Messages in this thread |  | | Date | Sun, 13 May 2001 20:04:41 -0300 (BRST) | From | Rik van Riel <> | Subject | Re: Another VM race? (was: page_launder() bug) |
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On Sun, 13 May 2001, Mikulas Patocka wrote:
> CPU 0 CPU 1 > is executing the code marked is executing try_to_free_buffers on > above with ^^^^^^^: the same page (it can be, because CPU 0 > did not lock the page) > > (page->buffers && > > page->buffers = NULL > > MAJOR(page->buffers->b_dev) == > RAMDISK_MAJOR)) ===> Oops, NULL pointer dereference! > > > > Maybe compiler CSE optimization will eliminate the double load of > page->buffers, but we must not rely on it. If the compiler doesn't > optimize it, it can produce random oopses.
You're right, this should be fixed. Do you happen to have a patch ? ;)
regards,
Rik -- Virtual memory is like a game you can't win; However, without VM there's truly nothing to lose...
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