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SubjectRe: [PATCH/RFC] VFS: support parallel updates in the one directory.
On Fri, 25 Feb 2022, Darrick J. Wong wrote:
> On Thu, Feb 24, 2022 at 09:31:28AM -0700, Andreas Dilger wrote:
> > On Feb 23, 2022, at 22:57, NeilBrown <> wrote:
> > >
> > > for i in {1..70}; do ( for j in {1000..8000}; do touch $j; rm -f $j ; done ) & done
> I think you want something faster here, like ln to hardlink an existing
> file into the directory.

And probably written in C too..

> (I am also not a fan of "PAR_UPDATE", since 'par' is already an English
> word that doesn't mean 'parallel'.)

We already have DCACHE_PAR_LOOKUP for parallel lookups in a directory
(though it is really a lock bit and I think should be named as soch).
So it made sense to use DCACHE_PAR_UPDATE for parallel updates.
And then S_PAR_UPDATE for the inode flag to enable this seemed logical.

But I agree that these names are sub-par :-)


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