Messages in this thread | | | Date | Mon, 16 Jan 2017 09:32:20 -0800 | From | Christoph Hellwig <> | Subject | Re: [PATCH 5/6] f2fs: add a kernel thread to issue discard commands asynchronously |
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On Fri, Jan 13, 2017 at 11:12:11AM -0800, Jaegeuk Kim wrote: > Previously, I've done to issue discard bios asynchronously. But the problem that > I've got is that was not enough. When testing nvme SSD with noop IO scheduler, > submit_bio() was blocked at every 8 async discard bios, resulting in very slow > checkpoint process which blocks most of other FS operations.
Where does it block? Are you running out of request? What driver is this on top of?
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