From: Thomas Huth <thuth@redhat.com>
To: Richard Henderson <richard.henderson@linaro.org>, qemu-devel@nongnu.org
Cc: "Philippe Mathieu-Daudé" <philmd@linaro.org>,
"Hyman Huang" <huangy81@chinatelecom.cn>,
"Peter Xu" <peterx@redhat.com>,
"Markus Armbruster" <armbru@redhat.com>
Subject: Re: [PATCH] softmmu: Move dirtylimit.c into the target independent source set
Date: Wed, 26 Apr 2023 17:05:14 +0200 [thread overview]
Message-ID: <0b417bc6-8f49-54c6-1d23-9884ce45b792@redhat.com> (raw)
In-Reply-To: <8177194c-853e-de0b-fe06-0ae82bbc127f@linaro.org>
On 13/04/2023 12.31, Richard Henderson wrote:
> On 4/13/23 07:45, Thomas Huth wrote:
>> uint32_t dirty_ring_size = kvm_dirty_ring_size();
>> uint64_t dirty_ring_size_meory_MB =
>> - dirty_ring_size * TARGET_PAGE_SIZE >> 20;
>> + dirty_ring_size * qemu_target_page_size() >> 20;
>
> Existing problem, the types here are suspicious: dirty_ring_size is
> uint32_t, dirty_ring_size_meory (typo) is uint64_t.
>
> I wonder if this is better computed as
>
> uint32_t dirty_ring_size_MB = dirty_ring_size >> (20 -
> qemu_target_page_bits());
qemu_target_page_size() returns a "size_t", so I think it should be fine for
64-bit hosts. But for 32-bit hosts, this looks error prone, indeed, so I
think your suggestion is a good idea. Care to send a patch?
Thomas
next prev parent reply other threads:[~2023-04-26 15:06 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-13 5:45 [PATCH] softmmu: Move dirtylimit.c into the target independent source set Thomas Huth
2023-04-13 10:31 ` Richard Henderson
2023-04-26 15:05 ` Thomas Huth [this message]
2023-04-13 13:02 ` Fabiano Rosas
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