Messages in this thread | | | Date | Mon, 17 May 2004 21:16:30 +0100 (BST) | From | Hugh Dickins <> | Subject | Re: ~500 megs cached yet 2.6.5 goes into swap hell |
| |
On Wed, 12 May 2004, Rob Landley wrote: > On Friday 07 May 2004 11:57, Pavel Machek wrote: > > Hi! > > > > > > Perhaps what we really want is "swap_back_in" script? That way you > > > > could do "updatedb; swap_back_in" in cron and be happy. > > > > > > swapoff -a; swapon -a > > > > Good point... it will not bring back executable pages, through. > > > > Pavel > > What would the above do if there wasn't enough memory to swap everything back > in? (Presumably, the swapoff would fail?)
Repeating my earlier reply to a similar question...
On 2.4 it certainly would be a problem (hang with others OOM-killed).
On 2.6 it shouldn't be a problem: the swapoff may fail upfront if there's way too little memory, or it may get itself OOM-killed if it runs out on the way, but it ought not to upset other tasks.
But of course, Pavel is right that it does nothing for file backed.
Hugh
- 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/
| |