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Date: Mon, 14 Apr 2008 14:21:27 +0200 From: "Michael Kerrisk" <mtk.manpages@...glemail.com> To: "Erik Bosman" <ejbosman@...vu.nl> Cc: "Michael Kerrisk" <mtk.manpages@...il.com>, "Andrew Morton" <akpm@...ux-foundation.org>, "Thomas Gleixner" <tglx@...utronix.de>, "Ingo Molnar" <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com>, "Andrea Arcangeli" <andrea@...share.com>, "Linus Torvalds" <torvalds@...ux-foundation.org>, linux-kernel@...r.kernel.org, "Arjan van de Ven" <arjan@...radead.org> Subject: Re: [PATCH 2/3] x86: Implement prctl PR_GET_TSC and PR_SET_TSC On Mon, Apr 14, 2008 at 1:59 PM, Erik Bosman <ejbosman@...vu.nl> wrote: > > > > On Mon, 14 Apr 2008, Michael Kerrisk wrote: > > > Erik, > > > > Could you CC me please on kernel-userland API changes. > > > > Also it would be helpful if you could provide a short paragraph > > (plaintext is fine) that describes the new commands and would be > > suitable for inclusion in the prctl.2 ( > > http://www.kernel.org/doc/man-pages/online/pages/man2/prctl.2.html ) > > man page -- would that be possible? > > > > Cheers, > > > > Michael > > > > .TP > .B PR_SET_TSC > (Since Linux 2.6.??, only on x86) > Set the state of the flag determining whether the timestamp counter > can be read by the process. Pass > \fBPR_TSC_ENABLE\fP to \fIarg2\fP to allow it to be read, or > \fBPR_TSC_SIGSEGV\fP to generate a \fBSIGSEGV\fP when the process tries > to read the timestamp counter. > .TP > .B PR_GET_TSC > (Since Linux 2.6.??, only on x86) > Get the state of the flag determining whether the timestamp counter > can be read from \fIarg2\fP. Thanks Erik. Looks good as a first cut -- I may come back to you with questions. It sounds like this might go into mainline in 2.6.26, is that right? Cheers, Michael -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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