* Re: linux-next: Tree for May 4 --> mm: free_area_init: allow defining max_zone_pfn in descending order does increase memory use [not found] <20200504173547.2cdd83bf@canb.auug.org.au> @ 2020-05-04 14:50 ` Christian Borntraeger 2020-05-04 15:44 ` Mike Rapoport 0 siblings, 1 reply; 4+ messages in thread From: Christian Borntraeger @ 2020-05-04 14:50 UTC (permalink / raw) To: Stephen Rothwell, Linux Next Mailing List Cc: Linux Kernel Mailing List, Mike Rapoport Mike, commit 51a2f644fd020d5f090044825c388444d11029d ("mm: free_area_init: allow defining max_zone_pfn in descending order") does increase the memory use on s390 (e.g. 700 MB vs.1.8 GB). Something is odd in this patch. Any idea? ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: linux-next: Tree for May 4 --> mm: free_area_init: allow defining max_zone_pfn in descending order does increase memory use 2020-05-04 14:50 ` linux-next: Tree for May 4 --> mm: free_area_init: allow defining max_zone_pfn in descending order does increase memory use Christian Borntraeger @ 2020-05-04 15:44 ` Mike Rapoport 2020-05-04 21:08 ` Stephen Rothwell 0 siblings, 1 reply; 4+ messages in thread From: Mike Rapoport @ 2020-05-04 15:44 UTC (permalink / raw) To: Christian Borntraeger Cc: Stephen Rothwell, Linux Next Mailing List, Linux Kernel Mailing List, Andrew Morton, Marc Hartmayer, linux-s390, Vasily Gorbik, Heiko Carstens Ho Christian, On Mon, May 04, 2020 at 04:50:06PM +0200, Christian Borntraeger wrote: > Mike, > commit 51a2f644fd020d5f090044825c388444d11029d ("mm: free_area_init: allow defining max_zone_pfn in descending order") > does increase the memory use on s390 (e.g. 700 MB vs.1.8 GB). > > Something is odd in this patch. Any idea? Yeah, this patch is buggy. In short, it breaks zone size calculation on s390 and some other architectures. I've just replied at [1] with more details and a fix. [1] https://lore.kernel.org/linux-mm/20200504153901.GM14260@kernel.org/ -- Sincerely yours, Mike. ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: linux-next: Tree for May 4 --> mm: free_area_init: allow defining max_zone_pfn in descending order does increase memory use 2020-05-04 15:44 ` Mike Rapoport @ 2020-05-04 21:08 ` Stephen Rothwell 2020-05-05 9:36 ` Christian Borntraeger 0 siblings, 1 reply; 4+ messages in thread From: Stephen Rothwell @ 2020-05-04 21:08 UTC (permalink / raw) To: Mike Rapoport Cc: Christian Borntraeger, Linux Next Mailing List, Linux Kernel Mailing List, Andrew Morton, Marc Hartmayer, linux-s390, Vasily Gorbik, Heiko Carstens [-- Attachment #1: Type: text/plain, Size: 781 bytes --] Hi Mike, On Mon, 4 May 2020 18:44:10 +0300 Mike Rapoport <rppt@linux.ibm.com> wrote: > > Ho Christian, > > On Mon, May 04, 2020 at 04:50:06PM +0200, Christian Borntraeger wrote: > > Mike, > > commit 51a2f644fd020d5f090044825c388444d11029d ("mm: free_area_init: allow defining max_zone_pfn in descending order") > > does increase the memory use on s390 (e.g. 700 MB vs.1.8 GB). > > > > Something is odd in this patch. Any idea? > > Yeah, this patch is buggy. In short, it breaks zone size calculation on > s390 and some other architectures. > > I've just replied at [1] with more details and a fix. > > [1] https://lore.kernel.org/linux-mm/20200504153901.GM14260@kernel.org/ I have added that to linux-next for today. -- Cheers, Stephen Rothwell [-- Attachment #2: OpenPGP digital signature --] [-- Type: application/pgp-signature, Size: 488 bytes --] ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: linux-next: Tree for May 4 --> mm: free_area_init: allow defining max_zone_pfn in descending order does increase memory use 2020-05-04 21:08 ` Stephen Rothwell @ 2020-05-05 9:36 ` Christian Borntraeger 0 siblings, 0 replies; 4+ messages in thread From: Christian Borntraeger @ 2020-05-05 9:36 UTC (permalink / raw) To: Stephen Rothwell, Mike Rapoport Cc: Linux Next Mailing List, Linux Kernel Mailing List, Andrew Morton, Marc Hartmayer, linux-s390, Vasily Gorbik, Heiko Carstens On 04.05.20 23:08, Stephen Rothwell wrote: > Hi Mike, > > On Mon, 4 May 2020 18:44:10 +0300 Mike Rapoport <rppt@linux.ibm.com> wrote: >> >> Ho Christian, >> >> On Mon, May 04, 2020 at 04:50:06PM +0200, Christian Borntraeger wrote: >>> Mike, >>> commit 51a2f644fd020d5f090044825c388444d11029d ("mm: free_area_init: allow defining max_zone_pfn in descending order") >>> does increase the memory use on s390 (e.g. 700 MB vs.1.8 GB). >>> >>> Something is odd in this patch. Any idea? >> >> Yeah, this patch is buggy. In short, it breaks zone size calculation on >> s390 and some other architectures. >> >> I've just replied at [1] with more details and a fix. >> >> [1] https://lore.kernel.org/linux-mm/20200504153901.GM14260@kernel.org/ > > I have added that to linux-next for today. > Ack, 5.7.0-rc4-next-20200505 seems to work fine. ^ permalink raw reply [flat|nested] 4+ messages in thread
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2020-05-04 14:50 ` linux-next: Tree for May 4 --> mm: free_area_init: allow defining max_zone_pfn in descending order does increase memory use Christian Borntraeger
2020-05-04 15:44 ` Mike Rapoport
2020-05-04 21:08 ` Stephen Rothwell
2020-05-05 9:36 ` Christian Borntraeger
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