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SubjectRe: 2.4.21-pre2 stalls out when running unixbench

On Mon, 2003-01-06 at 12:16, Andrew Morton wrote:

> Well personally I prefer slow-and-safe. But we could make 2.4
> do what 2.5 is doing - one pass through the superblocks to start
> the syncs and a second pass to wait on them all.

The 2.5 approach has the problem that it can start queuing writeback for
multiple fs'es on the same disk at the same time --- I wouldn't be
surprised if it increases thrashing in that case. But I guess I'm not
too concerned about sync() performance itself, as long as the in-kernel
background writeback is being done sensibly.

> This is fragile stuff though....



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