I have often experienced nearly full system freezes for up to five seconds at a time while memory is being flushed to disk. I'm not sure if this is a general Linux problem or a Reiser4 problem, so I thought I'd ask. A sysrq-T during the freeze shows many processes trying to acquire a memory page, and Reiser4 flushing atoms and doing sync things. My working theory right now is that Reiser4 spends time flushing a lot of data at once before returning. If I am right about that, would it not make more sense to flush a few pages, return to the kernel, flush a few more pages, return to the kernel, etc, etc? That way programs could get a bit of RAM and make some progress. Of course I could be completely off about what's going on. -- Zan Lynx <zlynx@xxxxxxx>
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