Hi, andy_purcell@xxxxxxxxxxxx writes: >> > > And where is your swap? What happens if you just do not have swap at all? >> > Our system has no swap. Running 'top' says 0 total, 0 free, 0 used >> >> then your program can not get swapped out, so this whole thing is crazy. > > Colleague says when there is memory pressure, program code can get > paged out of RAM. only if you have a place where to put it. If you're running out of RAM and have no SWAP, then that would trigger OOM killer. > The way I read your sentence above, program code stays in RAM. yes > What is the right answer? > > Can program code, with no swap and no calls to mlockall(), get paged > out of RAM under extreme memory pressure? no, it would get killed by OOM (out-of-memory) killer. Seems like the problem is elsewhere. Do you have a USB sniffer? I'd say you need to figure out what's going on with the wire. Which controller are you using? Which kernel version? Is there anything interesting on dmesg after the failure? best -- balbi
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