On May 13, 2013 9:50 AM, "Gregory Farnum" <greg@xxxxxxxxxxx> wrote:
>
> On Mon, May 13, 2013 at 6:13 AM, Lenon Join <joinlenon@xxxxxxxxx> wrote:
> > Hi all,
> >
> > I am test ceph 0.56.6 with CentOS 6.3
> > I have one server, use raid 6, and then divided into 2 partitions (2 OSD)
> > With CentOS 6.3 (kernel 2.6.32-358), OSDs on the same server frequently
> > error:
> >
> > " ......... osd.x [WRN] slow request x seconds old
> >
> > ....................................................... "
> >
> > I think due to syncfs error.
> >
> > I use command: grep -r syncfs /usr/include
> >
> > Nothing is out
> >
> >
> > With kernel 3.9.0 :
> >
> > grep -r syncfs /usr/include
> >
> > /usr/include/asm-generic/unistd.h:#define __NR_syncfs 267
> > /usr/include/asm-generic/unistd.h:__SYSCALL(__NR_syncfs, sys_syncfs)
> > /usr/include/asm/unistd_32.h:#define __NR_syncfs 344
> > /usr/include/asm/unistd_64.h:#define __NR_syncfs
> > 306
> > /usr/include/asm/unistd_64.h:__SYSCALL(__NR_syncfs, sys_syncfs)
> > /usr/include/bits/syscall.h:#define SYS_syncfs __NR_syncfs
> >
> >
> >
> > Thus, kernel suitable for deployment CEPH ?
> >
> > I need to install glibc or not?
>
> I was under the impression that the 6.3 kernel did include the syncfs
> call but didn't export it via glibc or anything, but maybe I'm
> mistaken. Dan did the detection work for this and might know?
> -Greg
> Software Engineer #42 @ http://inktank.com | http://ceph.com
The daemon log should have info about what was detected. It might not have the symbol in that case in the file, but it should definitely mention it in the log.
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