From: Brian Foster Date: Wed, 3 Dec 2014 22:43:17 +0000 (+1100) Subject: xfs: split metadata and log buffer completion to separate workqueues X-Git-Tag: omap-for-v3.19/fixes-rc1~115^2^2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b29c70f59870dad0945b0e0b3fe3758ad528e268;p=pandora-kernel.git xfs: split metadata and log buffer completion to separate workqueues XFS traditionally sends all buffer I/O completion work to a single workqueue. This includes metadata buffer completion and log buffer completion. The log buffer completion requires a high priority queue to prevent stalls due to log forces getting stuck behind other queued work. Rather than continue to prioritize all buffer I/O completion due to the needs of log completion, split log buffer completion off to m_log_workqueue and move the high priority flag from m_buf_workqueue to m_log_workqueue. Add a b_ioend_wq wq pointer to xfs_buf to allow completion workqueue customization on a per-buffer basis. Initialize b_ioend_wq to m_buf_workqueue by default in the generic buffer I/O submission path. Finally, override the default wq with the high priority m_log_workqueue in the log buffer I/O submission path. Signed-off-by: Brian Foster Reviewed-by: Dave Chinner Signed-off-by: Dave Chinner --- Reading git-diff-tree failed