From: David Hildenbrand <david@redhat.com>
To: qemu-devel@nongnu.org
Cc: David Hildenbrand <david@redhat.com>,
"Michael S . Tsirkin" <mst@redhat.com>,
Jason Wang <jasowang@redhat.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
Stefano Garzarella <sgarzare@redhat.com>,
Germano Veit Michel <germano@redhat.com>,
Raphael Norwitz <raphael.norwitz@nutanix.com>
Subject: [PATCH v1 08/15] libvhost-user: Don't zero out memory for memory regions
Date: Fri, 2 Feb 2024 22:53:25 +0100 [thread overview]
Message-ID: <20240202215332.118728-9-david@redhat.com> (raw)
In-Reply-To: <20240202215332.118728-1-david@redhat.com>
dev->nregions always covers only valid entries. Stop zeroing out other
array elements that are unused.
Signed-off-by: David Hildenbrand <david@redhat.com>
---
subprojects/libvhost-user/libvhost-user.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/subprojects/libvhost-user/libvhost-user.c b/subprojects/libvhost-user/libvhost-user.c
index f99c888b48..e1a1b9df88 100644
--- a/subprojects/libvhost-user/libvhost-user.c
+++ b/subprojects/libvhost-user/libvhost-user.c
@@ -888,13 +888,9 @@ vu_rem_mem_reg(VuDev *dev, VhostUserMsg *vmsg) {
munmap((void *)(uintptr_t)r->mmap_addr, r->size + r->mmap_offset);
- /*
- * Shift all affected entries by 1 to close the hole at index i and
- * zero out the last entry.
- */
+ /* Shift all affected entries by 1 to close the hole at index. */
memmove(dev->regions + i, dev->regions + i + 1,
sizeof(VuDevRegion) * (dev->nregions - i - 1));
- memset(dev->regions + dev->nregions - 1, 0, sizeof(VuDevRegion));
DPRINT("Successfully removed a region\n");
dev->nregions--;
i--;
@@ -2119,7 +2115,6 @@ vu_init(VuDev *dev,
DPRINT("%s: failed to malloc mem regions\n", __func__);
return false;
}
- memset(dev->regions, 0, VHOST_USER_MAX_RAM_SLOTS * sizeof(dev->regions[0]));
dev->vq = malloc(max_queues * sizeof(dev->vq[0]));
if (!dev->vq) {
--
2.43.0
next prev parent reply other threads:[~2024-02-02 21:55 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-02 21:53 [PATCH v1 00/15] libvhost-user: support more memslots and cleanup memslot handling code David Hildenbrand
2024-02-02 21:53 ` [PATCH v1 01/15] libvhost-user: Fix msg_region->userspace_addr computation David Hildenbrand
2024-02-04 1:35 ` Raphael Norwitz
2024-02-04 14:36 ` David Hildenbrand
2024-02-04 22:01 ` Raphael Norwitz
2024-02-05 7:32 ` David Hildenbrand
2024-02-13 17:32 ` Michael S. Tsirkin
2024-02-13 18:25 ` David Hildenbrand
2024-02-02 21:53 ` [PATCH v1 02/15] libvhost-user: Dynamically allocate memory for memory slots David Hildenbrand
2024-02-04 1:36 ` Raphael Norwitz
2024-02-02 21:53 ` [PATCH v1 03/15] libvhost-user: Bump up VHOST_USER_MAX_RAM_SLOTS to 509 David Hildenbrand
2024-02-04 1:42 ` Raphael Norwitz
2024-02-02 21:53 ` [PATCH v1 04/15] libvhost-user: Factor out removing all mem regions David Hildenbrand
2024-02-04 1:43 ` Raphael Norwitz
2024-02-02 21:53 ` [PATCH v1 05/15] libvhost-user: Merge vu_set_mem_table_exec_postcopy() into vu_set_mem_table_exec() David Hildenbrand
2024-02-04 1:44 ` Raphael Norwitz
2024-02-02 21:53 ` [PATCH v1 06/15] libvhost-user: Factor out adding a memory region David Hildenbrand
2024-02-04 1:44 ` Raphael Norwitz
2024-02-02 21:53 ` [PATCH v1 07/15] libvhost-user: No need to check for NULL when unmapping David Hildenbrand
2024-02-04 1:45 ` Raphael Norwitz
2024-02-02 21:53 ` David Hildenbrand [this message]
2024-02-04 1:46 ` [PATCH v1 08/15] libvhost-user: Don't zero out memory for memory regions Raphael Norwitz
2024-02-02 21:53 ` [PATCH v1 09/15] libvhost-user: Don't search for duplicates when removing " David Hildenbrand
2024-02-04 1:47 ` Raphael Norwitz
2024-02-02 21:53 ` [PATCH v1 10/15] libvhost-user: Factor out search for memory region by GPA and simplify David Hildenbrand
2024-02-04 1:47 ` Raphael Norwitz
2024-02-02 21:53 ` [PATCH v1 11/15] libvhost-user: Speedup gpa_to_mem_region() and vu_gpa_to_va() David Hildenbrand
2024-02-04 2:10 ` Raphael Norwitz
2024-02-04 14:51 ` David Hildenbrand
2024-02-04 22:07 ` Raphael Norwitz
2024-02-05 7:32 ` David Hildenbrand
2024-02-02 21:53 ` [PATCH v1 12/15] libvhost-user: Use most of mmap_offset as fd_offset David Hildenbrand
2024-02-04 2:11 ` Raphael Norwitz
2024-02-02 21:53 ` [PATCH v1 13/15] libvhost-user: Factor out vq usability check David Hildenbrand
2024-02-04 2:11 ` Raphael Norwitz
2024-02-02 21:53 ` [PATCH v1 14/15] libvhost-user: Dynamically remap rings after (temporarily?) removing memory regions David Hildenbrand
2024-02-04 2:15 ` Raphael Norwitz
2024-02-04 14:58 ` David Hildenbrand
2024-02-02 21:53 ` [PATCH v1 15/15] libvhost-user: Mark mmap'ed region memory as MADV_DONTDUMP David Hildenbrand
2024-02-04 2:16 ` Raphael Norwitz
2024-02-07 11:40 ` [PATCH v1 00/15] libvhost-user: support more memslots and cleanup memslot handling code Stefano Garzarella
2024-02-09 22:36 ` David Hildenbrand
2024-02-13 17:33 ` Michael S. Tsirkin
2024-02-13 18:27 ` David Hildenbrand
2024-02-13 18:55 ` Michael S. Tsirkin
2024-02-14 11:06 ` David Hildenbrand
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