From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57217) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1abjdK-0001Yb-K2 for qemu-devel@nongnu.org; Fri, 04 Mar 2016 01:54:43 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1abjdG-0005SB-Ge for qemu-devel@nongnu.org; Fri, 04 Mar 2016 01:54:42 -0500 Received: from e28smtp02.in.ibm.com ([125.16.236.2]:38147) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1abjdF-0005S0-Pp for qemu-devel@nongnu.org; Fri, 04 Mar 2016 01:54:38 -0500 Received: from localhost by e28smtp02.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 4 Mar 2016 12:24:33 +0530 From: Bharata B Rao Date: Fri, 4 Mar 2016 12:24:12 +0530 Message-Id: <1457074461-14285-2-git-send-email-bharata@linux.vnet.ibm.com> In-Reply-To: <1457074461-14285-1-git-send-email-bharata@linux.vnet.ibm.com> References: <1457074461-14285-1-git-send-email-bharata@linux.vnet.ibm.com> Subject: [Qemu-devel] [RFC PATCH v1 01/10] exec: Remove cpu from cpus list during cpu_exec_exit() List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: mjrosato@linux.vnet.ibm.com, thuth@redhat.com, pkrempa@redhat.com, ehabkost@redhat.com, aik@ozlabs.ru, Bharata B Rao , armbru@redhat.com, agraf@suse.de, borntraeger@de.ibm.com, qemu-ppc@nongnu.org, pbonzini@redhat.com, imammedo@redhat.com, mdroth@linux.vnet.ibm.com, afaerber@suse.de, david@gibson.dropbear.id.au CPUState *cpu gets added to the cpus list during cpu_exec_init(). It should be removed from cpu_exec_exit(). cpu_exec_init() is called from generic CPU::instance_finalize and some archs like PowerPC call it from CPU unrealizefn. So ensure that we dequeue the cpu only once. Now -1 value for cpu->cpu_index indicates that we have already dequeued the cpu for CONFIG_USER_ONLY case also. Signed-off-by: Bharata B Rao --- exec.c | 32 ++++++++++++++++++++++++-------- 1 file changed, 24 insertions(+), 8 deletions(-) diff --git a/exec.c b/exec.c index c62c439..7c3f747 100644 --- a/exec.c +++ b/exec.c @@ -588,15 +588,9 @@ static int cpu_get_free_index(Error **errp) return cpu; } -void cpu_exec_exit(CPUState *cpu) +static void cpu_release_index(CPUState *cpu) { - if (cpu->cpu_index == -1) { - /* cpu_index was never allocated by this @cpu or was already freed. */ - return; - } - bitmap_clear(cpu_index_map, cpu->cpu_index, 1); - cpu->cpu_index = -1; } #else @@ -611,11 +605,33 @@ static int cpu_get_free_index(Error **errp) return cpu_index; } -void cpu_exec_exit(CPUState *cpu) +static void cpu_release_index(CPUState *cpu) { + return; } #endif +void cpu_exec_exit(CPUState *cpu) +{ +#if defined(CONFIG_USER_ONLY) + cpu_list_lock(); +#endif + if (cpu->cpu_index == -1) { + /* cpu_index was never allocated by this @cpu or was already freed. */ +#if defined(CONFIG_USER_ONLY) + cpu_list_unlock(); +#endif + return; + } + + QTAILQ_REMOVE(&cpus, cpu, node); + cpu_release_index(cpu); + cpu->cpu_index = -1; +#if defined(CONFIG_USER_ONLY) + cpu_list_unlock(); +#endif +} + void cpu_exec_init(CPUState *cpu, Error **errp) { CPUClass *cc = CPU_GET_CLASS(cpu); -- 2.1.0