Buffer cache

From: Kay Salzwedel (kay@hni.uni-paderborn.de)
Date: Fri Aug 11 2000 - 01:52:13 EST

Hi,

I have a question concerning the buffer cache. Suppose I read data from
a file into a local variable and change it. What happen whe I read it
again? Does linux read from the file or from the buffer cache?

example:
...
read(fd, buf, buf_size);
for (i = 0; i < buf_size; i += 512)
  buf[i] &= 1;
...
read(fd, buf, buf_size); /* where does I read from? */
...

Regards Kay 

-- 
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Kay A Salzwedel

Heinz Nixdorf Institute
University of Paderborn
Germany
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E-Mail:  kay@hni.uni-paderborn.de
Tel.:    +49-5251-60 64 58
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