From: Matthew Wilcox <willy@infradead.org>
To: Jan Kara <jack@suse.cz>
Cc: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH 3/8] xarray: Explicitely set XA_FREE_MARK in __xa_cmpxchg()
Date: Tue, 17 Mar 2020 08:12:14 -0700 [thread overview]
Message-ID: <20200317151214.GB22433@bombadil.infradead.org> (raw)
In-Reply-To: <20200204142514.15826-4-jack@suse.cz>
On Tue, Feb 04, 2020 at 03:25:09PM +0100, Jan Kara wrote:
> __xa_cmpxchg() relies on xas_store() to set XA_FREE_MARK when storing
> NULL into xarray that has free tracking enabled. Make the setting of
> XA_FREE_MARK explicit similarly as its clearing currently it.
> if (curr == old) {
> xas_store(&xas, entry);
> - if (xa_track_free(xa) && entry && !curr)
> - xas_clear_mark(&xas, XA_FREE_MARK);
> + if (xa_track_free(xa)) {
> + if (entry && !curr)
> + xas_clear_mark(&xas, XA_FREE_MARK);
> + else if (!entry && curr)
> + xas_set_mark(&xas, XA_FREE_MARK);
> + }
This isn't right because the entry might have a different mark set on it
that would have been cleared before, but now won't be. I should add
a test case for that ...
next prev parent reply other threads:[~2020-03-17 15:12 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-04 14:25 [PATCH 0/8] mm: Speedup page cache truncation Jan Kara
2020-02-04 14:25 ` [PATCH 1/8] xarray: Fix premature termination of xas_for_each_marked() Jan Kara
2020-03-12 21:45 ` Matthew Wilcox
2020-03-16 9:16 ` Jan Kara
2020-02-04 14:25 ` [PATCH 2/8] xarray: Provide xas_erase() helper Jan Kara
2020-03-14 19:54 ` Matthew Wilcox
2020-03-16 9:21 ` Jan Kara
2020-03-17 15:28 ` Matthew Wilcox
2020-04-15 16:12 ` Jan Kara
2020-02-04 14:25 ` [PATCH 3/8] xarray: Explicitely set XA_FREE_MARK in __xa_cmpxchg() Jan Kara
2020-02-05 18:45 ` Jason Gunthorpe
2020-02-06 8:03 ` Jan Kara
2020-03-17 15:12 ` Matthew Wilcox [this message]
2020-02-04 14:25 ` [PATCH 4/8] mm: Use xas_erase() in page_cache_delete_batch() Jan Kara
2020-02-04 14:25 ` [PATCH 5/8] dax: Use xas_erase() in __dax_invalidate_entry() Jan Kara
2020-02-04 14:25 ` [PATCH 6/8] idr: Use xas_erase() in ida_destroy() Jan Kara
2020-02-04 14:25 ` [PATCH 7/8] mm: Use xas_erase() in collapse_file() Jan Kara
2020-02-04 14:25 ` [PATCH 8/8] xarray: Don't clear marks in xas_store() Jan Kara
2020-02-05 18:43 ` Jason Gunthorpe
2020-02-05 21:59 ` Matthew Wilcox
2020-02-06 13:49 ` Jason Gunthorpe
2020-02-06 14:36 ` Jan Kara
2020-02-06 14:49 ` Jason Gunthorpe
2020-02-05 22:19 ` John Hubbard
2020-02-06 2:21 ` Matthew Wilcox
2020-02-06 3:48 ` John Hubbard
2020-02-06 4:28 ` Matthew Wilcox
2020-02-06 4:37 ` John Hubbard
2020-02-06 8:36 ` Jan Kara
2020-02-06 8:04 ` Jan Kara
2020-02-06 14:40 ` [PATCH 0/8] mm: Speedup page cache truncation David Sterba
2020-02-18 9:25 ` Jan Kara
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