Date: Thu, 8 Apr 2004 23:59:48 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: freebsd-arch@freebsd.org Subject: Re: mtx_lock_recurse/mtx_unlock_recurse functions (proof-of-concept). Message-ID: <20040408215948.GM661@darkness.comp.waw.pl> In-Reply-To: <29212.1081460407@critter.freebsd.dk> References: <20040408213647.GL661@darkness.comp.waw.pl> <29212.1081460407@critter.freebsd.dk>
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[-- Attachment #1 --] On Thu, Apr 08, 2004 at 11:40:07PM +0200, Poul-Henning Kamp wrote: +> >As was discussed, it will be helpful to have functions, that are able +> >to acquire lock recursively, even if lock itself isn't recursable. +> +> Sounds evil to me... Why? I don't think that better is to just use MTX_RECURSE if we don't need it in 90% of cases. And sometimes it is really hard to pass information if lock is held or not, just like for that rwatson's kqueue thing. +> Does your patch also make witness aware of this ? Nope, it is just a proof-of-concept and as jhb@ pointed out, we want to keep our interface simple, so it probably will never reach the tree. -- Pawel Jakub Dawidek http://www.FreeBSD.org pjd@FreeBSD.org http://garage.freebsd.pl FreeBSD committer Am I Evil? Yes, I Am! [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQFAdctUForvXbEpPzQRArClAKCklcqQo6dXRn9oj0oes8DYHaKsrwCeL3fM COlYy2Qa3ZsI7+jWGksYYFc= =Ada8 -----END PGP SIGNATURE-----home | help
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