From: Cyril Hrubis <chrubis@suse.cz>
To: ltp@lists.linux.it
Subject: [LTP] [PATCH 4/4] mmapstress03: Fix 32bit test on 64bit kernel
Date: Thu, 12 Jan 2017 18:00:22 +0100 [thread overview]
Message-ID: <20170112170021.GA29187@rei.lan> (raw)
In-Reply-To: <374582327.1951599.1484239285415.JavaMail.zimbra@redhat.com>
Hi!
> > Something as (((uintptr_t)1) << ((sizeof(void*)<<3) - 1) - pagesize)
>
> Wouldn't this crash same as original?
That does not seem to be the case here I guess that the reason is that
the size passed to the mmap2() in case of the 32bit binary on 64bit
kernel is so close to 4GB after the patch that it's rejected right away
as well. And possibly for 32bit binary on 32bit kernel 2GB size is
enough to be rejected for the very same reason.
--
Cyril Hrubis
chrubis@suse.cz
next prev parent reply other threads:[~2017-01-12 17:00 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-12 13:23 [LTP] [PATCH 1/4] lib: Add tst_kernel_bits() Cyril Hrubis
2017-01-12 13:23 ` [LTP] [PATCH 2/4] vma03: Disable the test on 64bit kernel as well Cyril Hrubis
2017-01-12 13:23 ` [LTP] [PATCH 3/4] mmapstress03: Small cleanup Cyril Hrubis
2017-01-12 13:23 ` [LTP] [PATCH 4/4] mmapstress03: Fix 32bit test on 64bit kernel Cyril Hrubis
2017-01-12 14:41 ` Jan Stancek
2017-01-12 15:05 ` Cyril Hrubis
2017-01-12 16:41 ` Jan Stancek
2017-01-12 17:00 ` Cyril Hrubis [this message]
2017-01-12 17:00 ` Jan Stancek
2017-01-12 14:40 ` [LTP] [PATCH 1/4] lib: Add tst_kernel_bits() Jan Stancek
2017-01-12 14:45 ` Cyril Hrubis
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