From nobody Thu Nov 6 05:41:44 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 149320529577810.82369950813063; Wed, 26 Apr 2017 04:14:55 -0700 (PDT) Received: from localhost ([::1]:54327 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3KuM-0005tb-Ix for importer@patchew.org; Wed, 26 Apr 2017 07:14:54 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35979) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3Kt1-00052u-Q9 for qemu-devel@nongnu.org; Wed, 26 Apr 2017 07:13:33 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d3Kt0-0002ys-Fg for qemu-devel@nongnu.org; Wed, 26 Apr 2017 07:13:31 -0400 Received: from mx1.redhat.com ([209.132.183.28]:50084) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1d3Kt0-0002yV-6a for qemu-devel@nongnu.org; Wed, 26 Apr 2017 07:13:30 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 2A359C04B926 for ; Wed, 26 Apr 2017 11:13:29 +0000 (UTC) Received: from pxdev.xzpeter.org.com (ovpn-8-40.pek2.redhat.com [10.72.8.40]) by smtp.corp.redhat.com (Postfix) with ESMTP id 383EA7F8A9; Wed, 26 Apr 2017 11:13:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 2A359C04B926 Authentication-Results: ext-mx07.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx07.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=peterx@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 2A359C04B926 From: Peter Xu To: qemu-devel@nongnu.org Date: Wed, 26 Apr 2017 19:13:11 +0800 Message-Id: <1493205192-26743-2-git-send-email-peterx@redhat.com> In-Reply-To: <1493205192-26743-1-git-send-email-peterx@redhat.com> References: <1493205192-26743-1-git-send-email-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Wed, 26 Apr 2017 11:13:29 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2 1/2] ramblock: add RAMBLOCK_FOREACH() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini , "Dr. David Alan Gilbert" , peterx@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" So that it can simplifies the iterators. Signed-off-by: Peter Xu --- exec.c | 22 +++++++++++----------- include/exec/ramlist.h | 5 +++++ migration/ram.c | 15 ++++++++------- 3 files changed, 24 insertions(+), 18 deletions(-) diff --git a/exec.c b/exec.c index eac6085..50519ae 100644 --- a/exec.c +++ b/exec.c @@ -978,7 +978,7 @@ static RAMBlock *qemu_get_ram_block(ram_addr_t addr) if (block && addr - block->offset < block->max_length) { return block; } - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { + RAMBLOCK_FOREACH(block) { if (addr - block->offset < block->max_length) { goto found; } @@ -1578,12 +1578,12 @@ static ram_addr_t find_ram_offset(ram_addr_t size) return 0; } =20 - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { + RAMBLOCK_FOREACH(block) { ram_addr_t end, next =3D RAM_ADDR_MAX; =20 end =3D block->offset + block->max_length; =20 - QLIST_FOREACH_RCU(next_block, &ram_list.blocks, next) { + RAMBLOCK_FOREACH(next_block) { if (next_block->offset >=3D end) { next =3D MIN(next, next_block->offset); } @@ -1609,7 +1609,7 @@ unsigned long last_ram_page(void) ram_addr_t last =3D 0; =20 rcu_read_lock(); - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { + RAMBLOCK_FOREACH(block) { last =3D MAX(last, block->offset + block->max_length); } rcu_read_unlock(); @@ -1659,7 +1659,7 @@ void qemu_ram_set_idstr(RAMBlock *new_block, const ch= ar *name, DeviceState *dev) pstrcat(new_block->idstr, sizeof(new_block->idstr), name); =20 rcu_read_lock(); - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { + RAMBLOCK_FOREACH(block) { if (block !=3D new_block && !strcmp(block->idstr, new_block->idstr)) { fprintf(stderr, "RAMBlock \"%s\" already registered, abort!\n", @@ -1693,7 +1693,7 @@ size_t qemu_ram_pagesize_largest(void) RAMBlock *block; size_t largest =3D 0; =20 - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { + RAMBLOCK_FOREACH(block) { largest =3D MAX(largest, qemu_ram_pagesize(block)); } =20 @@ -1839,7 +1839,7 @@ static void ram_block_add(RAMBlock *new_block, Error = **errp) * QLIST (which has an RCU-friendly variant) does not have insertion at * tail, so save the last element in last_block. */ - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { + RAMBLOCK_FOREACH(block) { last_block =3D block; if (block->max_length < new_block->max_length) { break; @@ -2021,7 +2021,7 @@ void qemu_ram_remap(ram_addr_t addr, ram_addr_t lengt= h) int flags; void *area, *vaddr; =20 - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { + RAMBLOCK_FOREACH(block) { offset =3D addr - block->offset; if (offset < block->max_length) { vaddr =3D ramblock_ptr(block, offset); @@ -2167,7 +2167,7 @@ RAMBlock *qemu_ram_block_from_host(void *ptr, bool ro= und_offset, goto found; } =20 - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { + RAMBLOCK_FOREACH(block) { /* This case append when the block is not mapped. */ if (block->host =3D=3D NULL) { continue; @@ -2200,7 +2200,7 @@ RAMBlock *qemu_ram_block_by_name(const char *name) { RAMBlock *block; =20 - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { + RAMBLOCK_FOREACH(block) { if (!strcmp(name, block->idstr)) { return block; } @@ -3424,7 +3424,7 @@ int qemu_ram_foreach_block(RAMBlockIterFunc func, voi= d *opaque) int ret =3D 0; =20 rcu_read_lock(); - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { + RAMBLOCK_FOREACH(block) { ret =3D func(block->idstr, block->host, block->offset, block->used_length, opaque); if (ret) { diff --git a/include/exec/ramlist.h b/include/exec/ramlist.h index c59880d..f1c6b45 100644 --- a/include/exec/ramlist.h +++ b/include/exec/ramlist.h @@ -4,6 +4,7 @@ #include "qemu/queue.h" #include "qemu/thread.h" #include "qemu/rcu.h" +#include "qemu/rcu_queue.h" =20 typedef struct RAMBlockNotifier RAMBlockNotifier; =20 @@ -54,6 +55,10 @@ typedef struct RAMList { } RAMList; extern RAMList ram_list; =20 +/* Should be holding either ram_list.mutex, or the RCU lock. */ +#define RAMBLOCK_FOREACH(block) \ + QLIST_FOREACH_RCU(block, &ram_list.blocks, next) + void qemu_mutex_lock_ramlist(void); void qemu_mutex_unlock_ramlist(void); =20 diff --git a/migration/ram.c b/migration/ram.c index f48664e..7ba5d7e 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -672,7 +672,7 @@ uint64_t ram_pagesize_summary(void) RAMBlock *block; uint64_t summary =3D 0; =20 - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { + RAMBLOCK_FOREACH(block) { summary |=3D block->page_size; } =20 @@ -700,7 +700,7 @@ static void migration_bitmap_sync(RAMState *rs) =20 qemu_mutex_lock(&rs->bitmap_mutex); rcu_read_lock(); - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { + RAMBLOCK_FOREACH(block) { migration_bitmap_sync_range(rs, block, 0, block->used_length); } rcu_read_unlock(); @@ -1439,8 +1439,9 @@ uint64_t ram_bytes_total(void) uint64_t total =3D 0; =20 rcu_read_lock(); - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) + RAMBLOCK_FOREACH(block) { total +=3D block->used_length; + } rcu_read_unlock(); return total; } @@ -1543,7 +1544,7 @@ void ram_postcopy_migrated_memory_release(MigrationSt= ate *ms) struct RAMBlock *block; unsigned long *bitmap =3D atomic_rcu_read(&rs->ram_bitmap)->bmap; =20 - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { + RAMBLOCK_FOREACH(block) { unsigned long first =3D block->offset >> TARGET_PAGE_BITS; unsigned long range =3D first + (block->used_length >> TARGET_PAGE= _BITS); unsigned long run_start =3D find_next_zero_bit(bitmap, range, firs= t); @@ -1624,7 +1625,7 @@ static int postcopy_each_ram_send_discard(MigrationSt= ate *ms) struct RAMBlock *block; int ret; =20 - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { + RAMBLOCK_FOREACH(block) { unsigned long first =3D block->offset >> TARGET_PAGE_BITS; PostcopyDiscardState *pds =3D postcopy_discard_send_init(ms, first, @@ -1802,7 +1803,7 @@ static int postcopy_chunk_hostpages(MigrationState *m= s) rs->last_sent_block =3D NULL; rs->last_page =3D 0; =20 - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { + RAMBLOCK_FOREACH(block) { unsigned long first =3D block->offset >> TARGET_PAGE_BITS; =20 PostcopyDiscardState *pds =3D @@ -2021,7 +2022,7 @@ static int ram_save_setup(QEMUFile *f, void *opaque) =20 qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE); =20 - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { + RAMBLOCK_FOREACH(block) { qemu_put_byte(f, strlen(block->idstr)); qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr)); qemu_put_be64(f, block->used_length); --=20 2.7.4