Tejun Heo <tj@xxxxxxxxxx> writes: > Chris Webb wrote: > > > Would such very slow (but ultimately successful) flushes be > > consistent with the theory of power supply issues affecting the > > drives? It feels like the 30s timeouts on flush could be just a more > > severe version of the 15s very slow flushes. > > Probably not. Power problems usually don't resolve themselves with > longer timeout. If the drive genuinely takes longer than 30s to > flush, it would be very interesting tho. That's something people have > been worrying about but hasn't materialized yet. The timeout is > controlled by SD_TIMEOUT in drivers/scsi/sd.h. You might want to bump > it up to, say, 60s and see whether anything changes. I'll add that to the list of things to check out on the test machine with a more disposable installation on it! The 15s flushes we're seeing on superblock barrier writes do already feel dangerously close to the 30s hardcoded timeout to me: it's only a factor of two. Cheers, Chris. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
