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Berrange" , Markus Armbruster , Steve Sistare Subject: [PATCH V6 10/24] hostmem-shm: preserve for cpr Date: Tue, 14 Jan 2025 09:23:40 -0800 Message-Id: <1736875434-106563-11-git-send-email-steven.sistare@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1736875434-106563-1-git-send-email-steven.sistare@oracle.com> References: <1736875434-106563-1-git-send-email-steven.sistare@oracle.com> X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-01-14_05,2025-01-13_02,2024-11-22_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 adultscore=0 spamscore=0 suspectscore=0 phishscore=0 malwarescore=0 mlxscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2411120000 definitions=main-2501140133 X-Proofpoint-GUID: Sj86AnrpK3h4FTx4YyE9moPQ1r5kCdmX X-Proofpoint-ORIG-GUID: Sj86AnrpK3h4FTx4YyE9moPQ1r5kCdmX Received-SPF: pass client-ip=205.220.177.32; envelope-from=steven.sistare@oracle.com; helo=mx0b-00069f02.pphosted.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Preserve memory-backend-shm memory objects during cpr-transfer. Signed-off-by: Steve Sistare Reviewed-by: Peter Xu --- backends/hostmem-shm.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/backends/hostmem-shm.c b/backends/hostmem-shm.c index fabee41..f67ad27 100644 --- a/backends/hostmem-shm.c +++ b/backends/hostmem-shm.c @@ -13,6 +13,7 @@ #include "qemu/osdep.h" #include "system/hostmem.h" #include "qapi/error.h" +#include "migration/cpr.h" #define TYPE_MEMORY_BACKEND_SHM "memory-backend-shm" @@ -25,9 +26,9 @@ struct HostMemoryBackendShm { static bool shm_backend_memory_alloc(HostMemoryBackend *backend, Error **errp) { - g_autofree char *backend_name = NULL; + g_autofree char *backend_name = host_memory_backend_get_name(backend); uint32_t ram_flags; - int fd; + int fd = cpr_find_fd(backend_name, 0); if (!backend->size) { error_setg(errp, "can't create shm backend with size 0"); @@ -39,13 +40,18 @@ shm_backend_memory_alloc(HostMemoryBackend *backend, Error **errp) return false; } + if (fd >= 0) { + goto have_fd; + } + fd = qemu_shm_alloc(backend->size, errp); if (fd < 0) { return false; } + cpr_save_fd(backend_name, 0, fd); +have_fd: /* Let's do the same as memory-backend-ram,share=on would do. */ - backend_name = host_memory_backend_get_name(backend); ram_flags = RAM_SHARED; ram_flags |= backend->reserve ? 0 : RAM_NORESERVE;