[lkml]   [2001]   [Apr]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] SMP race in ext2 - metadata corruption.
On Fri, Apr 27, 2001 at 09:23:57AM -0400, you [Alexander Viro] claimed:
> On Fri, 27 Apr 2001, Vojtech Pavlik wrote:
> > Actually this is done quite often, even on mounted fs's:
> >
> > hdparm -t /dev/hda
> You would need either hdparm -t /dev/hda<something> or mounting the
> whole /dev/hda.
> Buffer cache for the disk is unrelated to buffer cache for parititions.

Well, I for one have been running

hdparm -t /dev/md0
time head -c 1000m /dev/md0 > /dev/null
while /dev/md0 was mounted without realizing that this could be "stupid" or
that it could eat my data.

/dev/md0 on /backup-versioned type ext2 (rw)

I often cat(1) or head(1) partitions or devices (even mounted ones) if I
need dummy randomish test data for compression or tape drives (that I've
been having trouble with).

BTW: is 2.2 affected? 2.0?

-- v --
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 12:52    [from the cache]
©2003-2014 Jasper Spaans. hosted at Digital Ocean