From: Jens Axboe <axboe@kernel.dk> mainline inclusion from mainline-v6.10-rc2 commit cceba6f7e46c48deca433030d80fc34599fb9fd8 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/ICPOEB CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... -------------------------------- Add a folio flag that file IO can use to indicate that the cached IO being done should be dropped from the page cache upon completion. Link: https://lkml.kernel.org/r/20241220154831.1086649-5-axboe@kernel.dk Signed-off-by: Jens Axboe <axboe@kernel.dk> Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Brian Foster <bfoster@redhat.com> Cc: Chris Mason <clm@meta.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Conflicts: include/linux/page-flags.h [Not merge dfbac6dc68ba ("mm: separate out FOLIO_FLAGS from PAGEFLAGS")] Signed-off-by: Long Li <leo.lilong@huawei.com> --- include/linux/page-flags.h | 5 +++++ include/trace/events/mmflags.h | 3 ++- 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index 7a67d997eece..141df2d8ad70 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -119,6 +119,7 @@ enum pageflags { PG_reclaim, /* To be reclaimed asap */ PG_swapbacked, /* Page is backed by RAM/swap */ PG_unevictable, /* Page is "unevictable" */ + PG_dropbehind, /* drop pages on IO completion */ #ifdef CONFIG_MMU PG_mlocked, /* Page is vma mlocked */ #endif @@ -543,6 +544,10 @@ PAGEFLAG(Reclaim, reclaim, PF_NO_TAIL) PAGEFLAG(Readahead, readahead, PF_NO_COMPOUND) TESTCLEARFLAG(Readahead, readahead, PF_NO_COMPOUND) +PAGEFLAG(Dropbehind, dropbehind, PF_HEAD) + TESTCLEARFLAG(Dropbehind, dropbehind, PF_HEAD) + __SETPAGEFLAG(Dropbehind, dropbehind, PF_HEAD) + #ifdef CONFIG_HIGHMEM /* * Must use a macro here due to header dependency issues. page_zone() is not diff --git a/include/trace/events/mmflags.h b/include/trace/events/mmflags.h index 6104fa2b6e47..7b8b7577b6bc 100644 --- a/include/trace/events/mmflags.h +++ b/include/trace/events/mmflags.h @@ -125,7 +125,8 @@ DEF_PAGEFLAG_NAME(mappedtodisk), \ DEF_PAGEFLAG_NAME(reclaim), \ DEF_PAGEFLAG_NAME(swapbacked), \ - DEF_PAGEFLAG_NAME(unevictable) \ + DEF_PAGEFLAG_NAME(unevictable), \ + DEF_PAGEFLAG_NAME(dropbehind) \ IF_HAVE_PG_MLOCK(mlocked) \ IF_HAVE_PG_UNCACHED(uncached) \ IF_HAVE_PG_HWPOISON(hwpoison) \ -- 2.39.2