Hi, We are facing the same issue. Did you get any solution for this? Thanks in advance. BR Sagar sangi.hs_gmail.com
On Thursday, July 12, 2012 10:26:32 PM UTC+3, m-ric wrote: > > Hi, > > I run AOSP-4.0.4 on a pandaboard rev A3. I got linux kernel from > remotes/android-omap/android-omap-panda-3.0 branch, 52f4764 commit > "Revert gpu: pvr: Revert to 1.8@550175". > > With this software: > 1. Ethernet bandwidth is very low, barely usable for file transfers. > TX gets stuck, I measured 20KBps. RX is quite slow too. > 2. USB storage on USB host port suffers same limitations. I measured > ~100KBps. > > Problem is known though, fedora- and ubuntu guys saw it: > http://article.gmane.org/gmane.linux.redhat.fedora.arm/1266 > https://bugs.launchpad.net/linux-linaro/+bug/709245 > > My kernel embeds Ming Lei's barrier patch in ehci-q.c: > usb: ehci: make HC see up-to-date qh/qtd descriptor ASAP > and Will Deacon's ARM errata CONFIG_PL310_ERRATA_769419: > ARM: 7161/1: errata: no automatic store buffer drain > I checked that asm on this latter commit is fine (dsb instr.). > > Still above bugs are still present. For fedora and ubuntu guys though, > above fixes have solved the problem. > I am reluctant to change my (entire) kernel because everything else > that I need works fine. I am in a maturation phase, not in a > development phase anymore. > > Does anyone experience that on pandaboard and aosp? > Did you find any workaround? > > I have been on this bug for 4 weeks now. I am kind of desperate right > now. -- unsubscribe: android-kernel+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-kernel
