From: Marco <firefox82@alice.it>
To: linux-mm@kvack.org
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: Return value of __mm_populate
Date: Sat, 13 Apr 2013 14:41:23 +0200 [thread overview]
Message-ID: <51695273.6080800@alice.it> (raw)
In-Reply-To: <51694C2A.4050906@gmail.com>
Adding in cc: lkml
Il 13/04/2013 14:14, Marco Stornelli ha scritto:
> Hi,
>
> I was seeing the code of __mm_populate (in -next) and I've got a doubt
> about the return value. The function __mlock_posix_error_return should
> return a proper error for mlock, converting the return value from
> __get_user_pages. It checks for EFAULT and ENOMEM. Actually
> __get_user_pages could return, in addition, ERESTARTSYS and EHWPOISON.
> So it seems to me that we could return to user space not expected value.
> I can't see them on the man page. In addition we shouldn't ever return
> ERESTARTSYS to the user space but EINTR. According to the man pages
> maybe we should return EAGAIN in these cases. Am I missing something?
>
> Thanks,
>
> Marco
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next prev parent reply other threads:[~2013-04-13 12:48 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-13 12:14 Return value of __mm_populate Marco Stornelli
2013-04-13 12:41 ` Marco [this message]
2013-04-14 0:18 ` KOSAKI Motohiro
2013-04-14 7:25 ` Marco Stornelli
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