В Tue, 1 Jul 2014 13:53:49 +0200 Valentin Dornauer <valen...@unimplemented.org> пишет:
> Hi! > Attached is another patch from our internal repository. I am not > certain that it will work under any circumstances and it has only > been tested on x86 hardware, so please use with care! > > We had some very annoying issues with quick consecutive reboots, > as GRUB would reuse the same TCP port number without properly closing > the connection (especially when a boot fails). The remote host > (Apache web server) would then discard the new connection and booting > from HTTP would fail. > > > I've included excerpts from the original commit message to further > clarify the problem: > > Even if a grub boot succeeds, the TCP connection for the last > HTTP request stays in state LAST_ACK for some reason. If the > next reboot happens before the web server discards that connection, > this will lead to the server not responding to the new SYN on > the same port number. > > Make the initial port number depend on the RTC time. Increase > it by 80 for every second, wrapping around after 512 seconds. > The 80 is used because grub opens around 3 connections for every > file. Use & 511 instead of modulo because of linking problems. > > Original patch by Stefan Fritsch <frit...@genua.de>. > > - Valentin > May be you can simply use grub_get_time_ms()? After all, we are not interested in exact time, just in some pseudo-random distribution. It should have less overhead than grub_get_datetime().
signature.asc
Description: PGP signature
_______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
