From: David Sterba <dsterba@suse.cz>
To: Chris Mason <clm@fb.com>
Cc: "linux-hexagon@vger.kernel.org" <linux-hexagon@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"dsterba@suse.cz" <dsterba@suse.cz>,
David Sterba <dsterba@suse.com>,
Josef Bacik <josef@toxicpanda.com>,
"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
linux-btrfs <linux-btrfs@vger.kernel.org>
Subject: Re: [PATCH] btrfs: Disable BTRFS on platforms having 256K pages
Date: Fri, 11 Jun 2021 15:21:22 +0200 [thread overview]
Message-ID: <20210611132121.GF28158@twin.jikos.cz> (raw)
In-Reply-To: <6769ED4C-15A8-4CFF-BF2B-26A5328257A0@fb.com>
On Fri, Jun 11, 2021 at 12:58:58PM +0000, Chris Mason wrote:
> > On Jun 10, 2021, at 12:20 PM, David Sterba <dsterba@suse.cz> wrote:
> > On Thu, Jun 10, 2021 at 04:50:09PM +0200, Christophe Leroy wrote:
> >> Le 10/06/2021 à 15:54, Chris Mason a écrit :
> >>>> On Jun 10, 2021, at 1:23 AM, Christophe Leroy <christophe.leroy@csgroup.eu> wrote:
> > And there's no such thing like "just bump BTRFS_MAX_COMPRESSED to 256K".
> > The constant is part of on-disk format for lzo and otherwise changing it
> > would impact performance so this would need proper evaluation.
>
> Sorry, how is it baked into LZO? It definitely will have performance implications, I agree there.
lzo_decompress_bio:
309 /*
310 * Compressed data header check.
311 *
312 * The real compressed size can't exceed the maximum extent length, and
313 * all pages should be used (whole unused page with just the segment
314 * header is not possible). If this happens it means the compressed
315 * extent is corrupted.
316 */
317 if (tot_len > min_t(size_t, BTRFS_MAX_COMPRESSED, srclen) ||
318 tot_len < srclen - PAGE_SIZE) {
319 ret = -EUCLEAN;
320 goto done;
321 }
next prev parent reply other threads:[~2021-06-11 13:24 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-10 5:23 [PATCH] fs: btrfs: Disable BTRFS on platforms having 256K pages Christophe Leroy
2021-06-10 13:54 ` [PATCH] " Chris Mason
2021-06-10 14:50 ` Christophe Leroy
2021-06-10 16:20 ` David Sterba
2021-06-11 12:58 ` Chris Mason
2021-06-11 13:21 ` David Sterba [this message]
2021-06-11 16:56 ` Chris Mason
2021-06-12 14:44 ` Brian Cain
2021-06-11 12:34 ` [PATCH] fs: " David Sterba
2021-06-11 13:47 ` Qu Wenruo
2022-01-04 23:32 ` Qu Wenruo
2022-01-06 16:31 ` Neal Gompa
2022-01-07 0:13 ` Qu Wenruo
2022-01-07 2:45 ` Hector Martin
2022-01-07 4:55 ` Michael Ellerman
2022-01-07 5:21 ` Qu Wenruo
2022-01-10 8:29 ` Christophe Leroy
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