Re: Wait free LW_SHARED acquisition - v0.2

Hi,

On 2014-01-28 21:27:29 -0800, Peter Geoghegan wrote:
> On Fri, Nov 15, 2013 at 11:47 AM, Andres Freund <andres@2ndquadrant.com> wrote:
> > 1) I've added an abstracted atomic ops implementation. Needs a fair
> >    amount of work, also submitted as a separate CF entry. (Patch 1 & 2)
> 
> Commit 220b34331f77effdb46798ddd7cca0cffc1b2858 caused bitrot when
> applying 0002-Very-basic-atomic-ops-implementation.patch. Please
> rebase.

I've pushed a rebased version of the patchset to
http://git.postgresql.org/gitweb/?p=users/andresfreund/postgres.git
branch rwlock contention.
220b34331f77effdb46798ddd7cca0cffc1b2858 actually was the small problem,
ea9df812d8502fff74e7bc37d61bdc7d66d77a7f was the major PITA.

I plan to split the atomics patch into smaller chunks before
reposting. Imo the "Convert the PGPROC->lwWaitLink list into a dlist
instead of open coding it." is worth being applied independently from
the rest of the series, it simplies code and it fixes a bug...

Greetings,

Andres Freund

-- Andres Freund                       http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training &
Services