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From: Cyril Hrubis <chrubis@suse.cz>
To: ltp@lists.linux.it
Subject: [LTP] [RFC] [PATCH] syscalls/move_pages12: Two fixes.
Date: Fri, 5 May 2017 14:55:39 +0200	[thread overview]
Message-ID: <20170505125539.GC16729@rei.suse.de> (raw)
In-Reply-To: <959115821.7379621.1493924279254.JavaMail.zimbra@redhat.com>

Hi!
> > * Do not multiply free ram with 1024
> > 
> >   - Since we get overflow even on fairly modest
> >     machine with a few GB of RAM and the test
> >     will always report "Not enough RAM".
> 
> This is obviously ok.

I've pushed this part.

> > 
> > * Drop caches before the test
> > 
> >   - Otherwise the move_pages() syscalls may
> >     fail with ENOMEM.
> > 
> 
> How about we try to allocate/touch couple MB worth of pages
> on node, we are going to move to (alloc_pages_on_node())?
> If we can't allocate, exit with TCONF.
> 
> Otherwise we free those pages just before move_pages().
> Wouldn't that give us better guarantee, there are some
> free pages on target node?

Sounds reasonable, I will look into this.

-- 
Cyril Hrubis
chrubis@suse.cz

      reply	other threads:[~2017-05-05 12:55 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-05-03 12:42 [LTP] [RFC] [PATCH] syscalls/move_pages12: Two fixes Cyril Hrubis
2017-05-04 18:57 ` Jan Stancek
2017-05-05 12:55   ` Cyril Hrubis [this message]

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