Hi Sven, On Fri, Apr 26, 2013 at 4:15 AM, Sven Van Caekenberghe <s...@stfx.eu> wrote:
> > On 26 Apr 2013, at 12:44, Igor Stasenko <siguc...@gmail.com> wrote: > > > On 26 April 2013 10:27, Pavel Krivanek <pavel.kriva...@gmail.com> wrote: > >> The reason is in the optimalizations in the latest glibc. It really > does not > >> write the new content to the changes file immediately. We need to call > flush > >> at the end of nextChunkPut: > >> > > This is nasty one. > > What i worry that it affects much more than code working with .changes > file. > > Why ? Isn't that standard behavior/semantics: unless you flush you cannot > be sure anything is actually out of the OS' buffers. And even then, disks > and RAID cards are known to lie and sometimes don't write data out even > when flush is called. > But the issue is whether the read is through the same file pointer as the write or not. If the read is made through the same file pointer (or a dup'ed file pointer) then the data should be in the buffer and the read should see it, and if so, then this is a bug in either glibc (if the FILE * info is not properly synchronised) or (unlikely) the kernel. If it is through a separate file pointer then yes, the problem is a missing flush. Which is it? > In networking (TCP streams) this is similar. > > >> Cheers, > >> -- Pavel > >> > >> > >> On Fri, Apr 26, 2013 at 9:57 AM, GOUBIER Thierry < > thierry.goub...@cea.fr> > >> wrote: > >>> > >>> Reproduced on Ubuntu 13.04. > >>> > >>> Class organization remoteString filePositionHi is past the end of the > >>> changes file (i.e. exactly equal to the file size if the comment is > the last > >>> operation). > >>> > >>> Thierry > >>> ________________________________ > >>> De : pharo-project-boun...@lists.gforge.inria.fr > >>> [pharo-project-boun...@lists.gforge.inria.fr] de la part de Pavel > Krivanek > >>> [pavel.kriva...@gmail.com] > >>> Date d'envoi : jeudi 25 avril 2013 21:32 > >>> À : Pharo-project@lists.gforge.inria.fr > >>> Objet : Re: [Pharo-project] cannot modify class comments on Linux > >>> > >>> Jaroslav wrote this: > >>> This does work on F17, but it doesn't work on F18, F19. Maybe glibc > issue? > >>> I guess the reproducer needs glibc-2.16 and up, IMHO 12.04 has 2.15 > same > >>> as F17, so I guess this would be also reproducible on Ubuntu 13.04. > >>> > >>> -- Pavel > >>> > >>> On Thu, Apr 25, 2013 at 11:16 AM, Gisela Decuzzi < > giseladecu...@gmail.com> > >>> wrote: > >>>> > >>>> I'm on 64-bit Ubuntu 12.04 > >>>> > >>>> > >>>> 2013/4/25 Pavel Krivanek <pavel.kriva...@gmail.com> > >>>>> > >>>>> Hi, > >>>>> > >>>>> what architecture and distro do you use because I tried it on a > 32-bit > >>>>> Debian and it worked. I'm on 64-bit Fedora 18. That may be the > reason why > >>>>> the tests are not failing on CI. This error appears on all old system > >>>>> classes and on newely created classes too. > >>>>> Some next info: https://bugzilla.redhat.com/show_bug.cgi?id=956376 > >>>>> > >>>>> -- Pavel > >>>>> > >>>>> On Thu, Apr 25, 2013 at 10:58 AM, Gisela Decuzzi > >>>>> <giseladecu...@gmail.com> wrote: > >>>>>> > >>>>>> Hi Pavel, I tried in Pharo 2.0 and 3.0 and it work well for me. > (just > >>>>>> try in a random class comment) > >>>>>> Are you trying to modify a particular class comment? > >>>>>> > >>>>>> > >>>>>> 2013/4/25 Pavel Krivanek <pavel.kriva...@gmail.com> > >>>>>>> > >>>>>>> Hi, > >>>>>>> > >>>>>>> if you will try to modify a class comment on Linux, the error > >>>>>>> "RemoteString past end of file" will appear. On windows VM it > seems to work > >>>>>>> well. Can someone confirm this behavior on Linux. Squeak has the > same > >>>>>>> problem. > >>>>>>> > >>>>>>> Cheers, > >>>>>>> -- Pavel > >>>>>> > >>>>>> > >>>>> > >>>> > >>> > >> > > > > > > > > -- > > Best regards, > > Igor Stasenko. > > > > > -- best, Eliot
