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X-Received-From: 2a00:1450:4864:20::441 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Dr. David Alan Gilbert" Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Use WITH_RCU_READ_LOCK_GUARD to avoid exiting colo_init_ram_cache without releasing RCU. Cc: Dr. David Alan Gilbert Signed-off-by: Paolo Bonzini --- migration/ram.c | 33 +++++++++++++++++---------------- 1 file changed, 17 insertions(+), 16 deletions(-) diff --git a/migration/ram.c b/migration/ram.c index 7dd7f81..8d7c015 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -3891,26 +3891,27 @@ int colo_init_ram_cache(void) { RAMBlock *block; =20 - rcu_read_lock(); - RAMBLOCK_FOREACH_NOT_IGNORED(block) { - block->colo_cache =3D qemu_anon_ram_alloc(block->used_length, - NULL, - false); - if (!block->colo_cache) { - error_report("%s: Can't alloc memory for COLO cache of block %= s," - "size 0x" RAM_ADDR_FMT, __func__, block->idstr, - block->used_length); - RAMBLOCK_FOREACH_NOT_IGNORED(block) { - if (block->colo_cache) { - qemu_anon_ram_free(block->colo_cache, block->used_leng= th); - block->colo_cache =3D NULL; + WITH_RCU_READ_LOCK_GUARD() { + RAMBLOCK_FOREACH_NOT_IGNORED(block) { + block->colo_cache =3D qemu_anon_ram_alloc(block->used_length, + NULL, + false); + if (!block->colo_cache) { + error_report("%s: Can't alloc memory for COLO cache of blo= ck %s," + "size 0x" RAM_ADDR_FMT, __func__, block->idst= r, + block->used_length); + RAMBLOCK_FOREACH_NOT_IGNORED(block) { + if (block->colo_cache) { + qemu_anon_ram_free(block->colo_cache, block->used_= length); + block->colo_cache =3D NULL; + } } + return -errno; } - return -errno; + memcpy(block->colo_cache, block->host, block->used_length); } - memcpy(block->colo_cache, block->host, block->used_length); } - rcu_read_unlock(); + /* * Record the dirty pages that sent by PVM, we use this dirty bitmap to= gether * with to decide which page in cache should be flushed into SVM's RAM.= Here --=20 1.8.3.1