Re: [RFC PATCH v2] xfs: run blockgc on freeze to avoid iget stalls after reclaim

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On Thu, Feb 01, 2024 at 12:16:03PM +1100, Dave Chinner wrote:
> On Mon, Jan 29, 2024 at 10:02:16AM -0500, Brian Foster wrote:
> > On Fri, Jan 26, 2024 at 10:46:12AM +1100, Dave Chinner wrote:
> > > On Thu, Jan 25, 2024 at 07:46:55AM -0500, Brian Foster wrote:
> > > > On Mon, Jan 22, 2024 at 02:23:44PM +1100, Dave Chinner wrote:
> > > > > On Fri, Jan 19, 2024 at 02:36:45PM -0500, Brian Foster wrote:
...
> Here's the fixes for the iget vs inactive vs freeze problems in the
> upstream kernel:
> 
> https://lore.kernel.org/linux-xfs/20240201005217.1011010-1-david@xxxxxxxxxxxxx/T/#t
> 
> With that sorted, are there any other issues we know about that
> running a blockgc scan during freeze might work around?
> 

The primary motivation for the scan patch was the downstream/stable
deadlock issue. The reason I posted it upstream is because when I
considered the overall behavior change, I thought it uniformly
beneficial to both contexts based on the (minor) benefits of the side
effects of the scan. You don't need me to enumerate them, and none of
them are uniquely important or worth overanalyzing.

The only real question that matters here is do you agree with the
general reasoning for a blockgc scan during freeze, or shall I drop the
patch?

Brian

> -Dave.
> -- 
> Dave Chinner
> david@xxxxxxxxxxxxx
> 





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