Messages in this thread Patch in this message |  | | Date | Thu, 20 Sep 2001 20:47:12 +0200 | From | Andrea Arcangeli <> | Subject | Re: [PATCH] Significant performace improvements on reiserfs systems |
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On Thu, Sep 20, 2001 at 01:19:53PM -0400, Chris Mason wrote: > > > On Thursday, September 20, 2001 07:08:25 PM +0200 Dieter Nützel > <Dieter.Nuetzel@hamburg.de> wrote: > > > > Please have a look at Robert Love's Linux kernel preemption patches and > > the conversation about my reported latency results. > > > > Andrew Morton has patches that significantly improve the reiserfs latency, > looks like the last one he sent me was 2.4.7-pre9. He and I did a bunch of > work to make sure they introduce schedules only when it was safe. > > Andrew, are these still maintained or should I pull out the reiserfs bits?
May not help latency but I suspect this could help reiserfs, it should basically be a noop for ext2.
--- 2.4.10pre12aa2/fs/buffer.c.~1~ Thu Sep 20 20:14:19 2001 +++ 2.4.10pre12aa2/fs/buffer.c Thu Sep 20 20:45:58 2001 @@ -2506,7 +2506,7 @@ spin_unlock(&free_list[isize].lock); page->buffers = bh; - page->flags &= ~(1 << PG_referenced); + page->flags |= 1 << PG_referenced; lru_cache_add(page); UnlockPage(page); atomic_inc(&buffermem_pages); You may want to give it a spin.
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