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bh=AuV5R0E+OVQn3ccG1zNVrvmx2Wn05QD+ELhGgiMtf8o=; b=F5kMM+V2uKUSJgDwxvWPjb9QyA5KkLadAt4SpkvIF6VXmCub66S7A7a21jvuOF6Ec2a7ld HI0T6B45M+QMZbF8dx7iRwahjH6joR0OUM28plnrDJKRnXaij6+C3V1FaH/fjoeBauQJco ZsRQgja+2UlV4CEdIdVVOwv9z+Cs7/s= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1738166488; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=AuV5R0E+OVQn3ccG1zNVrvmx2Wn05QD+ELhGgiMtf8o=; b=seCZUlJ+HRH7dcKRpTt/+HWSqWgHh0QEFVCEj0jgJVQOWzp68L3AIV1fDZp7yQWTJ2a8af ONECSaPB6IvrAgAA== From: Fabiano Rosas To: qemu-devel@nongnu.org Cc: Peter Xu , Steve Sistare Subject: [PULL 10/42] hostmem-memfd: preserve for cpr Date: Wed, 29 Jan 2025 13:00:27 -0300 Message-Id: <20250129160059.6987-11-farosas@suse.de> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20250129160059.6987-1-farosas@suse.de> References: <20250129160059.6987-1-farosas@suse.de> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Spamd-Result: default: False [-2.80 / 50.00]; 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charset="utf-8" From: Steve Sistare Preserve memory-backend-memfd memory objects during cpr-transfer. Signed-off-by: Steve Sistare Reviewed-by: Peter Xu Link: https://lore.kernel.org/r/1736967650-129648-10-git-send-email-steven.= sistare@oracle.com Signed-off-by: Fabiano Rosas --- backends/hostmem-memfd.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/backends/hostmem-memfd.c b/backends/hostmem-memfd.c index 1672da9e30..85daa1432c 100644 --- a/backends/hostmem-memfd.c +++ b/backends/hostmem-memfd.c @@ -17,6 +17,7 @@ #include "qemu/module.h" #include "qapi/error.h" #include "qom/object.h" +#include "migration/cpr.h" =20 OBJECT_DECLARE_SIMPLE_TYPE(HostMemoryBackendMemfd, MEMORY_BACKEND_MEMFD) =20 @@ -33,15 +34,19 @@ static bool memfd_backend_memory_alloc(HostMemoryBackend *backend, Error **errp) { HostMemoryBackendMemfd *m =3D MEMORY_BACKEND_MEMFD(backend); - g_autofree char *name =3D NULL; + g_autofree char *name =3D host_memory_backend_get_name(backend); + int fd =3D cpr_find_fd(name, 0); uint32_t ram_flags; - int fd; =20 if (!backend->size) { error_setg(errp, "can't create backend with size 0"); return false; } =20 + if (fd >=3D 0) { + goto have_fd; + } + fd =3D qemu_memfd_create(TYPE_MEMORY_BACKEND_MEMFD, backend->size, m->hugetlb, m->hugetlbsize, m->seal ? F_SEAL_GROW | F_SEAL_SHRINK | F_SEAL_SEAL : 0, @@ -49,9 +54,10 @@ memfd_backend_memory_alloc(HostMemoryBackend *backend, E= rror **errp) if (fd =3D=3D -1) { return false; } + cpr_save_fd(name, 0, fd); =20 +have_fd: backend->aligned =3D true; - name =3D host_memory_backend_get_name(backend); ram_flags =3D backend->share ? RAM_SHARED : RAM_PRIVATE; ram_flags |=3D backend->reserve ? 0 : RAM_NORESERVE; ram_flags |=3D backend->guest_memfd ? RAM_GUEST_MEMFD : 0; --=20 2.35.3