Hence why I said I/O errors on *write*. If the block dev layer reports
an error to the VM on page-out, it knows the data hasn't been correctly
written.
I'm not sure zram actually allocates the whole amount of memory it's
configured to use, initially:
steved@xubuntu:~$ free
total used free sharedbuffers cached
Mem: 20507961473456 577340 0 254232 696144
-/+ buffers/cache: 5230801527716
Swap: 2975088 208482954240
steved@xubuntu:~$ swapon -s
FilenameTypeSizeUsed Priority
/dev/zram0 partition 1025396 20848 100
/dev/mapper/lvg2-swap partition 1949692 0 -1
At the very least, free seems to know it's cache memory. Don't know
whether that's merely a presentation thing, need to look at the code.
Anyway, the SNR here is getting awful, and I don't want to contribute to
it. Anyone who wants to can contact me privately via LP.
S.
On Fri, Oct 04, 2013 at 03:28:18PM -, Kenneth Parker wrote:
Mel, the reason I do NOT believe this is a duplicate of # 1215513 is
that many get error messages (including I/O errors in some cases)
WITHOUT a hang. But any time I see I/O error on any disk, whether
hardware, ram or simulated [i.e. network], there's a chance of data
corruption, even without crashes. Please reconsider.
Steve, you also mention I/O error messages. Once again, that could
corrupt data, the WORST TYPE of error, in my NOT SO humble opinion.
(Think about it: If SWAP data comes back in, and your bank balance
changes from 5000 to 500,000, you might THINK you have more in your
account than you do, causing mishaps in International Finance.
[Example used, due to how badly your life could be hurt].
My personal solution is to come up with ONLY a Root Text console [yes,
Ubuntu users aren't SUPPOSED to become real Root, but I've been doing
this sort of thing since the 1990's], rmmod zram [with prejudice, if
possible], and I'm prepared to do a permanent rename of the correct
name of the module, as soon as I get around to it. [Visions of Round
Tuits...]
A point I made earlier: Even if a SWAP partition is NOT made out of
/dev/zram0, part of RAM is being reserved for nothing.
Thank you and best regards,
Kenneth Parker, Seattle, WA
--
You received this bug notification because you are subscribed to the bug
report.
https://bugs.launchpad.net/bugs/1217189
Title:
Buffer I/O error on device zram0
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217189/+subscriptions
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1217189
Title:
Buffer I/O error on device zram0
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217189/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
