From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:41135) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UZMMP-0004UF-Fq for qemu-devel@nongnu.org; Mon, 06 May 2013 10:25:51 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UZMMN-0005S7-TM for qemu-devel@nongnu.org; Mon, 06 May 2013 10:25:49 -0400 Received: from mail-ee0-f49.google.com ([74.125.83.49]:61624) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UZMMN-0005Rr-CI for qemu-devel@nongnu.org; Mon, 06 May 2013 10:25:47 -0400 Received: by mail-ee0-f49.google.com with SMTP id c41so1764469eek.22 for ; Mon, 06 May 2013 07:25:46 -0700 (PDT) Sender: Paolo Bonzini From: Paolo Bonzini Date: Mon, 6 May 2013 16:25:15 +0200 Message-Id: <1367850321-1732-3-git-send-email-pbonzini@redhat.com> In-Reply-To: <1367850321-1732-1-git-send-email-pbonzini@redhat.com> References: <1367850321-1732-1-git-send-email-pbonzini@redhat.com> Subject: [Qemu-devel] [RFC PATCH 2/8] exec: check MRU in qemu_ram_addr_from_host List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: jan.kiszka@siemens.com, qemulist@gmail.com, stefanha@redhat.com This function is not used outside the iothread mutex, so it can use ram_list.mru_block. Signed-off-by: Paolo Bonzini --- exec.c | 12 ++++++++++-- 1 files changed, 10 insertions(+), 2 deletions(-) diff --git a/exec.c b/exec.c index 9f324bb..8e46228 100644 --- a/exec.c +++ b/exec.c @@ -1404,18 +1404,26 @@ int qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr) return 0; } + block = ram_list.mru_block; + if (block && block->host && host - block->host < block->length) { + goto found; + } + QTAILQ_FOREACH(block, &ram_list.blocks, next) { /* This case append when the block is not mapped. */ if (block->host == NULL) { continue; } if (host - block->host < block->length) { - *ram_addr = block->offset + (host - block->host); - return 0; + goto found; } } return -1; + +found: + *ram_addr = block->offset + (host - block->host); + return 0; } /* Some of the softmmu routines need to translate from a host pointer -- 1.7.1