Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Thu, 13 May 2004, Mark Olliver wrote: > >drbd related: > > > > drbd seems to work fine, as well as module, and as "monolithic" build. > > > > XFS seems to work on top of DRBD within uml, and survives a tiobench. > > but sometimes, if you copy many files, it get stuck waiting for some xfs > > internal semaphore to be released, which never happens. > > > > this only shows on top of drbd, not using the underlying ubd directly, > > but seems to be a xfs internal problem, since it even shows when DRBD > > is "virgin standalone", just passing request to the lower level device, > > and passing end_io events up to the upper levels. with a recently > > introduce atomic counter I can *prove* that drbd did the correct endio. > > > > only xfs seems to not up its own semaphore properly... > > as soon as this is reproducable in real systems (where currently xfs on > > top of DRBD seems to have all sorts of other weird problems, which I > > doubt are DRBDs fault... only xfs does not expect the restrictions that > > the DRBD requests queue imposes), this needs to be sorted out with the > > XFS guys... maybe it's related to this: http://marc.theaimsgroup.com/?l=linux-xfs&m=108434513705289&w=2 -m