Hi Alan, >-----Original Message----- >From: Alan Stern [mailto:stern@xxxxxxxxxxxxxxxxxxx] >Sent: Monday, May 16, 2011 3:49 PM >To: Nguyen Dinh-R00091 >Cc: linux-usb@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; daniel@xxxxxxxx; >grant.likely@xxxxxxxxxxxx; u.kleine-koenig@xxxxxxxxxxxxxx; s.hauer@xxxxxxxxxxxxxx; Mahadevan Mahesh- >R9AADQ >Subject: Re: USB issue on Freescale's i.MX35 3-stack board > >On Mon, 16 May 2011, Nguyen Dinh-R00091 wrote: > >> Hi, >> >> On the Freescale i.MX35 3DS board, there is a total of 256MB of DDR2 and the configuration is 128MB >on Chip-select 0 and 128MB on chip-select 1. So physically, the memory is not contiguous, so we boot >up the system with these mem= parameters(mem=128M@0x80000000 mem=128M@0x90000000). The system seems to >be operating fine and passes stress testing using memtester and oprofile, except for USB. >> >> Running a USB copy stress test on USB mass storage between a USB HDD and an SD/MMC card causes the >system to hang. The hang can occur at any time between 10 minutes to 2 hours. The hang is much harder >to re-create if logs or delays are introduced. > >Your test involves both the USB and MMC subsystems. How can you tell >which one is responsible for the hang? > >Have you tried testing these subsystems one at a time? Yes, I've stress tested on USB alone and MMC alone. The issue doesn't seem to appear with a MMC test, but appears when I am moving files between 2 USB HDDs. I apologize for not adding that additional data point on my original email. Dinh > >Alan Stern > -- 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
