linux-kernel - Re: [PATCH] x86_64: fix delayed signals

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Message-ID: <20080711155306.3153e0a1@infradead.org>
Date:	Fri, 11 Jul 2008 15:53:06 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Roland McGrath <roland@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Elias Oltmanns <eo@...ensachen.de>,
	Török Edwin <edwintorok@...il.com>
Subject: Re: [PATCH] x86_64: fix delayed signals

On Fri, 11 Jul 2008 11:31:26 -0700 (PDT)
Linus Torvalds <torvalds@...ux-foundation.org> wrote:

> 
> 
> On Fri, 11 Jul 2008, Linus Torvalds wrote:
> > 
> > Btw, did any of the impacted people test -rc9? Edwin's report is
> > about -rc2 and -rc8, and one of the things we fixed since -rc8 is
> > that incorrect and unintentional nr_zones zeroing that effectively
> > disabled kswapd - and made everybody do synchronous memory freeing
> > when they wanted to allocate more memory.. That can play havoc with
> > any interactive stuff.
> 
> Hmm. Edwin's latencytop output includes this (ignoring the _very_ top 
> entries that are all either CD-ROM media change tests or are
> interruptible pipe/select things) at the top:
> 
> 	21 10264428 915514 get_request_wait __make_request
> generic_make_request submit_bio xfs_submit_ioend_bio xfs_submit_ioend 
> 		xfs_page_state_convert xfs_vm_writepage __writepage 
> 		write_cache_pages generic_writepages xfs_vm_writepages


argh. well I guess this might be useful for this case, but normally
latencytop gives you much more humanly readable data... maybe Edwin
forgot to do "make install" :-(
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