[Bug nscd/5381] nscd: Race condition of mempool_alloc() .. cache_add() and gc()

[pasky at suse dot cz]

------- Additional Comments From pasky at suse dot cz  2008-11-26 13:40 -------
Created an attachment (id=3078)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=3078&action=view)
proposed patch #2

This is a proposed patch; currently, it seems to work fine - we have one
reported crash in nscd, but I don't think it is related so far.

This is a very simple approach - in theory, there could be a "gap area" near
the top of the database that could grow indefinitely across gc() calls if
_every_ gc() call would happen while there is some memory in flight, but based
on my real-world nscd observations, I don't think this is realistic scenario
even with very busy nscd; if your experience is different, we can go for a more
complex patch that makes mempool_alloc() try to fit data into this gap area.

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=5381

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