Re: readdir & bonnie++

["Bob Copeland" <me@bobcopeland.com>]

On 6/1/06, Tomas Hruby <thruby@few.vu.nl> wrote:
> Bonnie++ creates a directory with 16384 files. Then it calls readdir in a loop
> to read all the entries and calls stat for each. The test fails since only 16383
> entries were returned (one is missing). According to my logs our readdir calls
> filldir on the last item as well. Also strace says that all entries were
> returned. But the last one is missing.

Possibly unrelated, but I saw something similar in my filesystem.  A
simple loop calling readdir would fail, but explicit calls to getdents
worked properly (and whatever ls did also worked).  In my case, I was
playing games with d_off (filp->fpos) that caused d_off to overflow 32
bits.  Then glibc would detect this and be "smart" -- seek back to
some point and start over to read up to the overflow.  Eliminating the
overflows fixed it.