From: David Hildenbrand <david@redhat.com>
To: Peter Xu <peterx@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>,
"Michael S . Tsirkin" <mst@redhat.com>,
Igor Kotrasinski <i.kotrasinsk@partner.samsung.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
qemu-devel@nongnu.org,
"Dr . David Alan Gilbert" <dgilbert@redhat.com>,
Alex Williamson <alex.williamson@redhat.com>,
Murilo Opsfelder Araujo <muriloo@linux.ibm.com>,
Igor Mammedov <imammedo@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Richard Henderson <rth@twiddle.net>
Subject: Re: [PATCH v3 12/15] util: vfio-helpers: Implement ram_block_resized()
Date: Mon, 2 Mar 2020 16:01:33 +0100 [thread overview]
Message-ID: <b67aa65d-4cda-8481-426f-3ffd758b7c24@redhat.com> (raw)
In-Reply-To: <20200228210152.GD180973@xz-x1>
On 28.02.20 22:01, Peter Xu wrote:
> On Fri, Feb 28, 2020 at 09:16:28PM +0100, David Hildenbrand wrote:
>>
>
> [...]
>
>>>> @@ -631,7 +658,7 @@ int qemu_vfio_dma_map(QEMUVFIOState *s, void *host, size_t size,
>>>> qemu_vfio_remove_mapping(s, mapping);
>>>> goto out;
>>>> }
>>>> - s->low_water_mark += size;
>>>> + s->low_water_mark += max_size;
>>>
>>> I think it's fine to only increase the low water mark here, however
>>> imo it would be better to also cache the max size in IOVAMapping too,
>>> then in resize() we double check new_size <= max_size? It also makes
>>> IOVAMapping more self contained.
>>>
>>
>> I‘ll have a look how much additional code that will imply - if it‘s simple, I‘ll do it.
>
> AFAICT it'll be as simple as introducing IOVAMapping.max_size, then
> pass max_size into qemu_vfio_add_mapping(). Thanks,
>
Yeah, was answering from my mobile without code at hand :) added! Thanks!
--
Thanks,
David / dhildenb
next prev parent reply other threads:[~2020-03-02 15:03 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-27 10:11 [PATCH v3 00/15] Ram blocks with resizeable anonymous allocations under POSIX David Hildenbrand
2020-02-27 10:11 ` [PATCH v3 01/15] util: vfio-helpers: Fix qemu_vfio_close() David Hildenbrand
2020-02-27 10:11 ` [PATCH v3 02/15] util: vfio-helpers: Remove Error parameter from qemu_vfio_undo_mapping() David Hildenbrand
2020-02-27 10:11 ` [PATCH v3 03/15] util: vfio-helpers: Factor out removal " David Hildenbrand
2020-02-27 10:11 ` [PATCH v3 04/15] exec: Factor out setting ram settings (madvise ...) into qemu_ram_apply_settings() David Hildenbrand
2020-02-27 10:11 ` [PATCH v3 05/15] exec: Reuse qemu_ram_apply_settings() in qemu_ram_remap() David Hildenbrand
2020-02-27 10:11 ` [PATCH v3 06/15] exec: Drop "shared" parameter from ram_block_add() David Hildenbrand
2020-02-27 10:11 ` [PATCH v3 07/15] util/mmap-alloc: Factor out calculation of the pagesize for the guard page David Hildenbrand
2020-02-28 19:43 ` Peter Xu
2020-02-27 10:11 ` [PATCH v3 08/15] util/mmap-alloc: Factor out reserving of a memory region to mmap_reserve() David Hildenbrand
2020-02-27 10:11 ` [PATCH v3 09/15] util/mmap-alloc: Factor out populating of memory to mmap_populate() David Hildenbrand
2020-03-03 8:43 ` David Hildenbrand
2020-02-27 10:12 ` [PATCH v3 10/15] util/mmap-alloc: Prepare for resizeable mmaps David Hildenbrand
2020-02-27 10:12 ` [PATCH v3 11/15] util/mmap-alloc: Implement " David Hildenbrand
2020-02-28 19:43 ` Peter Xu
2020-02-27 10:12 ` [PATCH v3 12/15] util: vfio-helpers: Implement ram_block_resized() David Hildenbrand
2020-02-28 19:42 ` Peter Xu
2020-02-28 20:16 ` David Hildenbrand
2020-02-28 21:01 ` Peter Xu
2020-03-02 15:01 ` David Hildenbrand [this message]
2020-02-28 19:55 ` Peter Xu
2020-02-28 20:19 ` David Hildenbrand
2020-02-28 20:49 ` Peter Xu
2020-02-28 20:56 ` David Hildenbrand
2020-02-27 10:12 ` [PATCH v3 13/15] util: oslib: Resizeable anonymous allocations under POSIX David Hildenbrand
2020-02-28 20:11 ` Peter Xu
2020-02-27 10:12 ` [PATCH v3 14/15] numa: Introduce ram_block_notifiers_support_resize() David Hildenbrand
2020-02-28 20:11 ` Peter Xu
2020-02-27 10:12 ` [PATCH v3 15/15] exec: Ram blocks with resizeable anonymous allocations under POSIX David Hildenbrand
2020-02-28 20:21 ` Peter Xu
2020-03-02 15:27 ` David Hildenbrand
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