[elrepo] Announcement: EL7 New kernel-ml Release [4.5.0-1]

[Orion Poplawski]

On 03/14/2016 09:48 PM, Nathan Williams wrote:
> Does anyone know if the kernel-ml package for EL7 would be affected by
> the issue described here: http://jwboyer.livejournal.com/52090.html ? I
> know we're running an older xfsprogs from CentOS base with kernel-ml,
> and lately we've seen an uptick in reported fs corruption on some
> systems that get rebooted regularly. I'm not sure how to check the
> xfsprogs package as shipped against the crc checking, but from what I'm
> able to gather, I'm guessing this is an affected combination of software?


I don't think anyone will hit this unless they are using an updated 
xfsprogs or have explicitly enabled crc.  The shipped xfsprogs is 3.2.2 
which does not enable crc checking on file systems by default.  E.g.:

# xfs_info /
meta-data=/dev/sda7              isize=256    agcount=4, agsize=4874176 blks
          =                       sectsz=512   attr=2, projid32bit=1
          =                       crc=0        finobt=0
data     =                       bsize=4096   blocks=19496704, imaxpct=25
          =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=0
log      =internal               bsize=4096   blocks=9519, version=2
          =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0

Notice the crc=0.

If someone has enabled crc=1, then yes I imagine they could run into this.

-- 
Orion Poplawski
Technical Manager                     303-415-9701 x222
NWRA/CoRA Division                    FAX: 303-415-9702
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