Messages in this thread Patch in this message | | | Date | Wed, 21 Sep 2005 10:39:01 -0700 | From | Jay Lan <> | Subject | Re: [PATCH 2.6.14-rc2] fix incorrect mm->hiwater_vm and mm->hiwater_rss |
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Christoph Lameter wrote: > On Wed, 21 Sep 2005, Jay Lan wrote: > > >>>5. Please add appropriate CONFIG, dummy macros etc., so that no time >>> is wasted on these updates in all the vanilla systems which have no >>> interest in them - but maybe Christoph already has that well in hand. >> >>It is used in enhanced system accounting. An obvious CONFIG would be >>CONFIG_BSD_PROCESS_ACCT. > > > Right. Make all the data fields and code dependent on an appropriate > CONFIG_XXX macro. We talked about that a couple of weeks ago as AFAIK. > > I had a look at Frank's patch and it does not seem to touch the critical > paths. Jay: Can you verify that the changes do not affect critical paths > and that accounting is still working in the right way?
Frank's patch looks fine to me except one place: diff -ru a/mm/mmap.c b/mm/mmap.c --- a/mm/mmap.c 2005-09-21 11:07:40.000000000 +0200 +++ b/mm/mmap.c 2005-09-21 11:17:06.755572000 +0200 @@ -854,6 +854,7 @@ mm->stack_vm += pages; if (flags & (VM_RESERVED|VM_IO)) mm->reserved_vm += pages; + update_mem_hiwater(mm); } #endif /* CONFIG_PROC_FS */
I have a question of adding this call here. 'update_mem_hiwater' does nothing unless mm->total_vm or rss gets updated. I do not see total_vm get updates in __vm_stat_account()? - jay
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