From: "Daniel P. Berrangé" <berrange@redhat.com>
To: Steve Sistare <steven.sistare@oracle.com>
Cc: "Jason Zeng" <jason.zeng@linux.intel.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
"Alex Bennée" <alex.bennee@linaro.org>,
"Juan Quintela" <quintela@redhat.com>,
qemu-devel@nongnu.org,
"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
"Alex Williamson" <alex.williamson@redhat.com>,
"Stefan Hajnoczi" <stefanha@redhat.com>,
"Marc-André Lureau" <marcandre.lureau@redhat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Philippe Mathieu-Daudé" <philmd@redhat.com>,
"Markus Armbruster" <armbru@redhat.com>
Subject: Re: [PATCH V2 05/22] vl: memfd-alloc option
Date: Tue, 5 Jan 2021 16:27:08 +0000 [thread overview]
Message-ID: <20210105162708.GH724458@redhat.com> (raw)
In-Reply-To: <1609861330-129855-6-git-send-email-steven.sistare@oracle.com>
On Tue, Jan 05, 2021 at 07:41:53AM -0800, Steve Sistare wrote:
> Allocate anonymous memory using memfd_create if the memfd-alloc option is
> set.
>
> Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
> ---
> exec.c | 38 ++++++++++++++++++++++++++++++--------
> include/sysemu/sysemu.h | 1 +
> qemu-options.hx | 11 +++++++++++
> softmmu/vl.c | 4 ++++
> trace-events | 1 +
> 5 files changed, 47 insertions(+), 8 deletions(-)
> diff --git a/qemu-options.hx b/qemu-options.hx
> index 708583b..455b43b7 100644
> --- a/qemu-options.hx
> +++ b/qemu-options.hx
> @@ -4094,6 +4094,17 @@ SRST
> an unmigratable state.
> ERST
>
> +#ifdef __linux__
> +DEF("memfd-alloc", 0, QEMU_OPTION_memfd_alloc, \
> + "-memfd-alloc allocate anonymous memory using memfd_create\n",
> + QEMU_ARCH_ALL)
> +#endif
> +
> +SRST
> +``-memfd-alloc``
> + Allocate anonymous memory using memfd_create (Linux only).
> +ERST
Do we really need a new arg for this ? It is already possible to request
use of memfd for the guest RAM using
-object memory-backend-memfd,id=ram-node0,size=NNNN
this memory backend object framework was intended to remove the need to
add new ad-hoc CLI args for controlling memory allocation.
Regards,
Daniel
--
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next prev parent reply other threads:[~2021-01-05 16:36 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-05 15:41 [PATCH V2 00/22] Live Update Steve Sistare
2021-01-05 15:41 ` [PATCH V2 01/22] as_flat_walk Steve Sistare
2021-01-05 15:41 ` [PATCH V2 02/22] qemu_ram_volatile Steve Sistare
2021-01-05 15:41 ` [PATCH V2 03/22] oslib: qemu_clr_cloexec Steve Sistare
2021-01-05 15:41 ` [PATCH V2 04/22] util: env var helpers Steve Sistare
2021-01-05 15:41 ` [PATCH V2 05/22] vl: memfd-alloc option Steve Sistare
2021-01-05 16:27 ` Daniel P. Berrangé [this message]
2021-01-06 16:36 ` Steven Sistare
2021-01-06 20:10 ` Paolo Bonzini
2021-01-06 21:19 ` Steven Sistare
2021-01-05 15:41 ` [PATCH V2 06/22] vl: add helper to request re-exec Steve Sistare
2021-01-05 15:41 ` [PATCH V2 07/22] cpr Steve Sistare
2021-01-05 15:41 ` [PATCH V2 08/22] cpr: QMP interfaces Steve Sistare
2021-01-05 15:41 ` [PATCH V2 09/22] cpr: HMP interfaces Steve Sistare
2021-01-05 15:41 ` [PATCH V2 10/22] pci: export functions for cpr Steve Sistare
2021-01-05 15:41 ` [PATCH V2 11/22] vfio-pci: refactor " Steve Sistare
2021-01-05 15:42 ` [PATCH V2 12/22] vfio-pci: cpr Steve Sistare
2021-01-05 15:42 ` [PATCH V2 13/22] vhost: reset vhost devices upon cprsave Steve Sistare
2021-01-05 15:42 ` [PATCH V2 14/22] chardev: cpr framework Steve Sistare
2021-01-05 15:42 ` [PATCH V2 15/22] chardev: cpr for simple devices Steve Sistare
2021-01-05 15:42 ` [PATCH V2 16/22] chardev: cpr for pty Steve Sistare
2021-01-05 15:42 ` [PATCH V2 17/22] chardev: socket accept subroutine Steve Sistare
2021-01-05 15:42 ` [PATCH V2 18/22] chardev: cpr for sockets Steve Sistare
2021-01-05 16:22 ` Daniel P. Berrangé
2021-01-05 16:35 ` Steven Sistare
2021-01-05 15:42 ` [PATCH V2 19/22] monitor: cpr support Steve Sistare
2021-01-05 15:42 ` [PATCH V2 20/22] cpr: only-cpr-capable option Steve Sistare
2021-01-05 15:42 ` [PATCH V2 21/22] cpr: maintainers Steve Sistare
2021-01-05 15:42 ` [PATCH V2 22/22] simplify savevm Steve Sistare
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