I decided to split this from the rest of the Qemu RSS usage series as it contains the more or less non contentious patches.
I omitted the MAP_GROWSDOWN flag in mmap as we are not 100% sure which side effects it has. I kept the guard page which is now nicely makes the stacks visible in smaps. The old version of the relevent patch lacked the MAP_FIXED flag in the second call to mmap. The last patch which reduces the stack size of coroutines to 64kB may be omitted if its found to risky. Peter Lieven (6): oslib-posix: add helpers for stack alloc and free coroutine: add a macro for the coroutine stack size coroutine-ucontext: use helper for allocating stack memory coroutine-sigaltstack: use helper for allocating stack memory oslib-posix: add a configure switch to debug stack usage coroutine: reduce stack size to 64kB configure | 15 ++++++++++++ include/qemu/coroutine_int.h | 2 ++ include/sysemu/os-posix.h | 24 +++++++++++++++++++ util/coroutine-sigaltstack.c | 7 +++--- util/coroutine-ucontext.c | 9 ++++---- util/coroutine-win32.c | 2 +- util/oslib-posix.c | 55 ++++++++++++++++++++++++++++++++++++++++++++ 7 files changed, 104 insertions(+), 10 deletions(-) -- 1.9.1
