Messages in this thread | | | Date | Fri, 11 Jun 1999 11:01:20 +0200 | From | Pavel Machek <> | Subject | Re: Documentation fix for 2.2.9+2.3.5 |
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Hi!
> I've been told that the problem is that RAID1 and RAID5 make_request() > use kmalloc() and can therefore deadlock if a swap is needed to complete > the malloc during swapping. > > However, RAID0 does not malloc at all, so I can assume that its not > affected. Can I suggest Pavel's documentation patch then be changed to > specify that its only RAID 1 and 5 that cannot be used for swapping?
Well - as there's no need to use RAID0 (and you knew that), I do not see urgent need for your change. But yes I updated my home tree, and if Linus will not accept the patch, my next tries will go with update similar to yours.
Pavel
> Suggested... > > > @@ -1113,6 +1119,8 @@ ~ you need to change his number to 11 ;-) > Software-RAID mini-HOWTO, available via FTP (user: anonymous) from > ftp://metalab.unc.edu/pub/Linux/docs/HOWTO/mini. There you will also > learn where to get the supporting user space utilities raidtools. > + > + It is very bad idea to swap onto a RAID 1 or 5 device. Swapping over > + RAID 0 does work, however it may be easier to just add seperate swap > + partitions with equal priorities and let the kernel handle the > + balancing. > > If unsure, say N.
-- I'm really pavel@ucw.cz. Look at http://195.113.31.123/~pavel. Pavel Hi! I'm a .signature virus! Copy me into your ~/.signature, please!
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