-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 The Wednesday 2007-12-05 at 22:35 +0100, jdd wrote:
Carlos E. R. wrote:
If swap is a major issue you've clearly not got enough RAM ;)
Swap is not a major issue; I didn't say that. What we are saying is that loss of swap when there is something swapped IS a major issue.
what this remark may me think is this: is the swap really identical to ram (functionally, of course, ne speed involved).
Mmm...!
if so, is the ram more important (or less) than Hard drive? Is the ram loss more problematic? Is it more prone to happen? what do you do is your memory chip fails?
Ram loss will probably panic the kernel instantly. Worse, not only it can corrupt programs and data in memory, it can also corrupt disk data which is buffered in memory and written to disk... (it is worse for filesystems like xfs). So, the traditional response to a ram failure has been to panic and halt the computer immediately. I'm not sure what linux does, though. Typically, PCs ram was 9 bit wide: 8 bit for data, one for parity. A parity error, crash! I think there was (is?) an IRQ dedicated to this condition. Some memory modules did not have this extra bit and were thus cheaper. But you can use more bits per byte and use error correction codes to recover 1 bit error (or more) and continue working. Also, the cpu could map out a section that's known to be bad or failing. - -- Cheers, Carlos E. R. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4-svn0 (GNU/Linux) iD8DBQFHVz9QtTMYHG2NR9URAocMAJsF7te3Rz3c+57a7FO6pfHrDTpVOwCfRZ7v JtoOtsUtv29b+kr017UTz3s= =DfJh -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org