Date: Tue, 5 Jun 2012 00:42:57 +0200 From: Giovanni Trematerra <giovanni.trematerra@gmail.com> To: Konstantin Belousov <kostikbel@gmail.com> Cc: Alan Cox <alc@rice.edu>, Alexander Kabaev <kan@freebsd.org>, Attilio Rao <attilio@freebsd.org>, freebsd-arch@freebsd.org Subject: Re: Fwd: [RFC] Kernel shared variables Message-ID: <CACfq0932i9sKzwcjkZ2DoWqCcmh3U_CNK=V6e160iH3_hUH85Q@mail.gmail.com> In-Reply-To: <20120604221202.GG85127@deviant.kiev.zoral.com.ua> References: <CACfq090r1tWhuDkxdSZ24fwafbVKU0yduu1yV2%2BoYo%2BwwT4ipA@mail.gmail.com> <20120603051904.GG2358@deviant.kiev.zoral.com.ua> <20120603184315.T856@besplex.bde.org> <201206041101.57486.jhb@freebsd.org> <20120604181917.GD85127@deviant.kiev.zoral.com.ua> <CACfq0933BwaverZinGvKtErPvdZp%2B4jQRUFQukK9V_QemRsW9g@mail.gmail.com> <20120604221202.GG85127@deviant.kiev.zoral.com.ua>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, Jun 5, 2012 at 12:12 AM, Konstantin Belousov <kostikbel@gmail.com> wrote: > On Mon, Jun 04, 2012 at 11:16:10PM +0200, Giovanni Trematerra wrote: >> On Mon, Jun 4, 2012 at 8:19 PM, Konstantin Belousov <kostikbel@gmail.com= > wrote: >> > On Mon, Jun 04, 2012 at 11:01:57AM -0400, John Baldwin wrote: >> >> On Sunday, June 03, 2012 6:49:27 am Bruce Evans wrote: >> >> > On Sun, 3 Jun 2012, Konstantin Belousov wrote: >> >> >> I think duplicating this logic in userland would just be wasteful. = =A0I have >> >> a private fast gettimeofday() at my current job and it works by expor= ting >> >> the current timehands structure (well, the equivalent) to userland. = =A0The >> >> userland bits then fetch a copy of the details and do the same as bin= time(). >> >> (I move the math (bintime_addx() and the multiply)) out of the loop h= owever. >> > I started yesterday an implementation which uses shared page to export >> > some variant of timehands, and uses auxv to provide the libc with a po= inter >> > to timehands when rdtsc is reasonable. >> > >> > I almost finished both 32bit and 64bit userspace, but there is >> > kernel-side work left. Is your implementation ready or close to be rea= dy >> > for commit ? In other words, should I drop the efforts, or continue ? >> > >> >> Hey wait, What are you doing? >> This is completely unfair. You didn't even review my patch. > I did. I am quite saddened if you did not note that I did reviewed your > patch. > >> I really don't understand your way to completely ignore me and start imp= lement >> yesterday something you didn't care about for more than 3 years. >> It costs me a lot of time and energy and I think I deserve more respect = that >> just be ignored. > > I did not ignored the problem for 3 years. In fact, I did some, IMO > non-trivial development moving the whole issue forward. In particular, I > developed the shared page infrastructure that are currently used (yes, > we already do have properly implemented shared page and sub-allocator > of memory from it). I did some relevant rtld and libc changes, in > particular, libc now have full access and uses auxv. So I consider this > statement as a form of insult. > Really? My apologize if you felt to be insulted. I didn't it on purpose. Honestly I don't think there will be other occasions to hurt your feelings. > > If you want to do full-flesged vdso at once, I will be very much pleasure= d > and probably support this work technically. Thank you for your offer. I'll appreciate it but I'm not going to work on it anymore. -- Gianni
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?CACfq0932i9sKzwcjkZ2DoWqCcmh3U_CNK=V6e160iH3_hUH85Q>