Re: [PATCH] Re: zero-filed page on VOP_PUTPAGES

[yamt%mwd.biglobe.ne.jp@localhost (YAMAMOTO Takashi)]

> YAMAMOTO Takashi <yamt%mwd.biglobe.ne.jp@localhost> wrote:
> 
>> ioflush (syncer) is not a kernel thread responsible for freeing memory.
>> pagedaemon is.
>> 
>> i don't think syncer alone can deadlock with puffs.
> 
> Indeed it does not: there is at least a third thread involved. In a
> typical case, ioflush sleeps awaiting for perfused/glusterfsd to finish
> fsync, and perfused/glusterfsd is stuck in the kernel awaiting memory
> allocation.

my bet is that ioflush is merely a victim of the deadlock.

YAMAMOTO Takashi

> 
> -- 
> Emmanuel Dreyfus
> http://hcpnet.free.fr/pubz
> manu%netbsd.org@localhost