[issue1872] nfs stall

["Thomas Nikolajsen \(via DragonFly issue tracker\)" <sinknull@xxxxxxxxxxxxxxxxxxxxx>]

Thomas Nikolajsen <thomas.nikolajsen@mail.dk> added the comment:

This issue seems to be real
(not caused by disk, issue mentioned in prev. message).

Connecting disk directly to host (vs via disk enclosure w/ sata-sata bridge),
doesn't change symptoms regarding nfs: it still stalls.

Nfs stall is usually seens, after building a few kernels;
especially if nfs client also does other use of nfs mounts:
e.g. `du usr/src; du /usr/obj'.

A new forced crash dump will be uploaded later today,
this is test case without disk CRC errors.
(I guess present crash dump (*.23) reflects nfs/networking problem,
i.e. that is isn't affected by disk CRC errors though)

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<http://bugs.dragonflybsd.org/issue1872>
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