YAMAMOTO Takashi <y...@mwd.biglobe.ne.jp> wrote: > > This avoids deadlocks in the following situations: > > 1) when memory is low: ioflush waits the fileystem, the fielsystem waits > > for memory > can you explain how it is a problem?
As I understand, one way to free memory is to flush vnode backed pages to the backend storage. If ioflush calls VOP_FSYNC on a memory-starved userland filesystem, it will get stuck until the filesystem gets memory again, and while it is stuck, it does not help freeing memory. -- Emmanuel Dreyfus http://hcpnet.free.fr/pubz m...@netbsd.org
