YAMAMOTO Takashi <y...@mwd.biglobe.ne.jp> wrote:
> the pagedaemon stays sleeping because there's already enough paging
> requests in-progress. (see "paging=" in the ddb show uvm output.)
> it (reasonably) assumes i/o will complete "soon".
The offending code would be
void
uvm_kick_pdaemon(void)
{
KASSERT(mutex_owned(&uvm_fpageqlock));
if (uvmexp.free + uvmexp.paging < uvmexp.freemin ||
(uvmexp.free + uvmexp.paging < uvmexp.freetarg &&
uvmpdpol_needsscan_p())) {
wakeup(&uvm.pagedaemon);
}
}
My uvm stats gives me this, and indeed nothing wakes up pagedaemon:
uvmexp.free = 1
uvmexp.paging = 907
uvmexp.freemin = 256
uvmexp.freetarg = 341
But I would expect paging requests to complete one day, why would thet
remain in progress forever?
--
Emmanuel Dreyfus
http://hcpnet.free.fr/pubz
m...@netbsd.org
