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Re: [PATCH 4/5] pci-arbiter,rumpdisk: Lock all memory for swapping
From: |
Samuel Thibault |
Subject: |
Re: [PATCH 4/5] pci-arbiter,rumpdisk: Lock all memory for swapping |
Date: |
Mon, 27 Dec 2021 15:49:51 +0100 |
User-agent: |
NeoMutt/20170609 (1.8.3) |
Damien Zammit, le dim. 26 déc. 2021 22:38:56 +1100, a ecrit:
> This locks all memory in bootstrap processes so that
> disk driver dependencies don't get swapped out.
Applied, thanks!
> ---
> pci-arbiter/main.c | 9 +++++++++
> rumpdisk/main.c | 8 ++++++++
> 2 files changed, 17 insertions(+)
>
> diff --git a/pci-arbiter/main.c b/pci-arbiter/main.c
> index 510e7dbc..602a545c 100644
> --- a/pci-arbiter/main.c
> +++ b/pci-arbiter/main.c
> @@ -203,8 +203,17 @@ main (int argc, char **argv)
>
> if (next_task != MACH_PORT_NULL)
> {
> + /* We are a bootstrap process */
> +
> machdev_register (&pci_arbiter_emulation_ops);
> machdev_trivfs_init (argc, argv, next_task, "pci", NULL /*
> _SERVERS_BUS "pci" */, &bootstrap);
> +
> + /* Make sure we will not swap out, in case we are needed for swapping
> + back in. */
> + err = mlockall(MCL_CURRENT | MCL_FUTURE);
> + if (err)
> + error (1, errno, "cannot lock all memory");
> +
> machdev_device_init ();
> err = pthread_create (&t, NULL, machdev_server, NULL);
> if (err)
> diff --git a/rumpdisk/main.c b/rumpdisk/main.c
> index bafe0250..a1873c31 100644
> --- a/rumpdisk/main.c
> +++ b/rumpdisk/main.c
> @@ -25,6 +25,7 @@
> #include <error.h>
> #include <argp.h>
> #include <version.h>
> +#include <sys/mman.h>
>
> #include "libmachdev/machdev.h"
> #include "block-rump.h"
> @@ -113,6 +114,13 @@ main (int argc, char **argv)
>
> rump_register_block ();
> machdev_trivfs_init (argc, argv, bootstrap_resume_task, "rumpdisk",
> "/dev/rumpdisk", &bootstrap);
> +
> + /* Make sure we will not swap out, in case we drive the disk used for
> + swapping. */
> + err = mlockall(MCL_CURRENT | MCL_FUTURE);
> + if (err)
> + error (1, errno, "cannot lock all memory");
> +
> machdev_device_init ();
> err = pthread_create (&t, NULL, machdev_server, NULL);
> if (err)
> --
> 2.33.1
>
>
--
Samuel
«Tiens, quand j'aurai un peu de temps et une partition libre, je crois
que je vais essayer de remplacer mes scripts de démarrage par des
programmes Windows lancés via Wine et binfmt_misc :-)»
-+- AGV in Guide du linuxien pervers - "J'sais pas quoi faire... (air connu)"
- [PATCH 0/5] hurd: Patches for new librump, Damien Zammit, 2021/12/26
- [PATCH 1/5] rumpdisk: define _STANDALONE to avoid register_t, Damien Zammit, 2021/12/26
- [PATCH 2/5] rumpdisk: Link with rumpvfs_nofifofs if present, Damien Zammit, 2021/12/26
- [PATCH 4/5] pci-arbiter,rumpdisk: Lock all memory for swapping, Damien Zammit, 2021/12/26
- Re: [PATCH 4/5] pci-arbiter,rumpdisk: Lock all memory for swapping,
Samuel Thibault <=
- [PATCH 5/5] rumpdisk: Fault-in the memory pages, Damien Zammit, 2021/12/26
- [PATCH 3/5] rumpdisk: Use raw uncached character device rwdXd, Damien Zammit, 2021/12/26