Re: [PATCH 2/5] writeback: stop periodic/background work on seeingsync works

[Wu Fengguang]

> >   Fengguang, how about merging also the attached simple patch together with
> > my fix? With these two patches, I'm not able to trigger any sync livelock
> > while without one of them I hit them quite easily...
> 
> This looks OK. However note that redirty_tail() can modify
> dirtied_when unexpectedly. So the more we rely on wb_start, the more
> possibility an inode is (wrongly) skipped by sync. I have a bunch of
> patches to remove redirty_tail(). However they may not be good
> candidates for 2.6.36..

It looks that setting wb_start at the beginning of
writeback_inodes_wb() won't be easily affected by redirty_tail().

So

Reviewed-by: Wu Fengguang <fengguang.wu@xxxxxxxxx>

Thanks,
Fengguang
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/