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Re: ubc_uiomove returns EINVAL
Date: 2014年10月24日 17:51:28 +0000
From: David Holland <dholland-tech%netbsd.org@localhost>
Message-ID: <20141024175128.GA27564%netbsd.org@localhost>
| On Sat, Oct 25, 2014 at 12:33:44AM +0700, Robert Elz wrote:
| > (there's another place where the error [from VOP_GETPAGES], if any,
| > looks to be ignored).
|
| That doesn't sound real healthy :(
It's in uvm_fault_lower_lookup() ...
(void) uobj->pgops->pgo_get(uobj,
ufi->entry->offset + flt->startva - ufi->entry->start,
pages, &gotpages, flt->centeridx,
flt->access_type & MASK(ufi->entry), ufi->entry->advice, PGO_LOCKED)
;
(excuse possible extra line wrapping caused by cut/paste from an xterm
running vi).
The (void) makes it pretty clear that the error (if any) is being
deliberately ignored - but it is way beyond my competence to even
speculate as to whether it is healthy or not. All that matters to
me is that I don't see how that one could be sending an EINVAL (if it
happened there) back to ubc_uiomove(), so I get to ignore it!
kre
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