From: Catalin Marinas <catalin.marinas@arm.com>
To: Jianguo Wu <wujianguo@huawei.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
"rob@landley.net" <rob@landley.net>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
Li Zefan <lizefan@huawei.com>, Wang Nan <wangnan0@huawei.com>
Subject: Re: [PATCH] mm/kmemleak: add support for re-enable kmemleak at runtime
Date: Fri, 17 Jan 2014 12:04:36 +0000 [thread overview]
Message-ID: <20140117120436.GC28895@arm.com> (raw)
In-Reply-To: <52D8FA72.8080100@huawei.com>
On Fri, Jan 17, 2014 at 09:40:02AM +0000, Jianguo Wu wrote:
> Now disabling kmemleak is an irreversible operation, but sometimes
> we may need to re-enable kmemleak at runtime. So add a knob to enable
> kmemleak at runtime:
> echo on > /sys/kernel/debug/kmemleak
It is irreversible for very good reason: once it missed the initial
memory allocations, there is no way for kmemleak to build the object
reference graph and you'll get lots of false positives, pretty much
making it unusable.
--
Catalin
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next prev parent reply other threads:[~2014-01-17 12:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-17 9:40 Jianguo Wu
2014-01-17 12:04 ` Catalin Marinas [this message]
2014-01-18 8:41 ` Jianguo Wu
2014-01-18 10:45 ` Catalin Marinas
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