[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Qemu-devel] [PATCH v3] rcu: reduce more than 7MB heap memory by mal

From: Stefan Hajnoczi
Subject: Re: [Qemu-devel] [PATCH v3] rcu: reduce more than 7MB heap memory by malloc_trim()
Date: Fri, 24 Nov 2017 11:27:01 +0000
User-agent: Mutt/1.9.1 (2017-09-22)

On Fri, Nov 24, 2017 at 02:30:30PM +0800, Yang Zhong wrote:
> diff --git a/configure b/configure
> index 0c6e757..6292ab0 100755
> --- a/configure
> +++ b/configure
> @@ -426,6 +426,7 @@ vxhs=""
>  supported_cpu="no"
>  supported_os="no"
>  bogus_os="no"
> +malloc_trim="yes"

Looks pretty good, sorry I forgot to mention two things:

Please add the --enable-malloc-trim/--disable-malloc-trim options so
it's easy to build QEMU with or without this feature.  For example, if
someone is debugging a performance issue they may wish to rebuild with
--disable-malloc-trim to confirm that trimming hasn't caused a

Also please change this line to malloc_trim="" so the "Disabling
malloc_trim with non-libc memory allocator" error message is only
printed when --enable-malloc-trim was explicitly given by the user.
Otherwise the message is always printed when QEMU is built with
jemalloc/tcmalloc - that's too noisy.

Attachment: signature.asc
Description: PGP signature

reply via email to

[Prev in Thread] Current Thread [Next in Thread]