From: David Rientjes <rientjes@google.com>
To: Ben Hutchings <ben@decadent.org.uk>
Cc: Shuah Khan <shuahkh@osg.samsung.com>,
linux-api@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH selftests 5/6] selftests: vm: Try harder to allocate huge pages
Date: Tue, 10 Nov 2015 17:11:15 -0800 (PST) [thread overview]
Message-ID: <alpine.DEB.2.10.1511101710470.19847@chino.kir.corp.google.com> (raw)
In-Reply-To: <1447192104.6006.148.camel@decadent.org.uk>
[-- Attachment #1: Type: TEXT/PLAIN, Size: 768 bytes --]
On Tue, 10 Nov 2015, Ben Hutchings wrote:
> > I know this patch is in -mm and hasn't been merged by Linus yet, but I'm
> > wondering why the multiple /proc/sys/vm/drop_caches is helping?A Would it
> > simply suffice to put a sleep in there instead or is drop_caches actually
> > doing something useful a second time around?
>
> Initially I just retried setting nr_hugepages up to 10 times, which
> wasn't sufficient. A Then I added the drop_caches, and after that
> setting nr_hugepages tended to worked first time so I reduced the retry
> count. A It might not be necessary to retry at all.
>
Ok, thanks. I was just trying to make sure that the additional
drop_caches wasn't actually required for the test, in which case we would
have to fix drop_caches :)
prev parent reply other threads:[~2015-11-11 1:11 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1446334510.2595.13.camel@decadent.org.uk>
2015-10-31 23:39 ` Ben Hutchings
2015-11-10 20:01 ` David Rientjes
2015-11-10 20:05 ` Shuah Khan
2015-11-10 21:48 ` Ben Hutchings
2015-11-11 1:11 ` David Rientjes [this message]
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