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SubjectRe: iwl3945: order 5 allocation during ifconfig up; vm problem?
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On Tue, 2012-09-11 at 16:25 -0700, Andrew Morton wrote:

> Asking for a 256k allocation is pretty crazy - this is an operating
> system kernel, not a userspace application.
>
> I'm wondering if this is due to a recent change, but I'm having trouble
> working out where the allocation call site is.
> --

(Adding Marc Merlin to CC, since he reported same problem)

Thats the firmware loading in iwlwifi driver. Not sure if it can use SG.

drivers/net/wireless/iwlwifi/iwl-drv.c

iwl_alloc_ucode() -> iwl_alloc_fw_desc() -> dma_alloc_coherent()

It seems some sections of /lib/firmware/iwlwifi*.ucode files are above
128 Kbytes, so dma_alloc_coherent() try order-5 allocations


# ls -l /lib/firmware/iwlwifi*.ucode
-rw-r--r-- 1 root root 335056 2012-01-23 18:20 /lib/firmware/iwlwifi-1000-3.ucode
-rw-r--r-- 1 root root 337520 2012-01-23 18:20 /lib/firmware/iwlwifi-1000-5.ucode
-rw-r--r-- 1 root root 689680 2012-01-24 19:18 /lib/firmware/iwlwifi-105-6.ucode
-rw-r--r-- 1 root root 701228 2012-01-24 19:18 /lib/firmware/iwlwifi-135-6.ucode
-rw-r--r-- 1 root root 695876 2012-01-24 19:19 /lib/firmware/iwlwifi-2000-6.ucode
-rw-r--r-- 1 root root 707392 2012-01-24 19:19 /lib/firmware/iwlwifi-2030-6.ucode
-rw-r--r-- 1 root root 150100 2012-01-23 18:20 /lib/firmware/iwlwifi-3945-2.ucode
-rw-r--r-- 1 root root 187972 2012-01-23 18:20 /lib/firmware/iwlwifi-4965-2.ucode
-rw-r--r-- 1 root root 345008 2012-01-23 18:20 /lib/firmware/iwlwifi-5000-1.ucode
-rw-r--r-- 1 root root 353240 2012-01-23 18:20 /lib/firmware/iwlwifi-5000-2.ucode
-rw-r--r-- 1 root root 340696 2012-01-23 18:21 /lib/firmware/iwlwifi-5000-5.ucode
-rw-r--r-- 1 root root 337400 2012-01-23 18:20 /lib/firmware/iwlwifi-5150-2.ucode
-rw-r--r-- 1 root root 462280 2012-01-24 19:20 /lib/firmware/iwlwifi-6000-4.ucode
-rw-r--r-- 1 root root 444128 2012-01-24 19:20 /lib/firmware/iwlwifi-6000g2a-5.ucode
-rw-r--r-- 1 root root 460912 2012-01-24 19:20 /lib/firmware/iwlwifi-6000g2b-5.ucode
-rw-r--r-- 1 root root 679436 2012-01-24 19:19 /lib/firmware/iwlwifi-6000g2b-6.ucode
-rw-r--r-- 1 root root 463692 2012-01-23 18:20 /lib/firmware/iwlwifi-6050-4.ucode
-rw-r--r-- 1 root root 469780 2012-01-23 18:20 /lib/firmware/iwlwifi-6050-5.ucode




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