Subject: [PATCH 0/4] writeback: tracing and wbc->nr_to_write fixes
Date: Tuesday 20th April 2010 02:41:50 UTC (over 6 years ago)
This series contains the initial writeback tracing patches from Jens, as well as the extensions I added to provide visibility into writeback control structures as the are used by the writeback code. The visibility given is sufficient to understand what is happening in the writeback path - what path is writing data, what path is blocking on congestion, etc, and to determine the differences in behaviour for different sync modes and calling contexts. This tracing really needs to be integrated into mainline so that anyone can improve the tracing as they use it to track down problems in our convoluted writeback paths. The remaining patches are fixes to problems that the new tracing highlighted.