Re: [PATCH v2 0/3] kmemleak: Fix false positive with special scan

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



From: Hiroshi DOYU <Hiroshi.DOYU@xxxxxxxxx>
Subject: Re: [PATCH v2 0/3] kmemleak: Fix false positive with special scan
Date: Wed, 02 Jun 2010 14:34:58 +0300 (EEST)

> From: ext Catalin Marinas <catalin.marinas@xxxxxxx>
> Subject: Re: [PATCH v2 0/3] kmemleak: Fix false positive with special scan
> Date: Wed, 2 Jun 2010 12:01:24 +0200
> 
>> Hi,
>> 
>> Sorry for the delay, I eventually got the time to look at your patches.
> 
> Thank you for your review.
> 
>> On Tue, 2010-06-01 at 11:25 +0100, Hiroshi DOYU wrote:
>>> There is a false positive case that a pointer is calculated by other
>>> methods than the usual container_of macro. "kmemleak_ignore" can cover
>>> such a false positive, but it would loose the advantage of memory leak
>>> detection. This patch allows kmemleak to work with such false
>>> positives by introducing a new special memory block with a specified
>>> calculation formula. A client module can register its area with a
>>> conversion function, with which function kmemleak scan could calculate
>>> a correct pointer.
>> 
>> While something needs to be done to cover these situations, I'm not so
>> convinced about the method as it complicates the code requiring such
>> conversion by having to insert two kmemleak hooks and a callback
>> function.
>>
>> Can we not add a new prio tree (or just use the existing one) for
>> pointer aliases? The advantage is that you only have a single function
>> to call, something like kmemleak_add_alias() and you do it at the point
>> the value was converted.

Ok, I understand now. Please ignore my previous. I'll try the above.
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Linux Arm (vger)]     [ARM Kernel]     [ARM MSM]     [Linux Tegra]     [Linux WPAN Networking]     [Linux Wireless Networking]     [Maemo Users]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Trails]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux