On Fri, Nov 11, 2016 at 04:43:57PM +0200, Amir Goldstein wrote: > > Surely, the copying of data itself is outside of that lock, isn't it? > > Mmmmmm, no it isn't, but I am going to make it right. Well, if you really have the copyup itself done under lock_rename(), you are looking at potentially copying gigabytes of data from r/o layer to workdir under fs-wide lock. _That_ is really asking for contention from hell, and for no good reason. Renames/whiteout creations/removals are trivial noise compared to that. I'm somewhat surprised, TBH - I thought the copyup itself is done outside of that thing. Are you sure it really isn't? -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
