Hi, I recently upgraded to FreeBSD 4.1-RELEASE(CD image). I noticed that while writing to an asynchronously mounted filesystem(mount -o async / ...) all other IO operations to the FS are almost blocked. I have only one asynchronously mounted partition(/) and the following shell script makes the machine unresponsive so I cannot even telnet to it: while true; do rm -f foo; dd if=/dev/zero of=foo bs=1024k count=256; done 4.0-RELEASE does a much better job at handling similar situations... I'm using softupdates, but even without them the problem persists. This does not happen if the fs is mounted synchronously, but I also get MUCH slower IO throughput(800kb/s compared to 12MB/s with async). I know that mounting filesystems asynchronously is dangerous, but this is my workstation and is being backed up on a daily basis, so a filesystem crash is not something I'm worried about... I suspect this is something related to the buffer code and currently have no much time to inspect that. Can somebody give me a hint how to solve the problem? Thank you, Mitja To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
