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发信人: CuteGuy (这个春天有点冷), 信区: Linux
标  题: Potential problem with kernel 2.2.4
发信站: BBS 水木清华站 (Thu Mar 25 09:53:20 1999) WWW-POST

Potential problem with kernel 2.2.4
  Mar 24th, 11:57:19

Linus Torvalds has released a one-liner fix to
the 2.2.4 kernel, which contains a bug that might
cause problems on heavily loaded servers.

Linus writes:

There's a potential problem under certain load
conditions with 2.2.4, which should be fixed by
this one-liner. If you have trouble with 2.2.4
(apart from the obvious one where you have to
add ", NULL" to two places in kernel/acct.c),
would you try this simple thing?

Note that I _really_ want to hear about if if
this makes any difference at all. It's a real
bug, but I think it needs some rather pathological
usage patterns to actually become a real problem.
So I'd like to know if it actually makes a difference
in real life...

Linus

-----
--- v2.2.4/linux/fs/buffer.c    Tue Mar 23 14:35:48 1999
+++ linux/fs/buffer.c   Wed Mar 24 09:11:53 1999
@@ -854,6 +854,7 @@
         return;
     }
     remove_from_queues(buf);
+   buf->b_count = 0;
     put_last_free(buf);
  }

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