[TUHS] signals and blocked in I/O

Warner Losh imp at bsdimp.com
Tue Dec 5 08:56:22 AEST 2017

Pages are pages. The filesystem handles the details for the offset of each
one. There's no contiguous on disk requirement.


On Mon, Dec 4, 2017 at 3:54 PM, Ron Natalie <ron at ronnatalie.com> wrote:

> Nothing says a page has to be loaded in one DMA.    The swap file isn't
> allocated any different than any other file on the LINUX systems.    About
> the only thing you have to do is make
> sure that all the blocks are populated.    UNIX normally allocates the
> files
> as sparse and the swap code doesn't want to have to worry about allocating
> blocks when it comes to paging out.
> -----Original Message-----
> From: TUHS [mailto:tuhs-bounces at minnie.tuhs.org] On Behalf Of Dave
> Horsfall
> Sent: Monday, December 4, 2017 5:07 PM
> To: The Eunuchs Hysterical Society
> Subject: Re: [TUHS] signals and blocked in I/O
> On Mon, 4 Dec 2017, arnold at skeeve.com wrote:
> > Most modern systems let you use a regular old file in the filesystem
> > for swap space, instead of having to repartition your disk and using a
> > dedicated partition. I'd be suprised if your *BSD box didn't let you
> > do that too.  It's a little slower, but a gazillion times more
> convenient.
> Doesn't it have to be a contiguous file (for DMA), or is scatter/gather now
> supported?
> --
> Dave Horsfall DTM (VK2KFU)  "Those who don't understand security will
> suffer."
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