Re: Fix knfsd readahead cache in 2.4.15

From: David S. Miller (davem@redhat.com)
Date: Mon Nov 26 2001 - 18:53:47 EST


   From: Neil Brown <neilb@cse.unsw.edu.au>
   Date: Tue, 27 Nov 2001 10:35:26 +1100 (EST)
   
   This is definately a bug, but I don't think it is quite as dramatic as
   you suggest.
   
   The "struct raparms" that ra points to will almost always be the last
   one on the list, so ra->p_next will almost always be NULL anyway.
   Nevertheless, it is a bug and your fix looks good.

There are other problems remaining, this function is a logical
mess.

1) depth is computed in the loop, but thrown away.
   It is basically reassigned to a constant before
   being used to index the statistics it is for.

2) raparm_cache is reassigned, and since the ra param list is
   NULL terminated this can make the list shorter and shorter
   and shorter until it is one entry deep.

Yikes :)
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This archive was generated by hypermail 2b29 : Fri Nov 30 2001 - 21:00:24 EST