lkml.org 
[lkml]   [2001]   [May]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH] SMP race in ext2 - metadata corruption.


On Thu, 26 Apr 2001, Linus Torvalds wrote:

>
>
> On Thu, 26 Apr 2001, Alexander Viro wrote:
> > On Thu, 26 Apr 2001, Andrea Arcangeli wrote:
> > >
> > > how can the read in progress see a branch that we didn't spliced yet? We
> >
> > fd = open("/dev/hda1", O_RDONLY);
> > read(fd, buf, sizeof(buf));
>
> Note that I think all these arguments are fairly bogus. Doing things like
> "dump" on a live filesystem is stupid and dangerous (in my opinion it is
> stupid and dangerous to use "dump" at _all_, but that's a whole 'nother
> discussion in itself), and there really are no valid uses for opening a
> block device that is already mounted. More importantly, I don't think
> anybody actually does.

Actually I did. I might do it again :) The point was to get the kernel to
cache certain blocks in the RAM.

Vladimir Dergachev

>
> The fact that you _can_ do so makes the patch valid, and I do agree with
> Al on the "least surprise" issue. I've already applied the patch, in fact.
> But the fact is that nobody should ever do the thing that could cause
> problems.
>
> Linus
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
>

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 12:52    [W:0.170 / U:0.148 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site