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Re: [Qemu-devel] [PATCH 02/38] qemu-doc: Fix ivshmem huge page example
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH 02/38] qemu-doc: Fix ivshmem huge page example |
Date: |
Tue, 1 Mar 2016 12:35:38 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.0 |
On 29/02/2016 19:40, Markus Armbruster wrote:
> Option parameter "share" is missing. Without it, you get a *private*
> mmap(), which defeats ivshmem's purpose pretty thoroughly ;)
>
> While there, switch to the conventional mountpoint of hugetlbfs
> /dev/hugepages.
>
> Signed-off-by: Markus Armbruster <address@hidden>
> ---
> qemu-doc.texi | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/qemu-doc.texi b/qemu-doc.texi
> index bc9dd13..65f3b29 100644
> --- a/qemu-doc.texi
> +++ b/qemu-doc.texi
> @@ -1311,7 +1311,7 @@ Instead of specifying the <shm size> using POSIX shm,
> you may specify
> a memory backend that has hugepage support:
>
> @example
> -qemu-system-i386 -object
> memory-backend-file,size=1G,mem-path=/mnt/hugepages/my-shmem-file,id=mb1
> +qemu-system-i386 -object
> memory-backend-file,size=1G,mem-path=/dev/hugepages/my-shmem-file,share,id=mb1
> -device ivshmem,x-memdev=mb1
> @end example
>
>
Reviewed-by: Paolo Bonzini <address@hidden>