mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-28 12:53:14 +01:00
David Hildenbrand
c77369b437
We want an easy way to take a R/O or R/W longterm pin on a range and be able to observe the content of the pinned pages, so we can properly test how longterm puns interact with our COW logic. [[email protected]: silence a warning on 32-bit] Link: https://lkml.kernel.org/r/[email protected] [[email protected]: ./mm/gup_test.c:281:2-3: Unneeded semicolon] Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=2455 Link: https://lkml.kernel.org/r/[email protected] Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: David Hildenbrand <[email protected]> Signed-off-by: Yang Li <[email protected]> Cc: Andrea Arcangeli <[email protected]> Cc: Christoph von Recklinghausen <[email protected]> Cc: Don Dutile <[email protected]> Cc: Jason Gunthorpe <[email protected]> Cc: John Hubbard <[email protected]> Cc: Mike Rapoport <[email protected]> Cc: Nadav Amit <[email protected]> Cc: Peter Xu <[email protected]> Cc: Shuah Khan <[email protected]> Cc: Vlastimil Babka <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
46 lines
1.2 KiB
C
46 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef __GUP_TEST_H
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#define __GUP_TEST_H
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#include <linux/types.h>
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#define GUP_FAST_BENCHMARK _IOWR('g', 1, struct gup_test)
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#define PIN_FAST_BENCHMARK _IOWR('g', 2, struct gup_test)
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#define PIN_LONGTERM_BENCHMARK _IOWR('g', 3, struct gup_test)
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#define GUP_BASIC_TEST _IOWR('g', 4, struct gup_test)
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#define PIN_BASIC_TEST _IOWR('g', 5, struct gup_test)
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#define DUMP_USER_PAGES_TEST _IOWR('g', 6, struct gup_test)
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#define PIN_LONGTERM_TEST_START _IOW('g', 7, struct pin_longterm_test)
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#define PIN_LONGTERM_TEST_STOP _IO('g', 8)
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#define PIN_LONGTERM_TEST_READ _IOW('g', 9, __u64)
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#define GUP_TEST_MAX_PAGES_TO_DUMP 8
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#define GUP_TEST_FLAG_DUMP_PAGES_USE_PIN 0x1
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struct gup_test {
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__u64 get_delta_usec;
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__u64 put_delta_usec;
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__u64 addr;
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__u64 size;
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__u32 nr_pages_per_call;
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__u32 gup_flags;
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__u32 test_flags;
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/*
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* Each non-zero entry is the number of the page (1-based: first page is
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* page 1, so that zero entries mean "do nothing") from the .addr base.
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*/
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__u32 which_pages[GUP_TEST_MAX_PAGES_TO_DUMP];
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};
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#define PIN_LONGTERM_TEST_FLAG_USE_WRITE 1
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#define PIN_LONGTERM_TEST_FLAG_USE_FAST 2
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struct pin_longterm_test {
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__u64 addr;
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__u64 size;
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__u32 flags;
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};
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#endif /* __GUP_TEST_H */
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