Messages in this thread | | | Date | Tue, 11 Feb 2003 13:07:14 +1300 | From | Nigel Cunningham <> | Subject | Re: extra PG_* bits for page->flags |
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On Tue, 2003-02-11 at 12:12, Andrew Morton wrote: > David Howells <dhowells@redhat.com> wrote: > > (*) PG_journal > > (*) PG_journalmark > > Well. If you new fs goes in then yes, we can spare those bits (just).
May I ask, how many bits do you consider available? swsusp beta 18 (ie 2.4), which I'm beginning to port to 2.5, uses 4 bits during suspend & resume for various purposes. If I understand the code correctly, the zone flags use bits 24-31 (although there has been that thread saying they could use less bits). I see in the 2.5.60 patch bit 19 is now in use. Should I be using private, temporarily allocated bitmaps instead of the page flags, to ease the pressure? (Especially since the suspend code is not used in 'normal' operation anyway).
Regards,
Nigel
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