Re: [PATCH v1] memory tier: consolidate the initialization of memory tiers

On Fri, 21 Jun 2024 04:48:30 + "Ho-Ren (Jack) Chuang" wrote: > If we simply move the set_node_memory_tier() from memory_tier_init() to > late_initcall(), it will result in HMAT not registering the > mt_adistance_algorithm callback function, Immediate reaction: then don't do that! >

Re: [External] Re: [PATCH v11 1/2] memory tier: dax/kmem: introduce an abstract layer for finding, allocating, and putting memory types

On Tue, 9 Apr 2024 12:00:06 -0700 "Ho-Ren (Jack) Chuang" wrote: > Hi Jonathan, > > On Fri, Apr 5, 2024 at 6:56 AM Jonathan Cameron > wrote: > > > > On Fri, 5 Apr 2024 00:07:05 + > > "Ho-Ren (Jack) Chuang" wrote: > > > > > Since different memory devices require finding, allocating, and

Re: [Qemu-devel] [PATCH 1/1] mm: gup: teach get_user_pages_unlocked to handle FOLL_NOWAIT

On Fri, 2 Mar 2018 18:43:43 +0100 Andrea Arcangeli wrote: > KVM is hanging during postcopy live migration with userfaultfd because > get_user_pages_unlocked is not capable to handle FOLL_NOWAIT. > > Earlier FOLL_NOWAIT was only ever passed to get_user_pages. > >

Re: [Qemu-devel] [PATCH v9 3/5] mm: function to offer a page block on the free list

On Thu, 13 Apr 2017 17:35:06 +0800 Wei Wang wrote: > Add a function to find a page block on the free list specified by the > caller. Pages from the page block may be used immediately after the > function returns. The caller is responsible for detecting or preventing > the

Re: [Qemu-devel] [PATCH kernel v8 3/4] mm: add inerface to offer info about unused pages

On Thu, 16 Mar 2017 15:08:46 +0800 Wei Wang wrote: > From: Liang Li > > This patch adds a function to provides a snapshot of the present system > unused pages. An important usage of this function is to provide the > unsused pages to the Live

Re: [Qemu-devel] [PATCH 22/23] userfaultfd: avoid mmap_sem read recursion in mcopy_atomic

There's a more serious failure with i386 allmodconfig: fs/userfaultfd.c:145:2: note: in expansion of macro 'BUILD_BUG_ON' BUILD_BUG_ON(sizeof(struct uffd_msg) != 32); I'm surprised the feature is even reachable on i386 builds?

Re: [Qemu-devel] [PATCH 22/23] userfaultfd: avoid mmap_sem read recursion in mcopy_atomic

On Thu, 14 May 2015 19:31:19 +0200 Andrea Arcangeli aarca...@redhat.com wrote: If the rwsem starves writers it wasn't strictly a bug but lockdep doesn't like it and this avoids depending on lowlevel implementation details of the lock. ... @@ -229,13 +246,33 @@ static __always_inline

Re: [Qemu-devel] [PATCH 00/23] userfaultfd v4

On Thu, 14 May 2015 19:30:57 +0200 Andrea Arcangeli aarca...@redhat.com wrote: This is the latest userfaultfd patchset against mm-v4.1-rc3 2015-05-14-10:04. It would be useful to have some userfaultfd testcases in tools/testing/selftests/. Partly as an aid to arch maintainers when enabling

Re: [Qemu-devel] [PATCH 8/9] mm: compaction: Cache if a pageblock was scanned and no pages were isolated

On Tue, 25 Sep 2012 10:12:07 +0100 Mel Gorman mgor...@suse.de wrote: First, we'd introduce a variant of get_pageblock_migratetype() that returns all the bits for the pageblock flags and then helpers to extract either the migratetype or the PG_migrate_skip. We already are incurring the cost of

Re: [Qemu-devel] [PATCH 5/9] mm: compaction: Acquire the zone-lru_lock as late as possible

On Tue, 25 Sep 2012 17:13:27 +0900 Minchan Kim minc...@kernel.org wrote: I see. To me, your saying is better than current comment. I hope comment could be more explicit. diff --git a/mm/compaction.c b/mm/compaction.c index df01b4e..f1d2cc7 100644 --- a/mm/compaction.c +++

Re: [Qemu-devel] [PATCH 8/9] mm: compaction: Cache if a pageblock was scanned and no pages were isolated

On Mon, 24 Sep 2012 10:39:38 +0100 Mel Gorman mgor...@suse.de wrote: On Fri, Sep 21, 2012 at 02:36:56PM -0700, Andrew Morton wrote: Also, what has to be done to avoid the polling altogether? eg/ie, zap a pageblock's PB_migrate_skip synchronously, when something was done

Re: [Qemu-devel] [PATCH 4/9] mm: compaction: Abort compaction loop if lock is contended or run too long

On Fri, 21 Sep 2012 11:46:18 +0100 Mel Gorman mgor...@suse.de wrote: Changelog since V2 o Fix BUG_ON triggered due to pages left on cc.migratepages o Make compact_zone_order() require non-NULL arg `contended' Changelog since V1 o only abort the compaction if lock is contended or run too

Re: [Qemu-devel] [PATCH 8/9] mm: compaction: Cache if a pageblock was scanned and no pages were isolated

On Fri, 21 Sep 2012 11:46:22 +0100 Mel Gorman mgor...@suse.de wrote: When compaction was implemented it was known that scanning could potentially be excessive. The ideal was that a counter be maintained for each pageblock but maintaining this information would incur a severe penalty due to a

Re: [Qemu-devel] [PATCH 6/9] mm: compaction: Acquire the zone-lock as late as possible

On Fri, 21 Sep 2012 11:46:20 +0100 Mel Gorman mgor...@suse.de wrote: Compactions free scanner acquires the zone-lock when checking for PageBuddy pages and isolating them. It does this even if there are no PageBuddy pages in the range. This patch defers acquiring the zone lock for as long as

Re: [Qemu-devel] [PATCH 0/2] core dump: re-purpose VM_ALWAYSDUMP to user controlled VM_DONTDUMP

On Wed, 7 Mar 2012 12:00:46 -0500 Jason Baron jba...@redhat.com wrote: Hi, The motivation for this change was that I was looking at a way for a qemu-kvm process, to exclude the guest memory from its core dump, which can be quite large. There are already a number of filter flags in