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Re: [Qemu-devel] [PATCH v3 6/6] qemu_calculate_timeout: increase minimum
From: |
Paul Brook |
Subject: |
Re: [Qemu-devel] [PATCH v3 6/6] qemu_calculate_timeout: increase minimum timeout to 1h |
Date: |
Fri, 10 Feb 2012 11:09:02 +0000 |
User-agent: |
KMail/1.13.7 (Linux/3.1.0-1-amd64; KDE/4.6.5; x86_64; ; ) |
> >> > At least the floppy DMA engine is fine with it, it uses idle bottom
> >> > halves (which are a hack and could be replaced by timers, but that's
> >> > not relevant now).
> >
> > I thought idle bottom halves were one of the things that made this timout
> > necessary. How else are they going to get run?
>
> The timeout is reduced to 10 ms when an idle bottom half is scheduled.
> See qemu_bh_update_timeout in async.c.
Ah, I see. Idle BH are indeed a nasty hack that should be removed, but not
directly relevant to this 1s timeout.
I don't think this changes my overall conlusion: Either we need this timeout
to poll below the user-thinks-qemu-died threshold, or we should be blocking
indefinitely.
Paul
- Re: [Qemu-devel] [PATCH v3 6/6] qemu_calculate_timeout: increase minimum timeout to 1h, Paul Brook, 2012/02/09
- Re: [Qemu-devel] [PATCH v3 6/6] qemu_calculate_timeout: increase minimum timeout to 1h, Paolo Bonzini, 2012/02/10
- Re: [Qemu-devel] [PATCH v3 6/6] qemu_calculate_timeout: increase minimum timeout to 1h, Paul Brook, 2012/02/10
- Re: [Qemu-devel] [PATCH v3 6/6] qemu_calculate_timeout: increase minimum timeout to 1h, Paolo Bonzini, 2012/02/10
- Re: [Qemu-devel] [PATCH v3 6/6] qemu_calculate_timeout: increase minimum timeout to 1h,
Paul Brook <=
- Re: [Qemu-devel] [PATCH v3 6/6] qemu_calculate_timeout: increase minimum timeout to 1h, Stefano Stabellini, 2012/02/10
- Re: [Qemu-devel] [PATCH v3 6/6] qemu_calculate_timeout: increase minimum timeout to 1h, Paolo Bonzini, 2012/02/10
- Re: [Qemu-devel] [PATCH v3 6/6] qemu_calculate_timeout: increase minimum timeout to 1h, Jan Kiszka, 2012/02/10
- Re: [Qemu-devel] [PATCH v3 6/6] qemu_calculate_timeout: increase minimum timeout to 1h, Stefano Stabellini, 2012/02/10
- Re: [Qemu-devel] [PATCH v3 6/6] qemu_calculate_timeout: increase minimum timeout to 1h, Paul Brook, 2012/02/10
- Re: [Qemu-devel] [PATCH v3 6/6] qemu_calculate_timeout: increase minimum timeout to 1h, Stefano Stabellini, 2012/02/13
- Re: [Qemu-devel] [PATCH v3 6/6] qemu_calculate_timeout: increase minimum timeout to 1h, Paul Brook, 2012/02/14
- Re: [Qemu-devel] [PATCH v3 6/6] qemu_calculate_timeout: increase minimum timeout to 1h, Stefano Stabellini, 2012/02/14