Re: Reboot while booting with new per-CPU allocator

On Thu, 16 Jun 2005, Robert Watson wrote:

>> Great :) It did the trick. The laptop is happily booting with the new 
>> allocator now. Thanks a lot to you and Alan Cox.
>
> Looks like what basically happened is this these kern_malloc.c changes 
> increase the memory burden on UMA as statistics structures for malloc 
> types now get allocated from UMA.  It looks like, from your dmesg, you 
> have a fair number of modules loaded, so the storage for the statistics 
> comes out of the early UMA page pool, whereas before it came out of BSS. 
> We'll see if further tuning is required or not with large numbers of 
> modules.  The thing that surprised me, though, is the unclean failure 
> mode.  The other report saw a clean panic which presumably made 
> debugging it much easier...

Interestingly, there's been a bunch of reports of this in the past few 
days, and there weren't immediately after the malloc commit.  I wonder if 
some other recent change has increased the amount of UMA memory allocated 
early in the boot, increasing the level of reports...

Robert N M Watson