On Sat, 16 Aug 2014 10:40:54 +0200 mdraid.pkoch@dfgh.net (Peter Koch) wrote:

Dear readers,

I am shrinking my raid10-array consiting of 16 2TB disks
to 13 disks right now. Reshaping runs for 2 hours and
I'm constantly obervng /proc/mdstat and /proc/meminfo

SUnreclaim is constantly growing while MemFree and
MemAvailable are decreasing.

Seems like linux 3.14.16 is leaking memory at a rate
of 4GB per 1TB of reshape data.

Hmm... don't know about that bug.
Does /proc/slabinfo show some slab much bigger than the rest?

My machine has 32GB of RAM and if I interpolate the current
memory-values I will run out of mem at 80% of the reshape
operation. This is exactly what happened to me with
linux-3.14.12.

If you gracefully shutdown and reboot it should keep pick up where it left
off but with more memory free.

Do I need linux-3.14.17 ??

The only bug I know of was fixed in 3.14.6.
I said 3.14.16 before - sorry about typo.

I'll if I can reproduce it myself some time next week.

NeilBrown

Kind regards

Peter Koch
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