Re: Core dumps for threads

From: Alan Cox (
Date: Sun Feb 25 2001 - 08:57:31 EST

> On Sat, Feb 24, 2001 at 09:57:44PM +0000, Alan Cox wrote:
> The I/O to dump the core would race other changes on the mm. The
> right fix is probably to copy the mm (as fork does) then dump the
> copy.
> Stupid question... but since all threads see the same memory space as
> each other; can we not lock the entire vma for the process whilst
> it's being written out?

It isnt the vma, its the entire mm you would need to lock. And I dont think
you can do a deadlock free lock of that sanely, hence its better to copy
the mm (thats pretty efficienty anyway as it wont copy the data)

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This archive was generated by hypermail 2b29 : Wed Feb 28 2001 - 21:00:09 EST