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Re: [PATCH v2 2.6.38-rc8-tip 3/20] 3: uprobes: Breakground page replacement.
- From: Steven Rostedt <rostedt at goodmis dot org>
- To: Srikar Dronamraju <srikar at linux dot vnet dot ibm dot com>
- Cc: Peter Zijlstra <peterz at infradead dot org>, Ingo Molnar <mingo at elte dot hu>, Linux-mm <linux-mm at kvack dot org>, Arnaldo Carvalho de Melo <acme at infradead dot org>, Linus Torvalds <torvalds at linux-foundation dot org>, Ananth N Mavinakayanahalli <ananth at in dot ibm dot com>, Christoph Hellwig <hch at infradead dot org>, Andi Kleen <andi at firstfloor dot org>, Masami Hiramatsu <masami dot hiramatsu dot pt at hitachi dot com>, Oleg Nesterov <oleg at redhat dot com>, LKML <linux-kernel at vger dot kernel dot org>, Jim Keniston <jkenisto at linux dot vnet dot ibm dot com>, Roland McGrath <roland at hack dot frob dot com>, SystemTap <systemtap at sources dot redhat dot com>, Andrew Morton <akpm at linux-foundation dot org>, "Paul E. McKenney" <paulmck at linux dot vnet dot ibm dot com>
- Date: Mon, 14 Mar 2011 14:21:35 -0400
- Subject: Re: [PATCH v2 2.6.38-rc8-tip 3/20] 3: uprobes: Breakground page replacement.
- References: <20110314133403.27435.7901.sendpatchset@localhost6.localdomain6> <20110314133433.27435.49566.sendpatchset@localhost6.localdomain6> <1300117137.9910.110.camel@gandalf.stny.rr.com> <20110314172439.GO24254@linux.vnet.ibm.com>
On Mon, 2011-03-14 at 22:54 +0530, Srikar Dronamraju wrote:
> >
> > I'm also curious to why we can't modify text code that is also mapped as
> > read/write.
> >
>
> If text code is mapped read/write then on memory pressure the page gets
> written to the disk. Hence breakpoints inserted may end up being in the
> disk copy modifying the actual copy.
>
>
OK, could you put a comment about that too.
Thanks,
-- Steve