Messages in this thread | | | Subject | per-bdi-throttling: synchronous writepage doesn't work correctly | From | Miklos Szeredi <> | Date | Thu, 01 Nov 2007 17:49:54 +0100 |
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Hi,
It looks like bdi_thresh will always be zero if filesystem does synchronous writepage, resulting in very poor write performance.
Hostfs (UML) is one such example, but there might be others.
The only solution I can think of is to add a set_page_writeback(); end_page_writeback() pair (or some reduced variant, that only does the proportions magic). But that means auditing quite a few filesystems...
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