Joel, Am Samstag, 3. November 2018, 05:00:38 CET schrieb Joel Fernandes: > Hi, > Here is the latest "fast mremap" series. This just a repost with Kirill's > Acked-bys added. I would like this to be considered for linux -next. I also > dropped the CONFIG enablement patch for arm64 since I am yet to test it with > the new TLB flushing code that is in very recent kernel releases. (None of my > arm64 devices run mainline right now.) so I will post the arm64 enablement once > I get to that. The performance numbers in the series are for x86. > > List of patches in series: > > (1) mm: select HAVE_MOVE_PMD in x86 for faster mremap > > (2) mm: speed up mremap by 20x on large regions (v4) > v1->v2: Added support for per-arch enablement (Kirill Shutemov) > v2->v3: Updated commit message to state the optimization may also > run for non-thp type of systems (Daniel Col). > v3->v4: Remove useless pmd_lock check (Kirill Shutemov) > Rebased ontop of Linus's master, updated perf results based > on x86 testing. Added Kirill's Acks. > > (3) mm: treewide: remove unused address argument from pte_alloc functions (v2) > v1->v2: fix arch/um/ prototype which was missed in v1 (Anton Ivanov) > update changelog with manual fixups for m68k and microblaze. > > not included - (4) mm: select HAVE_MOVE_PMD in arm64 for faster mremap > This patch is dropped since last posting pending further performance > testing on arm64 with new TLB gather updates. See notes in patch > titled "mm: speed up mremap by 500x on large regions" for more > details. > This breaks UML build: CC mm/mremap.o mm/mremap.c: In function ‘move_normal_pmd’: mm/mremap.c:229:2: error: implicit declaration of function ‘set_pmd_at’; did you mean ‘set_pte_at’? [-Werror=implicit-function-declaration] set_pmd_at(mm, new_addr, new_pmd, pmd); ^~~~~~~~~~ set_pte_at CC crypto/rng.o CC fs/direct-io.o cc1: some warnings being treated as errors To test yourself, just run on a x86 box: $ make defconfig ARCH=um $ make linux ARCH=um Thanks, //richard
