UBI memory leak after creating and removing volumes
Artem Bityutskiy
dedekind at infradead.org
Tue Feb 17 07:23:57 EST 2009
On Tue, 2009-02-17 at 12:01 +0000, John.Smith at pace.com wrote:
> Hello,
> I am using a 2.6.18 Kernel, patched with MTD from Kernel 2.6.21, and
> UBI from the mainline kernel a few days later on 1 May 2007. The
> whole is running on an embedded MIPS device.
>
> I have NAND, and UBI, and gluebi, and jffs2. I use jffs2, mounted on
> an mtdblock device. Broadly, it all works.
>
> I am experiencing a memory leak revealed in recent stress tests. The
> stress tests create and delete many UBI volumes, and are are broadly
> equivelent to the following:
Can you please enable /proc/slab_allocators - it tracks all allocators
and if we have a leak - it may point to the function which is guilty.
To have /proc/slab_allocators, do the following:
1. Enable SLAB, not SLUB. In kernel config menu got to
"General setup --->", then
"Choose SLAB allocator (SLUB (Unqueued Allocator)) --->"
and choose SLAB.
2. Go to the root menu, then go to
"Kernel hacking --->" and enable
"[*] Debug slab memory allocations" and
"[*] Memory leak debugging"
Recompile the kernel, and you will have a nice instrumentation to find
memory leak - the /proc/slab_allocators file. Please, play with this.
--
Best regards,
Artem Bityutskiy (Битюцкий Артём)
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