Re: xdr nfs highmem deadlock fix [Re: filesystem access slowing system to a crawl]

From: Trond Myklebust (trond.myklebust@fys.uio.no)
Date: Thu Feb 20 2003 - 17:56:14 EST


>>>>> " " == Andrea Arcangeli <andrea@suse.de> writes:

> 2.5.62 has the very same deadlock condition in xdr triggered by
> nfs too.
> Andrew, if you're forward porting it yourself like with the
> filebacked vma merging feature just let me know so we make sure
> not to duplicate effort.

For 2.5.x we should rather fix MSG_MORE so that it actually works
instead of messing with hacks to kmap().

For 2.4.x, Hirokazu Takahashi had a patch which allowed for a safe
kmap of > 1 page in one call. Appended here as an attachment FYI
(Marcelo do *not* apply!).

Cheers,
  Trond



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