Re: [PATCH] writeback: avoid possible balance_dirty_pages() lockup on a light-load bdi

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To: Fengguang Wu <wfg@...>

Cc: Andrew Morton <akpm@...>, Greg KH <gregkh@...>, Chakri n <chakriin5@...>, Peter Zijlstra <a.p.zijlstra@...>, Krzysztof Oledzki <olel@...>, linux-pm <linux-pm@...>, lkml <linux-kernel@...>, richard kennedy <richard@...>, Ingo Molnar <mingo@...>

Subject: Re: [PATCH] writeback: avoid possible balance_dirty_pages() lockup on a light-load bdi

Date: Tuesday, October 2, 2007 - 2:35 pm

On 10/02/2007 09:27 AM, Fengguang Wu wrote:
quoted text> On Tue, Oct 02, 2007 at 08:13:27PM +0800, Fengguang Wu wrote:
> [...]
>> One more serious problem is, a busy writer could also drain all the
>> dirty pages and make (nr_writeback == dirty_limit+1MB). In that case,
>> I suspect the light-load sdb writer still have good chance to
>> make progress(need confirmation).
> 
> Well it seems to be a really tricky issue without knowing the per-bdi
> numbers. Maybe we could just encourage users to upgrade to 2.6.24...
> 

Yeah, and if that doesn't work there's always 2.6.25... :/

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Messages in current thread:

Re: [PATCH] writeback: avoid possible balance_dirty_pages() ..., Fengguang Wu, (Tue Oct 2, 9:27 am)

Re: [PATCH] writeback: avoid possible balance_dirty_pages() ..., Chuck Ebbert, (Tue Oct 2, 2:35 pm)

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