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Date: Thu, 01 Nov 2007 17:49:54 +0100 From: Miklos Szeredi <miklos@...redi.hu> To: a.p.zijlstra@...llo.nl CC: jdike@...toit.com, linux-mm@...ck.org, linux-kernel@...r.kernel.org Subject: per-bdi-throttling: synchronous writepage doesn't work correctly 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... Miklos - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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