From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:41195) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TF3uC-0001Ma-F8 for qemu-devel@nongnu.org; Fri, 21 Sep 2012 10:08:38 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TF3u6-0007Gq-E0 for qemu-devel@nongnu.org; Fri, 21 Sep 2012 10:08:32 -0400 Received: from mx1.redhat.com ([209.132.183.28]:3671) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TF3u6-0007Gb-65 for qemu-devel@nongnu.org; Fri, 21 Sep 2012 10:08:26 -0400 Received: from int-mx01.intmail.prod.int.phx2.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q8LE8Pdm002019 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Fri, 21 Sep 2012 10:08:25 -0400 From: Juan Quintela Date: Fri, 21 Sep 2012 16:08:07 +0200 Message-Id: <1348236500-2565-2-git-send-email-quintela@redhat.com> In-Reply-To: <1348236500-2565-1-git-send-email-quintela@redhat.com> References: <1348236500-2565-1-git-send-email-quintela@redhat.com> Subject: [Qemu-devel] [PATCH 01/14] split MRU ram list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Paolo Bonzini From: Paolo Bonzini Outside the execution threads the normal, non-MRU-ized order of the RAM blocks should always be enough. So manage two separate lists, which will have separate locking rules. Signed-off-by: Paolo Bonzini Signed-off-by: Juan Quintela --- cpu-all.h | 4 +++- exec.c | 16 +++++++++++----- 2 files changed, 14 insertions(+), 6 deletions(-) diff --git a/cpu-all.h b/cpu-all.h index db25f73..3e67019 100644 --- a/cpu-all.h +++ b/cpu-all.h @@ -487,8 +487,9 @@ typedef struct RAMBlock { ram_addr_t offset; ram_addr_t length; uint32_t flags; - char idstr[256]; + QLIST_ENTRY(RAMBlock) next_mru; QLIST_ENTRY(RAMBlock) next; + char idstr[256]; #if defined(__linux__) && !defined(TARGET_S390X) int fd; #endif @@ -496,6 +497,7 @@ typedef struct RAMBlock { typedef struct RAMList { uint8_t *phys_dirty; + QLIST_HEAD(, RAMBlock) blocks_mru; QLIST_HEAD(, RAMBlock) blocks; } RAMList; extern RAMList ram_list; diff --git a/exec.c b/exec.c index ad2cc2e..0db2beb 100644 --- a/exec.c +++ b/exec.c @@ -112,7 +112,10 @@ static uint8_t *code_gen_ptr; int phys_ram_fd; static int in_migration; -RAMList ram_list = { .blocks = QLIST_HEAD_INITIALIZER(ram_list.blocks) }; +RAMList ram_list = { + .blocks = QLIST_HEAD_INITIALIZER(ram_list.blocks), + .blocks_mru = QLIST_HEAD_INITIALIZER(ram_list.blocks_mru) +}; static MemoryRegion *system_memory; static MemoryRegion *system_io; @@ -2578,6 +2581,7 @@ ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host, new_block->length = size; QLIST_INSERT_HEAD(&ram_list.blocks, new_block, next); + QLIST_INSERT_HEAD(&ram_list.blocks_mru, new_block, next_mru); ram_list.phys_dirty = g_realloc(ram_list.phys_dirty, last_ram_offset() >> TARGET_PAGE_BITS); @@ -2605,6 +2609,7 @@ void qemu_ram_free_from_ptr(ram_addr_t addr) QLIST_FOREACH(block, &ram_list.blocks, next) { if (addr == block->offset) { QLIST_REMOVE(block, next); + QLIST_REMOVE(block, next_mru); g_free(block); return; } @@ -2618,6 +2623,7 @@ void qemu_ram_free(ram_addr_t addr) QLIST_FOREACH(block, &ram_list.blocks, next) { if (addr == block->offset) { QLIST_REMOVE(block, next); + QLIST_REMOVE(block, next_mru); if (block->flags & RAM_PREALLOC_MASK) { ; } else if (mem_path) { @@ -2723,12 +2729,12 @@ void *qemu_get_ram_ptr(ram_addr_t addr) { RAMBlock *block; - QLIST_FOREACH(block, &ram_list.blocks, next) { + QLIST_FOREACH(block, &ram_list.blocks_mru, next_mru) { if (addr - block->offset < block->length) { /* Move this entry to to start of the list. */ if (block != QLIST_FIRST(&ram_list.blocks)) { - QLIST_REMOVE(block, next); - QLIST_INSERT_HEAD(&ram_list.blocks, block, next); + QLIST_REMOVE(block, next_mru); + QLIST_INSERT_HEAD(&ram_list.blocks_mru, block, next_mru); } if (xen_enabled()) { /* We need to check if the requested address is in the RAM @@ -2823,7 +2829,7 @@ int qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr) return 0; } - QLIST_FOREACH(block, &ram_list.blocks, next) { + QLIST_FOREACH(block, &ram_list.blocks_mru, next_mru) { /* This case append when the block is not mapped. */ if (block->host == NULL) { continue; -- 1.7.11.4