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Re: [PATCH v1 08/13] util/mmap-alloc: Prepare for resizable mmaps
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From: |
Richard Henderson |
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Subject: |
Re: [PATCH v1 08/13] util/mmap-alloc: Prepare for resizable mmaps |
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Date: |
Thu, 6 Feb 2020 12:02:34 +0000 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 |
On 2/3/20 6:31 PM, David Hildenbrand wrote:
> When shrinking a mmap we want to re-reserve the already populated area.
> When growing a memory region, we want to populate starting with a given
> fd_offset. Prepare by allowing to pass these parameters.
>
> Also, let's make sure we always process full pages, to avoid
> unmapping/remapping pages that are already in use when
> growing/shrinking. (existing callers seem to guarantee this, but that's
> not obvious)
>
> Cc: "Michael S. Tsirkin" <address@hidden>
> Cc: Greg Kurz <address@hidden>
> Cc: Murilo Opsfelder Araujo <address@hidden>
> Cc: Eduardo Habkost <address@hidden>
> Cc: "Dr. David Alan Gilbert" <address@hidden>
> Signed-off-by: David Hildenbrand <address@hidden>
> ---
> util/mmap-alloc.c | 32 +++++++++++++++++++++-----------
> 1 file changed, 21 insertions(+), 11 deletions(-)
Reviewed-by: Richard Henderson <address@hidden>
r~
- Re: [PATCH v1 09/13] util/mmap-alloc: Implement resizable mmaps, (continued)
Re: [PATCH v1 09/13] util/mmap-alloc: Implement resizable mmaps, Murilo Opsfelder Araújo, 2020/02/06
[PATCH v1 08/13] util/mmap-alloc: Prepare for resizable mmaps, David Hildenbrand, 2020/02/03
Re: [PATCH v1 08/13] util/mmap-alloc: Prepare for resizable mmaps, David Hildenbrand, 2020/02/06
Re: [PATCH v1 08/13] util/mmap-alloc: Prepare for resizable mmaps,
Richard Henderson <=
[PATCH v1 11/13] util: vfio-helpers: Implement ram_block_resized(), David Hildenbrand, 2020/02/03
[PATCH v1 12/13] util: oslib: Resizable anonymous allocations under POSIX, David Hildenbrand, 2020/02/03
[PATCH v1 06/13] util/mmap-alloc: Factor out reserving of a memory region to mmap_reserve(), David Hildenbrand, 2020/02/03
[PATCH v1 13/13] exec: Ram blocks with resizable anonymous allocations under POSIX, David Hildenbrand, 2020/02/03
Re: [PATCH v1 00/13] Ram blocks with resizable anonymous allocations under POSIX, Michael S. Tsirkin, 2020/02/06