qemu-devel.nongnu.org archive mirror
 help / color / mirror / Atom feed
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



  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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20240202215332.118728-9-david@redhat.com \
    --to=david@redhat.com \
    --cc=germano@redhat.com \
    --cc=jasowang@redhat.com \
    --cc=mst@redhat.com \
    --cc=qemu-devel@nongnu.org \
    --cc=raphael.norwitz@nutanix.com \
    --cc=sgarzare@redhat.com \
    --cc=stefanha@redhat.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).