Messages in this thread | | | From | Linus Torvalds <> | Date | Fri, 20 Sep 2019 16:10:01 -0700 | Subject | Re: [PATCH v2] mm: implement write-behind policy for sequential file writes |
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On Fri, Sep 20, 2019 at 4:05 PM Linus Torvalds <torvalds@linux-foundation.org> wrote: > > > Now, I hear you say "those are so small these days that it doesn't > matter". And maybe you're right. But particularly for slow media, > triggering good streaming write behavior has been a problem in the > past.
Which reminds me: the writebehind trigger should likely be tied to the estimate of the bdi write speed.
We _do_ have that avg_write_bandwidth thing in the bdi_writeback structure, it sounds like a potentially good idea to try to use that to estimate when to do writebehind.
No?
Linus
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