From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 76B3237AA75 for ; Sun, 3 May 2026 21:19:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777843182; cv=none; b=GoLVsl6rMD9rHcQFb4+u231+F18HQMZAzg4UwfKDLunjlMkTpxO0/UGdIF5Srq19IAL4vE23B/ieBxynSo3UDi6PzdcZE3/m6wD6B6zZ6i2KeUd+gYDS99NYqLZo008VevKlO2gBu/hJ+ETbB6TPJQyI2DAgxgoqXkj+wqZkL1w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777843182; c=relaxed/simple; bh=3KpNS/hmLCwc35qdGQu68KOMFExlSm3aUs2TQLESe9w=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=YRSDZCYqf/AHXieb5GaSMTl959NiStTRCXuE5n0htKdT0Q3zXEO0G2z+CHX7+ZiVcpoj5rRGoJEmLUVfUAMqIJi4Bg3NRbFvXwheM4T2XFhdbSw4gLyrzUawc1Lnh3D7Fg7MTY8GRbDBN0+cUNpuM+1AZUAAkIhWSR7rwSXXPeU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=SJomsF0N; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="SJomsF0N" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 40ADDC2BCB4; Sun, 3 May 2026 21:19:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777843182; bh=3KpNS/hmLCwc35qdGQu68KOMFExlSm3aUs2TQLESe9w=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=SJomsF0N84/SmhdrrwzG438OZ9uk65NiJyw83hUV+BLXah6+bO/AGgpnO2Vw8P/fX 3WoH0K3ePuHoUe1GSii/T8kptkg+f1pcxtA7IuKcWILjfRR6GinYblv4NIYEx7g/Dl X6MG66L4xd5GUq7GCQ+XCfKUp3q8BTamBu8YZnNF9lBDO69hLglMUj41UGEiq1ufug +idflu8fELAiCgYBdZMqf5Z5+x3F3zxnw7mB0uAhsPpgtKBhkiEqt27erSZ4vRVXED RAiz5RJok85X4UnLmPASQZCOjMYBL1rYXKTOPGHwkCnJpESKnEThw1xppKjsRa+w7k aROkVmCjxVDCA== Date: Sun, 3 May 2026 23:19:38 +0200 From: Alejandro Colomar To: Carlos O'Donell Cc: Patsy Griffin , linux-man@vger.kernel.org Subject: Re: [PATCH] man/man5/core.5: Update compression format for systemd-coredump Message-ID: References: <20260501190609.3604026-1-patsy@redhat.com> Precedence: bulk X-Mailing-List: linux-man@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="4g3eeillwznjjgaw" Content-Disposition: inline In-Reply-To: --4g3eeillwznjjgaw Content-Type: text/plain; protected-headers=v1; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable From: Alejandro Colomar To: Carlos O'Donell Cc: Patsy Griffin , linux-man@vger.kernel.org Subject: Re: [PATCH] man/man5/core.5: Update compression format for systemd-coredump Message-ID: References: <20260501190609.3604026-1-patsy@redhat.com> MIME-Version: 1.0 In-Reply-To: Hi Patsy, Carlos, On 2026-05-01T15:08:21-0400, Carlos O'Donell wrote: > On 5/1/26 3:06 PM, Patsy Griffin wrote: > > As of version 246, systemd-coredump defaults to zstd compression > > for core dumps, rather than lz4. > >=20 > > Signed-off-by: Patsy Griffin >=20 > LGTM. >=20 > I thought coredump.conf allowed you to specify which compression format, > but I was wrong, you can only turn it on or off. This looks correct and on > my system all my coredumps are *.zst today. Best to update this to match > latest deployments. >=20 > Reviewed-by: Carlos O'Donell Thanks! >=20 > > --- > > man/man5/core.5 | 9 +++++++-- > > 1 file changed, 7 insertions(+), 2 deletions(-) > >=20 > > diff --git a/man/man5/core.5 b/man/man5/core.5 > > index 4da5819b6..83c49d42d 100644 > > --- a/man/man5/core.5 > > +++ b/man/man5/core.5 > > @@ -515,9 +515,14 @@ program: > > In this case, core dumps will be placed in the location configured for > > .BR systemd\-coredump (8), > > typically as > > -.BR lz4 (1) > > -compressed files in the directory > > +.BR zstd (1) > > +compressed files > > +ending in ".zst" I think this should be added to suffixes(7). Also, I doubt the suffix should be documented here. Is it an uncommon suffix for zstd(1)-compressed files? If it's the/a common suffix, it should be enough to document it in suffixes(7) and say it's zstd(1) here. Have a lovely night! Alex > > +.\" Since Systemd 246: > > +.\" commit ef5924aa313d1892bb491c870ba3c429454dfc76 > > +in the directory > > .IR /var/lib/systemd/coredump/ . > > +Compression on or off is configurable via coredump.conf(5). > > One can list the core dumps that have been recorded by > > .BR systemd\-coredump (8) > > using >=20 >=20 > --=20 > Cheers, > Carlos. >=20 --=20 --4g3eeillwznjjgaw Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEES7Jt9u9GbmlWADAi64mZXMKQwqkFAmn3u+oACgkQ64mZXMKQ wqlGnA/+Ii4Ry2GqyW7Hz+zzaijWhty7Qu7KlJkzRJUJYF/HTlQ4xBCx7hbWXXPe bdVnxJDrKUGu2jSb596VSFNGxHj3pXtN4Slv6dqR96zO7nnCbke65h8MND4eViaB GEa9V0LyP8HFn4qrEMCzKkXVMCEUzYbZ84G7Ji9ixLoAJHOWge986+xGo/6PEZQ8 VXBW5jxih8X90FKE9hK06/Vnop8up1C8KsYIJfVo7mcC7YuaIKpJD3GMwEAm/Mf2 IMclbkqhwCNLtnolFDFIj5iA4dExBIwKe9eqcYTlrFJioEuTCSYGcLw1eJQqHqbv KY0cIgu/tXVfIIRayoqfJQuUsN4bkx7CcnsKK6f0ymtQHgJDIm90FJEMcFfVRkt9 rpUfCrz7QcEfECtT4H+5kzH2rSt4H3mGotw9aPUsb1LXkcf+TlfH5ng3MMnfoIPe ntsUi1+ceDfIZTJce4OybLISsRrl+kX3PLAj/wCIqVPTGs286sAQ0Cx+9H6I3YYS zQb5XayGMFQ8edUG9/ievhEQypwcAUQJWdmqTKgcrg9qUF7wQ60PDEhkUJr53eOI 6lEJC76z2uwfCKqpeZ8c2OkLMHklVau5wahNkH2CV775wG93znwjXSPKJc4jMxsC g+0JiVJvWIY0aKCo3dcR1zf7GnFPmy04jEPpXsd7xeqQohoqhFI= =KI+F -----END PGP SIGNATURE----- --4g3eeillwznjjgaw--