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Re: [PATCH v2 9/9] hostmem: Wire up RAM_NORESERVE via "reserve" property
From: |
Eduardo Habkost |
Subject: |
Re: [PATCH v2 9/9] hostmem: Wire up RAM_NORESERVE via "reserve" property |
Date: |
Fri, 5 Mar 2021 17:14:31 -0500 |
On Fri, Mar 05, 2021 at 11:16:34AM +0100, David Hildenbrand wrote:
> Let's provide a way to control the use of RAM_NORESERVE via memory
> backends using the "reserve" property which defaults to true (old
> behavior).
>
> Only POSIX supports setting the flag (and Linux support is checked at
> runtime, depending on the setting of "/proc/sys/vm/overcommit_memory").
> Windows will bail out.
>
> The target use case is virtio-mem, which dynamically exposes memory
> inside a large, sparse memory area to the VM. This essentially allows
> avoiding to set "/proc/sys/vm/overcommit_memory == 0") when using
> virtio-mem and also supporting hugetlbfs in the future.
>
> Reviewed-by: Peter Xu <peterx@redhat.com>
> Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Paolo, will the whole series get through your memory API queue?
Also, do you think we should move backends/hostmem* under the
"memory API" section in MAINTAINERS? Most memory backend changes
also involve changes in the memory API.
--
Eduardo
- [PATCH v2 8/9] util/mmap-alloc: Support RAM_NORESERVE via MAP_NORESERVE, (continued)
- [PATCH v2 8/9] util/mmap-alloc: Support RAM_NORESERVE via MAP_NORESERVE, David Hildenbrand, 2021/03/05
- Re: [PATCH v2 8/9] util/mmap-alloc: Support RAM_NORESERVE via MAP_NORESERVE, Peter Xu, 2021/03/05
- Re: [PATCH v2 8/9] util/mmap-alloc: Support RAM_NORESERVE via MAP_NORESERVE, David Hildenbrand, 2021/03/05
- Re: [PATCH v2 8/9] util/mmap-alloc: Support RAM_NORESERVE via MAP_NORESERVE, Peter Xu, 2021/03/05
- Re: [PATCH v2 8/9] util/mmap-alloc: Support RAM_NORESERVE via MAP_NORESERVE, David Hildenbrand, 2021/03/05
- Re: [PATCH v2 8/9] util/mmap-alloc: Support RAM_NORESERVE via MAP_NORESERVE, David Hildenbrand, 2021/03/07
- Re: [PATCH v2 8/9] util/mmap-alloc: Support RAM_NORESERVE via MAP_NORESERVE, Marcel Apfelbaum, 2021/03/07
- Re: [PATCH v2 8/9] util/mmap-alloc: Support RAM_NORESERVE via MAP_NORESERVE, David Hildenbrand, 2021/03/08
- Re: [PATCH v2 8/9] util/mmap-alloc: Support RAM_NORESERVE via MAP_NORESERVE, Marcel Apfelbaum, 2021/03/08
[PATCH v2 9/9] hostmem: Wire up RAM_NORESERVE via "reserve" property, David Hildenbrand, 2021/03/05
- Re: [PATCH v2 9/9] hostmem: Wire up RAM_NORESERVE via "reserve" property,
Eduardo Habkost <=