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Groups > linux.kernel > #1418399
| From | David Howells <dhowells@redhat.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [RFC 10/12] x86, rwsem: simplify __down_write |
| Date | 2016-06-09 16:50 +0200 |
| Message-ID | <rI9rs-7FY-13@gated-at.bofh.it> (permalink) |
| References | (1 earlier) <qXPKi-8sh-3@gated-at.bofh.it> <qXPKj-8sh-35@gated-at.bofh.it> <qY0Po-7NH-11@gated-at.bofh.it> <rFZZf-5w1-7@gated-at.bofh.it> <rG5UZ-Ei-13@gated-at.bofh.it> |
| Organization | Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 |
Peter Zijlstra <peterz@infradead.org> wrote: > Blergh; so looking at more asm there's still a few tricks we cannot do. > So while overall size is down, some paths do end up more expensive. (It > typically boils down to creative use of condition flags, which is very > hard in C) It can be done using ISO __atomic_fetch_add() and suchlike. David
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Re: [RFC 10/12] x86, rwsem: simplify __down_write Peter Zijlstra <peterz@infradead.org> - 2016-06-03 18:20 +0200
Re: [RFC 10/12] x86, rwsem: simplify __down_write Peter Zijlstra <peterz@infradead.org> - 2016-06-04 00:40 +0200
Re: [RFC 10/12] x86, rwsem: simplify __down_write David Howells <dhowells@redhat.com> - 2016-06-09 16:50 +0200
Re: [RFC 10/12] x86, rwsem: simplify __down_write Peter Zijlstra <peterz@infradead.org> - 2016-06-09 19:40 +0200
Re: [RFC 10/12] x86, rwsem: simplify __down_write "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-06-10 20:00 +0200
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