITs and 52-bit virtual address space (mostly
in the context of LuaJIT, but this concerns other JITs too).
The summary is that we need to consider ways of reducing the size of VA for a
gi
On Thursday 28 April 2016 16:00:22 Maxim Kuvyrkov wrote:
> This is a summary of discussions we had on IRC between kernel and toolchain
> engineers regarding support for JITs and 52-bit virtual address space (mostly
> in the context of LuaJIT, but this concerns other JITs too).
>
> The summary is
On 28 April 2016 at 14:17, Arnd Bergmann wrote:
> One simple (from the kernel's perspective, not from the JIT) approach
> might be to always use MAP_FIXED whenever an allocation is made for
> memory that needs these special pointers, and then manage the available
> address space explicitly. Would
FWIW: OpenJDK assumes 48 bit virtual address. There is no inherent
reason for this other than we do
movz/movk/movk
to form an address. It is relatively trivial to change this to
movz/movk/movk/movk
All the best,
Ed.
On 28 April 2016 at 14:00, Maxim Kuvyrkov wrote:
> This is a summary of dis
Digital circuits are made from analog parts.
-- Don Vonada
The Linaro 16.04 release is now available for download!
Both LSK and LNG tarball releases have been discontinued this cycle
and the preferred way of procuring a release is through
git.linaro.org.
Using the Android-based i
I do not think this issue is inherent to all JIT implements, but rather to
luajit with its NaN-tagging scheme [1] which packs different types of objects
in a 8-byte. It works well with x86_64 that limits the VMA to 47-bits, but
things get messy with large VMA support. Luajit work around this issue
On 28 April 2016 at 14:24, Peter Maydell wrote:
> On 28 April 2016 at 14:17, Arnd Bergmann wrote:
>> One simple (from the kernel's perspective, not from the JIT) approach
>> might be to always use MAP_FIXED whenever an allocation is made for
>> memory that needs these special pointers, and then m
+++ Adhemerval Zanella [2016-04-28 12:07 -0300]:
> I do not think this issue is inherent to all JIT implements, but rather to
> luajit with its NaN-tagging scheme [1] which packs different types of objects
> in a 8-byte.
Other jits use the same/similar schemes (mozilla's ionmonkey is one
AIUI). N
