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Message-Id: <20090129001849.9f8fdcb3.akpm@linux-foundation.org> Date: Thu, 29 Jan 2009 00:18:49 -0800 From: Andrew Morton <akpm@...ux-foundation.org> To: Daisuke Nishimura <nishimura@....nes.nec.co.jp> Cc: Christoph Lameter <cl@...ux-foundation.org>, Johannes Weiner <hannes@...xchg.org>, LKML <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org> Subject: Re: [PATCH] migration: migrate_vmas should check "vma" On Thu, 29 Jan 2009 10:16:23 +0900 Daisuke Nishimura <nishimura@....nes.nec.co.jp> wrote: > On Wed, 28 Jan 2009 17:55:12 +0100, Johannes Weiner <hannes@...xchg.org> wrote: > > On Wed, Jan 28, 2009 at 11:42:36AM -0500, Christoph Lameter wrote: > > > On Wed, 28 Jan 2009, Daisuke Nishimura wrote: > > > > > > > migrate_vmas() should check "vma" not "vma->vm_next" for for-loop condition. > > > > > > The loop condition is checked before vma = vma->vm_next. So the last > > > iteration of the loop will now be run with vma = NULL? > > > > No, the condition is always checked before the body is executed. The > > assignment to vma->vm_next happens at the end of every body. > > > So, I think in current code the loop body is not executed > about the last vma in the list. > Yep. Is this serious enough to bother fixing in 2.6.29? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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