From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45229) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bK32S-00062z-Kg for qemu-devel@nongnu.org; Mon, 04 Jul 2016 08:31:49 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bK32O-0006To-Eb for qemu-devel@nongnu.org; Mon, 04 Jul 2016 08:31:47 -0400 Received: from mx-v6.kamp.de ([2a02:248:0:51::16]:57354 helo=mx01.kamp.de) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bK32O-0006TZ-4m for qemu-devel@nongnu.org; Mon, 04 Jul 2016 08:31:44 -0400 From: Peter Lieven Date: Mon, 4 Jul 2016 14:31:21 +0200 Message-Id: <1467635487-9329-1-git-send-email-pl@kamp.de> Subject: [Qemu-devel] [PATCH V2 0/6] coroutine: mmap stack memory and stack size List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, mreitz@redhat.com, pbonzini@redhat.com, mst@redhat.com, dgilbert@redhat.com, peter.maydell@linaro.org, eblake@redhat.com, rth@twiddle.net, Peter Lieven 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: 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