Messages in this thread | | | Date | Fri, 13 Nov 2020 19:08:21 +0800 | From | Carl Huang <> | Subject | Re: Regression: QCA6390 fails with "mm/page_alloc: place pages to tail in __free_pages_core()" |
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On 2020-11-13 16:17, Pavel Procopiuc wrote: > Op 12.11.2020 om 11:48 schreef David Hildenbrand: >> Trying to understand the code, it looks like there are always two >> rounds of reqests. The first one always fails ("requesting one big >> chunk of DMA memory"), the second one (providing multiple chunks of >> DMA memory) is supposed to work - and we do allocate memory. >> >> >> In the *working* cases we have >> >> Respond mem req failed, result: 1, err: 0 >> qmi failed to respond fw mem req:-22 >> ... >> chip_id 0x0 chip_family 0xb board_id 0xff soc_id 0xffffffff >> >> We don't fail in qmi_txn_wait() - second request w >> >> >> In the *non-working* cases we have >> >> Respond mem req failed, result: 1, err: 0 >> qmi failed to respond fw mem req:-22 >> ... >> qmi failed memory request, err = -110 >> qmi failed to respond fw mem req:-110 >> >> We fail in qmi_txn_wait(). We run into a timeout (ETIMEDOUT). >> >> Can we bump up the timeout limit and see if things change? Maybe FW >> needs more time with other addresses. > > I tried increasing ATH11K_QMI_WLANFW_TIMEOUT_MS 20 times to 100000 > (i.e. 100 seconds) and it didn't have any positive effect, the second > error (-110) just came 100 seconds later and not 5. > Checked some logs. Looks when the error happens, the physical address are very small. Its' between 20M - 30M.
So could you have a try to reserve the memory starting from 20M? Add "memmap=10M\$20M" to your grub.cfg or edit in kernel parameters. so ath11k can't allocate from these address.
Or you can try to reserve even larger memory starting from 20M.
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