On Tue, Sep 24, 2013 at 09:20:14AM -0400, Mike Snitzer wrote: > On Tue, Sep 24 2013 at 7:00am -0400, > Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > > > Just curious, what's the state of the remaining immutable bio work? > > Hey Christoph, > > Have you been over the patchset? Looks sane to you? > > Given how disruptive this patchset is to the block layer I'm wondering > how painful this change will be in combination with Jens' blk-mq > changes. I'd prefer to see blk-mq before immutable biovecs; but I have > my own selfish reasons for that. > > I'm also concerned about DM regressions given that a lot of DM code to > handle splitting a bio that spans target boundaries is ripped out, see: > https://patchwork.kernel.org/patch/2840657/ Oh good, you had seen that :) Are you worried about performance regressions or actual bugs? I _have_ explicitly tested that code path, but I don't know what corner cases I may have missed so it definitely needs your eyeballs and testing too. As for performance - this'll be more efficient than what the dm code was doing before. Especially when the multipage bvec patches go in. > But that is just handwaving/FUD at this point cause I haven't put the > time to looking at this patchset close enough to feel comfortable. I > can make reviewing this patchset a priority this week though. > > Kent, have you rebased this patchset at all? Do you have a git tree I > can clone to save the pain of pulling these patches out my my mbox, > etc. Yeah: git://evilpiepirate.org/~kent/linux-bcache.git for-jens -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
