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Fri, 01 May 2026 12:08:23 -0700 (PDT) X-Received: by 2002:a05:622a:550c:b0:50e:c093:9051 with SMTP id d75a77b69052e-5104bef1bc4mr8210491cf.30.1777662503133; Fri, 01 May 2026 12:08:23 -0700 (PDT) Received: from [192.168.0.116] ([198.48.244.52]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-51040b86535sm24434031cf.27.2026.05.01.12.08.22 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 01 May 2026 12:08:22 -0700 (PDT) Message-ID: Date: Fri, 1 May 2026 15:08:21 -0400 Precedence: bulk X-Mailing-List: linux-man@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] man/man5/core.5: Update compression format for systemd-coredump To: Patsy Griffin , Alejandro Colomar Cc: linux-man@vger.kernel.org References: <20260501190609.3604026-1-patsy@redhat.com> Content-Language: en-US From: Carlos O'Donell Organization: Red Hat, LLC. In-Reply-To: <20260501190609.3604026-1-patsy@redhat.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit 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. > > Signed-off-by: Patsy Griffin LGTM. 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. Reviewed-by: Carlos O'Donell > --- > man/man5/core.5 | 9 +++++++-- > 1 file changed, 7 insertions(+), 2 deletions(-) > > 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" > +.\" 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 -- Cheers, Carlos.