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From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
To: ali saeedi <ali.saeedi56@gmail.com>
Cc: qemu-devel@nongnu.org, stefanha@redhat.com
Subject: Re: [Qemu-devel] DIRTY_MEMORY_BLOCK_SIZE;
Date: Fri, 30 Jun 2017 12:26:10 +0100	[thread overview]
Message-ID: <20170630112610.GA2437@work-vm> (raw)
In-Reply-To: <CAGKXQyfO-yu3qZf7RHiUPXQZDSZwn6N_48Ji8adPHozkpK9JBQ@mail.gmail.com>

* ali saeedi (ali.saeedi56@gmail.com) wrote:
> Hello
> what does 'DIRTY_MEMORY_BLOCK_SIZE' mean?
> is it the number of words in a block? or number of pages in a block? or
> number of bytes in a block?
> thanks a lot

(cc'ing Stefan)
I think that DIRTY_MEMORY_BLOCK_SIZE is the number of TARGET_PAGEs
within one DIRTY_MEMORY_BLOCK
So with the common 4k target page that's 4k*256k*8=8GB/dirty memory
block - note these are just the size of structure sin qemu, it's still
got the ranularity ot mark individual target pages as dirty.

Dave

--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK

  reply	other threads:[~2017-06-30 11:26 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-30 10:47 [Qemu-devel] DIRTY_MEMORY_BLOCK_SIZE; ali saeedi
2017-06-30 11:26 ` Dr. David Alan Gilbert [this message]
2017-07-05 15:10   ` Stefan Hajnoczi
2017-07-05 16:06     ` Dr. David Alan Gilbert
2017-07-06  9:44       ` Stefan Hajnoczi

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