On Fri, 8 Feb 2008 02:45:32 +0000 Alasdair G Kergon <agk@xxxxxxxxxx> wrote: > dm: move deferred bio flushing to workqueue To my unpracticed eye this one looks fairly fundamental. Unfortunately the changelog: Add a single-thread workqueue for each mapped device and move flushing of the lists of pushback and deferred bios to this new workqueue. tells us nothing of the reasons for this change. (It should have done so!) It _looks_ pretty unscalable. Perhaps these deferred BIOs don't happen very often? -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel