[PATCH] ext3 scheduling latency fix
Sometimes kjournald has to refile a huge number of buffers, because someone else wrote them out beforehand - they are all clean. This happens under a lock and scheduling latencies of 88 milliseconds on a 2.7GHx CPU were observed. The patch forward-ports a little bit of the 2.4 low-latency patch to fix this problem. Worst-case on ext3 is now sub-half-millisecond, except for when the RCU dentry reaping softirq cuts in :(
Showing
Please register or sign in to comment