Re: [PATCH 03/19] btrfs: keep track of which extents have been discarded

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On Tue, Oct 15, 2019 at 02:17:55PM +0200, David Sterba wrote:
> On Mon, Oct 07, 2019 at 04:17:34PM -0400, Dennis Zhou wrote:
> > @@ -2165,6 +2173,7 @@ static bool try_merge_free_space(struct btrfs_free_space_ctl *ctl,
> >  	bool merged = false;
> >  	u64 offset = info->offset;
> >  	u64 bytes = info->bytes;
> > +	bool is_trimmed = btrfs_free_space_trimmed(info);
> 
> Please add a const in such cases. I've been doing that in other patches
> but as more iterations are expected, let's have it there from the
> beginning.
> 

Done.

> > --- a/fs/btrfs/free-space-cache.h
> > +++ b/fs/btrfs/free-space-cache.h
> > @@ -6,6 +6,8 @@
> >  #ifndef BTRFS_FREE_SPACE_CACHE_H
> >  #define BTRFS_FREE_SPACE_CACHE_H
> >  
> > +#define BTRFS_FSC_TRIMMED		(1UL << 0)
> 
> Please add a comment

I've switched this to an enum and added a comment above it.

Thanks,
Dennis



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