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[Qemu-devel] [PATCH V3 0/6] coroutine: mmap stack memory and stack size
From: |
Peter Lieven |
Subject: |
[Qemu-devel] [PATCH V3 0/6] coroutine: mmap stack memory and stack size |
Date: |
Thu, 7 Jul 2016 13:37:20 +0200 |
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.
v1->v2:
- Patch 1,6: adjusted commit message to mention the guard page [Markus]
v1->v2:
- Patch 1: added an architecture dependend guard page [Richard]
- Patch 1: avoid stacks smaller than _SC_THREAD_STACK_MIN [Richard]
- Patch 1: use mmap+mprotect instead of mmap+mmap [Richard]
- Patch 5: u_int32_t -> uint32_t [Richard]
- Patch 5: only available if stack grows down
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 | 19 +++++++++++
include/qemu/coroutine_int.h | 2 ++
include/sysemu/os-posix.h | 23 ++++++++++++++
util/coroutine-sigaltstack.c | 7 ++--
util/coroutine-ucontext.c | 9 +++---
util/coroutine-win32.c | 2 +-
util/oslib-posix.c | 76 ++++++++++++++++++++++++++++++++++++++++++++
7 files changed, 128 insertions(+), 10 deletions(-)
--
1.9.1
- [Qemu-devel] [PATCH V3 0/6] coroutine: mmap stack memory and stack size,
Peter Lieven <=
- [Qemu-devel] [PATCH V3 2/6] coroutine: add a macro for the coroutine stack size, Peter Lieven, 2016/07/07
- [Qemu-devel] [PATCH V3 1/6] oslib-posix: add helpers for stack alloc and free, Peter Lieven, 2016/07/07
- [Qemu-devel] [PATCH V3 6/6] coroutine: reduce stack size to 64kB, Peter Lieven, 2016/07/07
- [Qemu-devel] [PATCH V3 4/6] coroutine-sigaltstack: use helper for allocating stack memory, Peter Lieven, 2016/07/07
- [Qemu-devel] [PATCH V3 5/6] oslib-posix: add a configure switch to debug stack usage, Peter Lieven, 2016/07/07
- [Qemu-devel] [PATCH V3 3/6] coroutine-ucontext: use helper for allocating stack memory, Peter Lieven, 2016/07/07