The patch titled
dio: use get_user_pages_fast
has been removed from the -mm tree. Its filename was
dio-use-get_user_pages_fast.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: dio: use get_user_pages_fast
From: Nick Piggin <npiggin@xxxxxxx>
Use get_user_pages_fast in the common/generic block and fs direct IO paths.
Signed-off-by: Nick Piggin <npiggin@xxxxxxx>
Cc: Dave Kleikamp <shaggy@xxxxxxxxxxxxxx>
Cc: Andy Whitcroft <apw@xxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Andi Kleen <andi@xxxxxxxxxxxxxx>
Cc: Dave Kleikamp <shaggy@xxxxxxxxxxxxxx>
Cc: Badari Pulavarty <pbadari@xxxxxxxxxx>
Cc: Zach Brown <zach.brown@xxxxxxxxxx>
Cc: Jens Axboe <jens.axboe@xxxxxxxxxx>
Reviewed-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/bio.c | 8 ++------
fs/direct-io.c | 10 ++--------
2 files changed, 4 insertions(+), 14 deletions(-)
diff -puN fs/bio.c~dio-use-get_user_pages_fast fs/bio.c
--- a/fs/bio.c~dio-use-get_user_pages_fast
+++ a/fs/bio.c
@@ -721,12 +721,8 @@ static struct bio *__bio_map_user_iov(st
const int local_nr_pages = end - start;
const int page_limit = cur_page + local_nr_pages;
- down_read(¤t->mm->mmap_sem);
- ret = get_user_pages(current, current->mm, uaddr,
- local_nr_pages,
- write_to_vm, 0, &pages[cur_page], NULL);
- up_read(¤t->mm->mmap_sem);
-
+ ret = get_user_pages_fast(uaddr, local_nr_pages,
+ write_to_vm, &pages[cur_page]);
if (ret < local_nr_pages) {
ret = -EFAULT;
goto out_unmap;
diff -puN fs/direct-io.c~dio-use-get_user_pages_fast fs/direct-io.c
--- a/fs/direct-io.c~dio-use-get_user_pages_fast
+++ a/fs/direct-io.c
@@ -150,17 +150,11 @@ static int dio_refill_pages(struct dio *
int nr_pages;
nr_pages = min(dio->total_pages - dio->curr_page, DIO_PAGES);
- down_read(¤t->mm->mmap_sem);
- ret = get_user_pages(
- current, /* Task for fault acounting */
- current->mm, /* whose pages? */
+ ret = get_user_pages_fast(
dio->curr_user_address, /* Where from? */
nr_pages, /* How many pages? */
dio->rw == READ, /* Write to memory? */
- 0, /* force (?) */
- &dio->pages[0],
- NULL); /* vmas */
- up_read(¤t->mm->mmap_sem);
+ &dio->pages[0]); /* Put results here */
if (ret < 0 && dio->blocks_available && (dio->rw & WRITE)) {
struct page *page = ZERO_PAGE(0);
_
Patches currently in -mm which might be from npiggin@xxxxxxx are
origin.patch
linux-next.patch
mmu-notifiers-add-list_del_init_rcu.patch
mmu-notifiers-add-mm_take_all_locks-operation.patch
mmu-notifier-core.patch
powerpc-implement-pte_special.patch
powerpc-implement-pte_special-update.patch
powerpc-lockless-get_user_pages.patch
vmscan-move-isolate_lru_page-to-vmscanc.patch
vmscan-move-isolate_lru_page-to-vmscanc-fix.patch
vmscan-split-lru-lists-into-anon-file-sets-splitlru-bdi_cap_swap_backed.patch
mlock-mlocked-pages-are-unevictable.patch
mlock-mlocked-pages-are-unevictable-fix.patch
mlock-mlocked-pages-are-unevictable-fix-fix.patch
mlock-mlocked-pages-are-unevictable-fix-3.patch
mlock-mlocked-pages-are-unevictable-fix-fix-munlock-page-table-walk-now-requires-mm.patch
mmap-handle-mlocked-pages-during-map-remap-unmap.patch
mmap-handle-mlocked-pages-during-map-remap-unmap-cleanup.patch
fix-double-unlock_page-in-2626-rc5-mm3-kernel-bug-at-mm-filemapc-575.patch
vmstat-mlocked-pages-statistics.patch
vmstat-mlocked-pages-statistics-fix-incorrect-mlocked-field-of-proc-meminfo.patch
reiser4.patch
likeliness-accounting-change-and-cleanup.patch
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