Re: PR/40027 CVS commit: src/sys/uvm

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

The following reply was made to PR kern/40027; it has been noted by GNATS.

From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: ad%NetBSD.org@localhost, gnats-admin%NetBSD.org@localhost, 
netbsd-bugs%NetBSD.org@localhost
Subject: Re: PR/40027 CVS commit: src/sys/uvm
Date: Thu, 18 Dec 2008 21:32:05 +0100

 On Sat, Dec 13, 2008 at 12:55:01PM +0000, Andrew Doran wrote:
 > [...]
 >  On Sat, Dec 13, 2008 at 11:26:57AM +0000, Andrew Doran wrote:
 >  > 
 >  > Module Name:      src
 >  > Committed By:     ad
 >  > Date:             Sat Dec 13 11:26:57 UTC 2008
 >  > 
 >  > Modified Files:
 >  >   src/sys/uvm: uvm_pdaemon.c
 >  > 
 >  > Log Message:
 >  > PR 40027/pagedaemon loops on memory shortage
 >  > 
 >  > uvmpd_scan_queue:
 >  > 
 >  > - Fix a bug that prevented the pagedaemon from making forward progress
 >  >   if (a) swap was full (b) the first 16 pages on the inactive list were
 >  >   unbusy anons not already backed by swap.
 >  > 
 >  > - Remove redundant uvm_swapisfull() check and just try to allocate a slot.
 >  >   If it fails we know swap is full.
 
 With an up to date kernel I can't reproduce this problem any more.
 With a loop running the test program, while a tar is running in parallel
 filling up the file cache, the test system survived 20mn (it hangs in
 less than a minute on netbsd-5).
 thanks !
 
 Now seeing how it behaves with a pbulk build ...
 
 -- 
 Manuel Bouyer <bouyer%antioche.eu.org@localhost>
      NetBSD: 26 ans d'experience feront toujours la difference
 --