From: Andi Kleen <andi@firstfloor.org>
To: Vasileios Karakasis <bkk@cslab.ece.ntua.gr>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-numa@vger.kernel.org
Subject: Re: [BUG] Invalid return address of mmap() followed by mbind() in multithreaded context
Date: Sat, 18 Jun 2011 20:12:32 +0200 [thread overview]
Message-ID: <20110618181232.GI16236@one.firstfloor.org> (raw)
In-Reply-To: <4DFB710D.7000902@cslab.ece.ntua.gr>
> for (i = 0; i < NR_ITER; i++) {
> addr = mmap(0, PAGE_SIZE, PROT_READ | PROT_WRITE,
> MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
> if (addr == (void *) -1) {
> assert(0 && "mmap failed");
> }
> *addr = 0;
>
> err = mbind(addr, PAGE_SIZE, MPOL_BIND, &node, sizeof(node), 0);
mbind() can be only done before the first touch. you're not actually testing
numa policy.
-andi
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WARNING: multiple messages have this Message-ID (diff)
From: Andi Kleen <andi@firstfloor.org>
To: Vasileios Karakasis <bkk@cslab.ece.ntua.gr>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-numa@vger.kernel.org
Subject: Re: [BUG] Invalid return address of mmap() followed by mbind() in multithreaded context
Date: Sat, 18 Jun 2011 20:12:32 +0200 [thread overview]
Message-ID: <20110618181232.GI16236@one.firstfloor.org> (raw)
In-Reply-To: <4DFB710D.7000902@cslab.ece.ntua.gr>
> for (i = 0; i < NR_ITER; i++) {
> addr = mmap(0, PAGE_SIZE, PROT_READ | PROT_WRITE,
> MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
> if (addr == (void *) -1) {
> assert(0 && "mmap failed");
> }
> *addr = 0;
>
> err = mbind(addr, PAGE_SIZE, MPOL_BIND, &node, sizeof(node), 0);
mbind() can be only done before the first touch. you're not actually testing
numa policy.
-andi
next prev parent reply other threads:[~2011-06-18 18:12 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-17 15:21 [BUG] Invalid return address of mmap() followed by mbind() in multithreaded context Vasileios Karakasis
2011-06-18 18:12 ` Andi Kleen [this message]
2011-06-18 18:12 ` Andi Kleen
2011-06-18 18:41 ` Vasileios Karakasis
2011-06-19 23:42 ` Vasileios Karakasis
2011-06-27 17:18 ` Kornilios Kourtis
2011-06-27 17:18 ` Kornilios Kourtis
2011-06-28 2:06 ` KOSAKI Motohiro
2011-06-28 2:06 ` KOSAKI Motohiro
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