From: Michal Hocko <mhocko@kernel.org> To: Minchan Kim <minchan@kernel.org> Cc: Daniel Colascione <dancol@google.com>, Andrew Morton <akpm@linux-foundation.org>, LKML <linux-kernel@vger.kernel.org>, linux-mm <linux-mm@kvack.org>, Johannes Weiner <hannes@cmpxchg.org>, Tim Murray <timmurray@google.com>, Joel Fernandes <joel@joelfernandes.org>, Suren Baghdasaryan <surenb@google.com>, Shakeel Butt <shakeelb@google.com>, Sonny Rao <sonnyrao@google.com>, Brian Geffon <bgeffon@google.com>, Linux API <linux-api@vger.kernel.org> Subject: Re: [RFC 6/7] mm: extend process_madvise syscall to support vector arrary Date: Thu, 30 May 2019 20:47:13 +0200 [thread overview] Message-ID: <20190530184713.GI6703@dhcp22.suse.cz> (raw) In-Reply-To: <20190530080214.GA159502@google.com> On Thu 30-05-19 17:02:14, Minchan Kim wrote: > On Thu, May 30, 2019 at 08:57:55AM +0200, Michal Hocko wrote: > > On Thu 30-05-19 11:17:48, Minchan Kim wrote: [...] > > > First time, I didn't think about atomicity about address range race > > > because MADV_COLD/PAGEOUT is not critical for the race. > > > However you raised the atomicity issue because people would extend > > > hints to destructive ones easily. I agree with that and that's why > > > we discussed how to guarantee the race and Daniel comes up with good idea. > > > > Just for the clarification, I didn't really mean atomicity but rather a > > _consistency_ (essentially time to check to time to use consistency). > > What do you mean by *consistency*? Could you elaborate it more? That you operate on the object you have got by some means. In other words that the range you want to call madvise on hasn't been remapped/replaced by a different mmap operation. -- Michal Hocko SUSE Labs
next prev parent reply other threads:[~2019-05-30 18:47 UTC|newest] Thread overview: 138+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-05-20 3:52 [RFC 0/7] introduce memory hinting API for external process Minchan Kim 2019-05-20 3:52 ` [RFC 1/7] mm: introduce MADV_COOL Minchan Kim 2019-05-20 8:16 ` Michal Hocko 2019-05-20 8:19 ` Michal Hocko 2019-05-20 15:08 ` Suren Baghdasaryan 2019-05-20 22:55 ` Minchan Kim 2019-05-20 22:54 ` Minchan Kim 2019-05-21 6:04 ` Michal Hocko 2019-05-21 9:11 ` Minchan Kim 2019-05-21 10:05 ` Michal Hocko 2019-05-28 8:53 ` Hillf Danton 2019-05-28 10:58 ` Minchan Kim 2019-05-20 3:52 ` [RFC 2/7] mm: change PAGEREF_RECLAIM_CLEAN with PAGE_REFRECLAIM Minchan Kim 2019-05-20 16:50 ` Johannes Weiner 2019-05-20 22:57 ` Minchan Kim 2019-05-20 3:52 ` [RFC 3/7] mm: introduce MADV_COLD Minchan Kim 2019-05-20 8:27 ` Michal Hocko 2019-05-20 23:00 ` Minchan Kim 2019-05-21 6:08 ` Michal Hocko 2019-05-21 9:13 ` Minchan Kim 2019-05-28 14:54 ` Hillf Danton 2019-05-30 0:45 ` Minchan Kim 2019-05-20 3:52 ` [RFC 4/7] mm: factor out madvise's core functionality Minchan Kim 2019-05-20 14:26 ` Oleksandr Natalenko 2019-05-21 1:26 ` Minchan Kim 2019-05-21 6:36 ` Oleksandr Natalenko 2019-05-21 6:50 ` Michal Hocko 2019-05-21 7:06 ` Oleksandr Natalenko 2019-05-21 10:52 ` Minchan Kim 2019-05-21 11:00 ` Michal Hocko 2019-05-21 11:24 ` Minchan Kim 2019-05-21 11:32 ` Michal Hocko 2019-05-21 10:49 ` Minchan Kim 2019-05-21 10:55 ` Michal Hocko 2019-05-20 3:52 ` [RFC 5/7] mm: introduce external memory hinting API Minchan Kim 2019-05-20 9:18 ` Michal Hocko 2019-05-21 2:41 ` Minchan Kim 2019-05-21 6:17 ` Michal Hocko 2019-05-21 10:32 ` Minchan Kim 2019-05-21 9:01 ` Christian Brauner 2019-05-21 11:35 ` Minchan Kim 2019-05-21 11:51 ` Christian Brauner 2019-05-21 15:31 ` Oleg Nesterov 2019-05-27 7:43 ` Minchan Kim 2019-05-27 15:12 ` Oleg Nesterov 2019-05-27 23:33 ` Minchan Kim 2019-05-28 7:23 ` Michal Hocko 2019-05-29 3:41 ` Hillf Danton 2019-05-30 0:38 ` Minchan Kim 2019-05-20 3:52 ` [RFC 6/7] mm: extend process_madvise syscall to support vector arrary Minchan Kim 2019-05-20 9:22 ` Michal Hocko 2019-05-21 2:48 ` Minchan Kim 2019-05-21 6:24 ` Michal Hocko 2019-05-21 10:26 ` Minchan Kim 2019-05-21 10:37 ` Michal Hocko 2019-05-27 7:49 ` Minchan Kim 2019-05-29 10:08 ` Daniel Colascione 2019-05-29 10:33 ` Michal Hocko 2019-05-30 2:17 ` Minchan Kim 2019-05-30 6:57 ` Michal Hocko 2019-05-30 8:02 ` Minchan Kim 2019-05-30 16:19 ` Daniel Colascione 2019-05-30 18:47 ` Michal Hocko [this message] 2019-05-29 4:14 ` Hillf Danton 2019-05-30 0:35 ` Minchan Kim 2019-05-20 3:52 ` [RFC 7/7] mm: madvise support MADV_ANONYMOUS_FILTER and MADV_FILE_FILTER Minchan Kim 2019-05-20 9:28 ` Michal Hocko 2019-05-21 2:55 ` Minchan Kim 2019-05-21 6:26 ` Michal Hocko 2019-05-27 7:58 ` Minchan Kim 2019-05-27 12:44 ` Michal Hocko 2019-05-28 3:26 ` Minchan Kim 2019-05-28 6:29 ` Michal Hocko 2019-05-28 8:13 ` Minchan Kim 2019-05-28 8:31 ` Daniel Colascione 2019-05-28 8:49 ` Minchan Kim 2019-05-28 9:08 ` Michal Hocko 2019-05-28 9:39 ` Daniel Colascione 2019-05-28 10:33 ` Michal Hocko 2019-05-28 11:21 ` Daniel Colascione 2019-05-28 11:49 ` Michal Hocko 2019-05-28 12:11 ` Daniel Colascione 2019-05-28 12:32 ` Michal Hocko 2019-05-28 10:32 ` Minchan Kim 2019-05-28 10:41 ` Michal Hocko 2019-05-28 11:12 ` Minchan Kim 2019-05-28 11:28 ` Michal Hocko 2019-05-28 11:42 ` Daniel Colascione 2019-05-28 11:56 ` Michal Hocko 2019-05-28 12:18 ` Daniel Colascione 2019-05-28 12:38 ` Michal Hocko 2019-05-28 12:10 ` Minchan Kim 2019-05-28 11:44 ` Minchan Kim 2019-05-28 11:51 ` Daniel Colascione 2019-05-28 12:06 ` Michal Hocko 2019-05-28 12:22 ` Minchan Kim 2019-05-28 11:28 ` Daniel Colascione 2019-05-21 15:33 ` Johannes Weiner 2019-05-22 1:50 ` Minchan Kim 2019-05-29 4:36 ` Hillf Danton 2019-05-30 1:00 ` Minchan Kim 2019-05-20 6:37 ` [RFC 0/7] introduce memory hinting API for external process Anshuman Khandual 2019-05-20 16:59 ` Tim Murray 2019-05-21 2:55 ` Anshuman Khandual 2019-05-21 5:14 ` Minchan Kim 2019-05-21 10:34 ` Michal Hocko 2019-05-28 10:50 ` Anshuman Khandual 2019-05-21 12:56 ` Shakeel Butt 2019-05-22 4:15 ` Brian Geffon 2019-05-22 4:23 ` Brian Geffon 2019-05-20 9:28 ` Michal Hocko 2019-05-20 14:42 ` Oleksandr Natalenko 2019-05-21 2:56 ` Minchan Kim 2019-05-20 16:46 ` Johannes Weiner 2019-05-21 4:39 ` Minchan Kim 2019-05-21 6:32 ` Michal Hocko 2019-05-21 1:44 ` Matthew Wilcox 2019-05-21 5:01 ` Minchan Kim 2019-05-21 6:34 ` Michal Hocko 2019-05-21 8:42 ` Christian Brauner 2019-05-21 11:05 ` Minchan Kim 2019-05-21 11:30 ` Christian Brauner 2019-05-21 11:39 ` Christian Brauner 2019-05-22 5:11 ` Daniel Colascione 2019-05-22 8:22 ` Christian Brauner 2019-05-22 13:16 ` Daniel Colascione 2019-05-22 14:52 ` Christian Brauner 2019-05-22 15:17 ` Daniel Colascione 2019-05-22 15:48 ` Christian Brauner 2019-05-22 15:57 ` Daniel Colascione 2019-05-22 16:01 ` Christian Brauner 2019-05-22 16:01 ` Daniel Colascione 2019-05-23 13:07 ` Minchan Kim 2019-05-27 8:06 ` Minchan Kim 2019-05-21 11:41 ` Minchan Kim 2019-05-21 12:04 ` Christian Brauner 2019-05-21 12:15 ` Oleksandr Natalenko 2019-05-21 12:53 ` Shakeel Butt
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