From: Oliver Neukum (oneukum@xxxxxxxx) Sent: Wed, 17 May 2017 09:44:20 +0200 > Am Dienstag, den 16.05.2017, 20:24 +0200 schrieb Bjørn Mork: >> >> I must say that I don't like the additional complexity added here. If >> there are memory issues and you can reduce the buffer size to >> USB_CDC_NCM_NTB_MIN_OUT_SIZE, then why don't you just set a lower tx_max >> buffer size in the first place? >> >> echo 2048 > /sys/class/net/wwan0/cdc_ncm/tx_max >> Hi The issue is we need the higher performance for Mirrorlink to be able to work correctly. The low memory situation only occurs very occasionally and once the kernel has run compaction if this issue occurs again it will be many hours later. > > Hi, > > that would hurt performance across the board though. > Can we trigger memory compactation earlier? > > Regards > Oliver > We initially tried increasing the vm.min_free_kbytes but the value needed to address the problem was around 65536 which then meant some other applications were unable to run due to there not being enough free memory. The i.MX6 based system has 863MB of RAM in total. Regards, Jim -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
