RFC: unionfs multiple mounts, cross mounts and recursive mounts limits and manegement feature

2011-04-21 Thread Daichi GOTO
Hi unionfs lovers, It is possible to mount unionfs multiple times more than once at a mount point. However, exceeding multiple mounts could consume kernel stack over its limits and lead a system panic easily. Some users reported that they got a system panic by multiple unionfs mounts. So I make

Re: RFC: unionfs multiple mounts, cross mounts and recursive mounts limits and manegement feature

2011-04-21 Thread Daichi GOTO
On Thu, 21 Apr 2011 11:03:30 +0400 Alex Zimnitsky aa...@yandex.ru wrote: On Thu, 2011-04-21 at 14:49 +0900, Daichi GOTO wrote: It is adjustable with sysctl value 'vfs.unionfs.recursive_limit' as multiple mounts limits. The default value is 1 and it means two-layered ok. Max value of

Re: RFC: unionfs multiple mounts, cross mounts and recursive mounts limits and manegement feature

2011-04-21 Thread Alex Zimnitsky
On Thu, 2011-04-21 at 14:49 +0900, Daichi GOTO wrote: It is adjustable with sysctl value 'vfs.unionfs.recursive_limit' as multiple mounts limits. The default value is 1 and it means two-layered ok. Max value of 'vfs.unionfs.recursive_limit' is 8, it is heuristic value. I couldn't get a