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Date: Wed, 8 Feb 2017 20:01:13 -0800 From: Matthew Wilcox <willy@...radead.org> To: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com> Cc: Theodore Ts'o <tytso@....edu>, Andreas Dilger <adilger.kernel@...ger.ca>, Jan Kara <jack@...e.com>, Andrew Morton <akpm@...ux-foundation.org>, Alexander Viro <viro@...iv.linux.org.uk>, Hugh Dickins <hughd@...gle.com>, Andrea Arcangeli <aarcange@...hat.com>, Dave Hansen <dave.hansen@...el.com>, Vlastimil Babka <vbabka@...e.cz>, Ross Zwisler <ross.zwisler@...ux.intel.com>, linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, linux-mm@...ck.org, linux-block@...r.kernel.org Subject: Re: [PATCHv6 03/37] page-flags: relax page flag policy for few flags On Thu, Jan 26, 2017 at 02:57:45PM +0300, Kirill A. Shutemov wrote: > These flags are in use for filesystems with backing storage: PG_error, > PG_writeback and PG_readahead. Oh ;-) Then I amend my comment on patch 1 to be "patch 3 needs to go ahead of patch 1" ;-) > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com> > --- > include/linux/page-flags.h | 10 +++++----- > 1 file changed, 5 insertions(+), 5 deletions(-) > > diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h > index 6b5818d6de32..b85b73cfb1b3 100644 > --- a/include/linux/page-flags.h > +++ b/include/linux/page-flags.h > @@ -263,7 +263,7 @@ static inline int TestClearPage##uname(struct page *page) { return 0; } > > __PAGEFLAG(Locked, locked, PF_NO_TAIL) > PAGEFLAG(Waiters, waiters, PF_ONLY_HEAD) __CLEARPAGEFLAG(Waiters, waiters, PF_ONLY_HEAD) > -PAGEFLAG(Error, error, PF_NO_COMPOUND) TESTCLEARFLAG(Error, error, PF_NO_COMPOUND) > +PAGEFLAG(Error, error, PF_NO_TAIL) TESTCLEARFLAG(Error, error, PF_NO_TAIL) > PAGEFLAG(Referenced, referenced, PF_HEAD) > TESTCLEARFLAG(Referenced, referenced, PF_HEAD) > __SETPAGEFLAG(Referenced, referenced, PF_HEAD) > @@ -303,15 +303,15 @@ PAGEFLAG(OwnerPriv1, owner_priv_1, PF_ANY) > * Only test-and-set exist for PG_writeback. The unconditional operators are > * risky: they bypass page accounting. > */ > -TESTPAGEFLAG(Writeback, writeback, PF_NO_COMPOUND) > - TESTSCFLAG(Writeback, writeback, PF_NO_COMPOUND) > +TESTPAGEFLAG(Writeback, writeback, PF_NO_TAIL) > + TESTSCFLAG(Writeback, writeback, PF_NO_TAIL) > PAGEFLAG(MappedToDisk, mappedtodisk, PF_NO_TAIL) > > /* PG_readahead is only used for reads; PG_reclaim is only for writes */ > PAGEFLAG(Reclaim, reclaim, PF_NO_TAIL) > TESTCLEARFLAG(Reclaim, reclaim, PF_NO_TAIL) > -PAGEFLAG(Readahead, reclaim, PF_NO_COMPOUND) > - TESTCLEARFLAG(Readahead, reclaim, PF_NO_COMPOUND) > +PAGEFLAG(Readahead, reclaim, PF_NO_TAIL) > + TESTCLEARFLAG(Readahead, reclaim, PF_NO_TAIL) > > #ifdef CONFIG_HIGHMEM > /* > -- > 2.11.0 > > -- > To unsubscribe, send a message with 'unsubscribe linux-mm' in > the body to majordomo@...ck.org. For more info on Linux MM, > see: http://www.linux-mm.org/ . > Don't email: <a href=mailto:"dont@...ck.org"> email@...ck.org </a>
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