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authorLinus Torvalds <torvalds@linux-foundation.org>2014-06-04 11:50:34 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-04 11:50:34 -0400
commit1aacb90eaaac057c10fd746e189553e04cfeb291 (patch)
treeeaf5b2eddc9e2e446b5402c106a3bf086aee925a /Documentation/vm
parentb05d59dfceaea72565b1648af929b037b0f96d7f (diff)
parent31789538e3ba7dd164e063d4978c96af1894be4c (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next
Pull trivial tree changes from Jiri Kosina: "Usual pile of patches from trivial tree that make the world go round" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (23 commits) staging: go7007: remove reference to CONFIG_KMOD aic7xxx: Remove obsolete preprocessor define of: dma: doc fixes doc: fix incorrect formula to calculate CommitLimit value doc: Note need of bc in the kernel build from 3.10 onwards mm: Fix printk typo in dmapool.c modpost: Fix comment typo "Modules.symvers" Kconfig.debug: Grammar s/addition/additional/ wimax: Spelling s/than/that/, wording s/destinatary/recipient/ aic7xxx: Spelling s/termnation/termination/ arm64: mm: Remove superfluous "the" in comment of: Spelling s/anonymouns/anonymous/ dma: imx-sdma: Spelling s/determnine/determine/ ath10k: Improve grammar in comments ath6kl: Spelling s/determnine/determine/ of: Improve grammar for of_alias_get_id() documentation drm/exynos: Spelling s/contro/control/ radio-bcm2048.c: fix wrong overflow check doc: printk-formats: do not mention casts for u64/s64 doc: spelling error changes ...
Diffstat (limited to 'Documentation/vm')
-rw-r--r--Documentation/vm/transhuge.txt4
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/vm/transhuge.txt b/Documentation/vm/transhuge.txt
index 4a63953a41f1..6b31cfbe2a9a 100644
--- a/Documentation/vm/transhuge.txt
+++ b/Documentation/vm/transhuge.txt
@@ -360,13 +360,13 @@ on any tail page, would mean having to split all hugepages upfront in
360get_user_pages which is unacceptable as too many gup users are 360get_user_pages which is unacceptable as too many gup users are
361performance critical and they must work natively on hugepages like 361performance critical and they must work natively on hugepages like
362they work natively on hugetlbfs already (hugetlbfs is simpler because 362they work natively on hugetlbfs already (hugetlbfs is simpler because
363hugetlbfs pages cannot be splitted so there wouldn't be requirement of 363hugetlbfs pages cannot be split so there wouldn't be requirement of
364accounting the pins on the tail pages for hugetlbfs). If we wouldn't 364accounting the pins on the tail pages for hugetlbfs). If we wouldn't
365account the gup refcounts on the tail pages during gup, we won't know 365account the gup refcounts on the tail pages during gup, we won't know
366anymore which tail page is pinned by gup and which is not while we run 366anymore which tail page is pinned by gup and which is not while we run
367split_huge_page. But we still have to add the gup pin to the head page 367split_huge_page. But we still have to add the gup pin to the head page
368too, to know when we can free the compound page in case it's never 368too, to know when we can free the compound page in case it's never
369splitted during its lifetime. That requires changing not just 369split during its lifetime. That requires changing not just
370get_page, but put_page as well so that when put_page runs on a tail 370get_page, but put_page as well so that when put_page runs on a tail
371page (and only on a tail page) it will find its respective head page, 371page (and only on a tail page) it will find its respective head page,
372and then it will decrease the head page refcount in addition to the 372and then it will decrease the head page refcount in addition to the