Re: g->GCthreshold overflow, possible bug?
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- Subject: Re: g->GCthreshold overflow, possible bug?
- From: Roberto Ierusalimschy <roberto@...>
- Date: 2012年8月13日 11:17:09 -0300
> Today I noticed some strange behavior in my lua application:
> My application disables lua autogc and manually calls
> lua_gc(LUA_GCSTEP) regularly. When memory usage exceeds 2G, each
> call to lua_gc(LUA_GCSTEP) becomes a full gc cycle (retval = 1).
> I managed to track down the cause of this problem to the following
> line in lgc.c:
>
> #define setthreshold(g) (g->GCthreshold = (g->estimate/100) * g->gcpause)
>
> When g->estimate exceeds 2G and gcpause remains its default value
> 200, GCthreshold will overflow uint32 range.
> [...]
>
> Is this a bug?
Yes.
> Is there any known solution for this?
Did you try to change the pause to 100, to avoid the overflow?
-- Roberto