On Thu, 2005-01-06 at 22:00 +0000, Hugh Dickins wrote:

> Curious.  I regularly check that swapoff is working (though not suspend
> and resume), and have not noticed this.  You fill memory so the machine
> swaps, let the memory hog exit, then swapoff hangs indefinitely (not just
> taking a long time)?  With no suspend+resume since booting at all?

No suspend or resume involved, just a normal boot.

Steps to reproduce:

1. fill memory so it swaps
2. stop memory hog
3. swapoff -a

I'm pretty sure it's an infinite loop, I left it like that while
shaving. It produces the same sound over and over again as the head
seeks back in order to try again and again...

> How much memory?  How much swap?  What .config?  I'll try it tomorrow.

768MB ram, 1.2GB swap, .config attached

Before memory hog:

# free
             total       used       free     shared    buffers     cached
Mem:        775664     110868     664796          0       4696      60420
-/+ buffers/cache:      45752     729912
Swap:      1226224          0    1226224

After memory hog:

# free
             total       used       free     shared    buffers     cached
Mem:        775664      36180     739484          0        140       7224
-/+ buffers/cache:      28816     746848
Swap:      1226224      27984    1198240

After swapoff:

# free
             total       used       free     shared    buffers     cached
Mem:        775664      53972     721692          0        268      11816
-/+ buffers/cache:      41888     733776
Swap:      1226224       2912    1223312

Running swapoff again produces the same behaviour and the amount of swap
used does not decrease.

I hope you can reproduce it.

-- 
/Martin