Re: [RFC 0/6] zsmalloc support compaction

2014-12-22 Thread Minchan Kim
On Fri, Dec 19, 2014 at 09:46:48AM +0900, Minchan Kim wrote: > Hey Seth, > > On Wed, Dec 17, 2014 at 05:19:30PM -0600, Seth Jennings wrote: > > On Tue, Dec 02, 2014 at 11:49:41AM +0900, Minchan Kim wrote: > > > Recently, there was issue about zsmalloc fragmentation and > > > I got a report from

Re: [RFC 0/6] zsmalloc support compaction

2014-12-22 Thread Minchan Kim
On Fri, Dec 19, 2014 at 09:46:48AM +0900, Minchan Kim wrote: Hey Seth, On Wed, Dec 17, 2014 at 05:19:30PM -0600, Seth Jennings wrote: On Tue, Dec 02, 2014 at 11:49:41AM +0900, Minchan Kim wrote: Recently, there was issue about zsmalloc fragmentation and I got a report from Juno that

Re: [RFC 0/6] zsmalloc support compaction

2014-12-18 Thread Minchan Kim
Hey Seth, On Wed, Dec 17, 2014 at 05:19:30PM -0600, Seth Jennings wrote: > On Tue, Dec 02, 2014 at 11:49:41AM +0900, Minchan Kim wrote: > > Recently, there was issue about zsmalloc fragmentation and > > I got a report from Juno that new fork failed although there > > are plenty of free pages in

Re: [RFC 0/6] zsmalloc support compaction

2014-12-18 Thread Minchan Kim
Hey Seth, On Wed, Dec 17, 2014 at 05:19:30PM -0600, Seth Jennings wrote: On Tue, Dec 02, 2014 at 11:49:41AM +0900, Minchan Kim wrote: Recently, there was issue about zsmalloc fragmentation and I got a report from Juno that new fork failed although there are plenty of free pages in the

Re: [RFC 0/6] zsmalloc support compaction

2014-12-17 Thread Ganesh Mahendran
2014-12-18 7:19 GMT+08:00 Seth Jennings : > On Tue, Dec 02, 2014 at 11:49:41AM +0900, Minchan Kim wrote: >> Recently, there was issue about zsmalloc fragmentation and >> I got a report from Juno that new fork failed although there >> are plenty of free pages in the system. >> His investigation

Re: [RFC 0/6] zsmalloc support compaction

2014-12-17 Thread Seth Jennings
On Tue, Dec 02, 2014 at 11:49:41AM +0900, Minchan Kim wrote: > Recently, there was issue about zsmalloc fragmentation and > I got a report from Juno that new fork failed although there > are plenty of free pages in the system. > His investigation revealed zram is one of the culprit to make > heavy

Re: [RFC 0/6] zsmalloc support compaction

2014-12-17 Thread Seth Jennings
On Tue, Dec 02, 2014 at 11:49:41AM +0900, Minchan Kim wrote: Recently, there was issue about zsmalloc fragmentation and I got a report from Juno that new fork failed although there are plenty of free pages in the system. His investigation revealed zram is one of the culprit to make heavy

Re: [RFC 0/6] zsmalloc support compaction

2014-12-17 Thread Ganesh Mahendran
2014-12-18 7:19 GMT+08:00 Seth Jennings sjenni...@variantweb.net: On Tue, Dec 02, 2014 at 11:49:41AM +0900, Minchan Kim wrote: Recently, there was issue about zsmalloc fragmentation and I got a report from Juno that new fork failed although there are plenty of free pages in the system. His

Re: [RFC 0/6] zsmalloc support compaction

2014-12-03 Thread 박승호/책임연구원/SW Platform(연)AOT팀(seungho1.p...@lge.com)
Hi, Minchan. I got it. Thank u :). Seungho. 2014-12-04 오후 4:20에 Minchan Kim 이(가) 쓴 글: Hey Seungho, On Thu, Dec 04, 2014 at 03:49:21PM +0900, "박승호/책임연구원/SW Platform(연)AOT팀(seungho1.p...@lge.com)" wrote: Hi, Minchan. I have a question. The problem mentioned can't be resolved with

Re: [RFC 0/6] zsmalloc support compaction

2014-12-03 Thread 박승호/책임연구원/SW Platform(연)AOT팀(seungho1.p...@lge.com)
Hi, Minchan. Sorry, I got it. You made zsmalloc pages movable. forget it. Seungho. 2014-12-04 오후 3:49에 "박승호/책임연구원/SW Platform(연)AOT팀 (seungho1.p...@lge.com)" 이(가) 쓴 글: Hi, Minchan. I have a question. The problem mentioned can't be resolved with compaction? Is there any reason that zsmalloc

Re: [RFC 0/6] zsmalloc support compaction

2014-12-03 Thread Minchan Kim
Hey Seungho, On Thu, Dec 04, 2014 at 03:49:21PM +0900, "박승호/책임연구원/SW Platform(연)AOT팀(seungho1.p...@lge.com)" wrote: > Hi, Minchan. > > I have a question. > The problem mentioned can't be resolved with compaction? > Is there any reason that zsmalloc pages can't be moved by compaction > operation

Re: [RFC 0/6] zsmalloc support compaction

2014-12-03 Thread 박승호/책임연구원/SW Platform(연)AOT팀(seungho1.p...@lge.com)
Hi, Minchan. I have a question. The problem mentioned can't be resolved with compaction? Is there any reason that zsmalloc pages can't be moved by compaction operation in direct reclaim? 2014-12-02 오전 11:49에 Minchan Kim 이(가) 쓴 글: Recently, there was issue about zsmalloc fragmentation and I got

Re: [RFC 0/6] zsmalloc support compaction

2014-12-03 Thread 박승호/책임연구원/SW Platform(연)AOT팀(seungho1.p...@lge.com)
Hi, Minchan. I have a question. The problem mentioned can't be resolved with compaction? Is there any reason that zsmalloc pages can't be moved by compaction operation in direct reclaim? 2014-12-02 오전 11:49에 Minchan Kim 이(가) 쓴 글: Recently, there was issue about zsmalloc fragmentation and I got

Re: [RFC 0/6] zsmalloc support compaction

2014-12-03 Thread Minchan Kim
Hey Seungho, On Thu, Dec 04, 2014 at 03:49:21PM +0900, 박승호/책임연구원/SW Platform(연)AOT팀(seungho1.p...@lge.com) wrote: Hi, Minchan. I have a question. The problem mentioned can't be resolved with compaction? Is there any reason that zsmalloc pages can't be moved by compaction operation in

Re: [RFC 0/6] zsmalloc support compaction

2014-12-03 Thread 박승호/책임연구원/SW Platform(연)AOT팀(seungho1.p...@lge.com)
Hi, Minchan. Sorry, I got it. You made zsmalloc pages movable. forget it. Seungho. 2014-12-04 오후 3:49에 박승호/책임연구원/SW Platform(연)AOT팀 (seungho1.p...@lge.com) 이(가) 쓴 글: Hi, Minchan. I have a question. The problem mentioned can't be resolved with compaction? Is there any reason that zsmalloc

Re: [RFC 0/6] zsmalloc support compaction

2014-12-03 Thread 박승호/책임연구원/SW Platform(연)AOT팀(seungho1.p...@lge.com)
Hi, Minchan. I got it. Thank u :). Seungho. 2014-12-04 오후 4:20에 Minchan Kim 이(가) 쓴 글: Hey Seungho, On Thu, Dec 04, 2014 at 03:49:21PM +0900, 박승호/책임연구원/SW Platform(연)AOT팀(seungho1.p...@lge.com) wrote: Hi, Minchan. I have a question. The problem mentioned can't be resolved with compaction?

[RFC 0/6] zsmalloc support compaction

2014-12-01 Thread Minchan Kim
Recently, there was issue about zsmalloc fragmentation and I got a report from Juno that new fork failed although there are plenty of free pages in the system. His investigation revealed zram is one of the culprit to make heavy fragmentation so there was no more contiguous 16K page for pgd to fork

[RFC 0/6] zsmalloc support compaction

2014-12-01 Thread Minchan Kim
Recently, there was issue about zsmalloc fragmentation and I got a report from Juno that new fork failed although there are plenty of free pages in the system. His investigation revealed zram is one of the culprit to make heavy fragmentation so there was no more contiguous 16K page for pgd to fork