Re: SMR drive test 2; 128GB partition; no obvious corruption, much more sane behaviour, weird overprovisioning

[Marc Lehmann <schmorp@schmorp.de>]

On Fri, Sep 25, 2015 at 04:05:48PM +0800, Chao Yu <chao2.yu@samsung.com> wrote:
> Actually, we should set the value of 'count' parameter to indicate how many
> times we want to do gc in one batch, at most 16 times in a loop for each
> ioctl invoking:
>         ioctl(fd, F2FS_IOC_GC, &count);
> After ioctl retruned successfully, 'count' parameter will contain the count
> of gces we did actually.

Ah, so this way, I could even find out when to stop.

> One batch means a certain number of gces excuting serially.

Thanks for the explanation - well, I guess there is no harm in setting
count to 1 and calling it repeatedly, as GC operations should generally be
slow enough so many repeated calls will be ok.

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