Re: [PATCH 2/7] mmc: Don't use PF_MEMALLOC

[Peter Zijlstra]

On Tue, 2009-11-17 at 21:51 +0900, Minchan Kim wrote:
> I think it's because mempool reserves memory. 
> (# of I/O issue\0 is hard to be expected.
> How do we determine mempool size of each block driver?
> For example,  maybe, server use few I/O for nand. 
> but embedded system uses a lot of I/O. 

No, you scale the mempool to the minimum amount required to make
progress -- this includes limiting the 'concurrency' when handing out
mempool objects.

If you run into such tight corners often enough to notice it, there's
something else wrong.

I fully agree with ripping out PF_MEMALLOC from pretty much everything,
including the VM, getting rid of the various abuse outside of the VM
seems like a very good start.



--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/