From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:41088) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fArVJ-0000vr-6v for qemu-devel@nongnu.org; Tue, 24 Apr 2018 02:32:41 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fArVF-0007LS-SM for qemu-devel@nongnu.org; Tue, 24 Apr 2018 02:32:41 -0400 Received: from mga07.intel.com ([134.134.136.100]:19343) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fArVF-0007Ky-IE for qemu-devel@nongnu.org; Tue, 24 Apr 2018 02:32:37 -0400 From: Wei Wang Date: Tue, 24 Apr 2018 14:13:45 +0800 Message-Id: <1524550428-27173-3-git-send-email-wei.w.wang@intel.com> In-Reply-To: <1524550428-27173-1-git-send-email-wei.w.wang@intel.com> References: <1524550428-27173-1-git-send-email-wei.w.wang@intel.com> Subject: [Qemu-devel] [PATCH v7 2/5] migration: use bitmap_mutex in migration_bitmap_clear_dirty List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, virtio-dev@lists.oasis-open.org, mst@redhat.com, quintela@redhat.com, dgilbert@redhat.com Cc: pbonzini@redhat.com, wei.w.wang@intel.com, liliang.opensource@gmail.com, yang.zhang.wz@gmail.com, quan.xu0@gmail.com, nilal@redhat.com, riel@redhat.com The bitmap mutex is used to synchronize threads to update the dirty bitmap and the migration_dirty_pages counter. This patch makes migration_bitmap_clear_dirty update the bitmap and counter under the mutex. Signed-off-by: Wei Wang CC: Dr. David Alan Gilbert CC: Juan Quintela CC: Michael S. Tsirkin --- migration/ram.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/migration/ram.c b/migration/ram.c index 0e90efa..9a72b1a 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -795,11 +795,14 @@ static inline bool migration_bitmap_clear_dirty(RAMState *rs, { bool ret; + qemu_mutex_lock(&rs->bitmap_mutex); ret = test_and_clear_bit(page, rb->bmap); if (ret) { rs->migration_dirty_pages--; } + qemu_mutex_unlock(&rs->bitmap_mutex); + return ret; } -- 1.8.3.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: virtio-dev-return-3944-cohuck=redhat.com@lists.oasis-open.org Sender: List-Post: List-Help: List-Unsubscribe: List-Subscribe: Received: from lists.oasis-open.org (oasis-open.org [66.179.20.138]) by lists.oasis-open.org (Postfix) with ESMTP id 14AD75818FAC for ; Mon, 23 Apr 2018 23:32:37 -0700 (PDT) From: Wei Wang Date: Tue, 24 Apr 2018 14:13:45 +0800 Message-Id: <1524550428-27173-3-git-send-email-wei.w.wang@intel.com> In-Reply-To: <1524550428-27173-1-git-send-email-wei.w.wang@intel.com> References: <1524550428-27173-1-git-send-email-wei.w.wang@intel.com> Subject: [virtio-dev] [PATCH v7 2/5] migration: use bitmap_mutex in migration_bitmap_clear_dirty To: qemu-devel@nongnu.org, virtio-dev@lists.oasis-open.org, mst@redhat.com, quintela@redhat.com, dgilbert@redhat.com Cc: pbonzini@redhat.com, wei.w.wang@intel.com, liliang.opensource@gmail.com, yang.zhang.wz@gmail.com, quan.xu0@gmail.com, nilal@redhat.com, riel@redhat.com List-ID: The bitmap mutex is used to synchronize threads to update the dirty bitmap and the migration_dirty_pages counter. This patch makes migration_bitmap_clear_dirty update the bitmap and counter under the mutex. Signed-off-by: Wei Wang CC: Dr. David Alan Gilbert CC: Juan Quintela CC: Michael S. Tsirkin --- migration/ram.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/migration/ram.c b/migration/ram.c index 0e90efa..9a72b1a 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -795,11 +795,14 @@ static inline bool migration_bitmap_clear_dirty(RAMState *rs, { bool ret; + qemu_mutex_lock(&rs->bitmap_mutex); ret = test_and_clear_bit(page, rb->bmap); if (ret) { rs->migration_dirty_pages--; } + qemu_mutex_unlock(&rs->bitmap_mutex); + return ret; } -- 1.8.3.1 --------------------------------------------------------------------- To unsubscribe, e-mail: virtio-dev-unsubscribe@lists.oasis-open.org For additional commands, e-mail: virtio-dev-help@lists.oasis-open.org