Messages in this thread | | | Subject | Re: scsi_set_medium_removal timeout issue | From | Oliver Neukum <> | Date | Tue, 30 Oct 2018 09:56:26 +0100 |
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On Di, 2018-10-30 at 08:28 +0000, Zengtao (B) wrote: > Hi
> For the issue itself, there is my observation: > In the step 4, the Host will issue an PREVENT_ALLOW_MEDIUM_REMOVAL scsi command. > and and timeout happens due to the device 's very slow fsg_lun_fsync_sub. > I found there are two methods to workaround the issue: > 1. Change the timeout value of host scsi command PREVENT_ALLOW_MEDIUM_REMOVAL to > to about 60 seconds from 10 seconds.
That is near useless, because the gadget can be used with other systems.
> 2. Remove the fsg_lun_fsync_sub in the device's Mass storage gadget driver.
It exists for a reason. The blocks have to be on the medium. It seems to me that your gadget just allows too many dirty pages in the cache.
Regards Oliver
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