Hi Omar,
On Fri, Jul 19, 2024 at 2:24 PM Omar Sandoval wrote:
>
> From: Omar Sandoval
>
> This is v4 of my patch series optimizing debuginfod for kernel
> debuginfo. v1 is here [1], v2 is here [2], v3 is here [3]. The only
> changes from v3 in this version are fixing a bogus maybe-uninitialize
On Tue, Jul 23, 2024 at 05:47:50PM -0400, Aaron Merey wrote:
> Hi Omar,
>
> On Fri, Jul 19, 2024 at 2:24 PM Omar Sandoval wrote:
> >
> > From: Omar Sandoval
> >
> > This is v4 of my patch series optimizing debuginfod for kernel
> > debuginfo. v1 is here [1], v2 is here [2], v3 is here [3]. The
From: Omar Sandoval
dwarf_extract_source_paths explicitly skips source files that equal
"", but dwarf_filesrc may return a path like "dir/".
Check for and skip that case, too.
In particular, the test debuginfod RPMs have paths like this. However,
the test cases didn't catch this because they ha
From: Omar Sandoval
This is v4 of my patch series optimizing debuginfod for kernel
debuginfo. v1 is here [1], v2 is here [2], v3 is here [3], v4 is here
[4]. The only change from v4 in this version is adding --fdcache-mbs
and --fdcache-mintmp to the new test to fix some sporadic test failures.
From: Omar Sandoval
Since commit acd9525e93d7 ("PR31265 - rework debuginfod archive-extract
fdcache"), the fdcache limit is only applied when a new file is interned
and it has been at least 10 seconds since the limit was last applied.
This means that the fdcache can go over the limit temporarily.
From: Omar Sandoval
Since the schema change adding _r_seekable was done in a backward
compatible way, seekable archives that were previously scanned will not
be in _r_seekable. Whenever an archive is going to be extracted to
satisfy a request, check if it is seekable. If so, populate _r_seekabl
From: Omar Sandoval
handle_buildid_r_match has two very similar branches where it optionally
extracts a section and then creates a microhttpd response. In
preparation for adding a third one, factor it out into a function.
Signed-off-by: Omar Sandoval
---
debuginfod/debuginfod.cxx | 213 ++
From: Omar Sandoval
Whenever a new archive is scanned, check if it is seekable with a little
liblzma magic, and populate _r_seekable if so. With this, newly scanned
seekable archives will used the optimized extraction path added in the
previous commit. Also add a test case using some artificial
From: Omar Sandoval
In order to extract a file from a seekable archive, we need to know
where in the uncompressed archive the file data starts and its size.
Additionally, in order to populate the response headers, we need the
file modification time (since we won't be able to get it from the
archi
From: Omar Sandoval
The kernel debuginfo packages on Fedora, Debian, and Ubuntu, and many of
their downstreams, are all compressed with xz in multi-threaded mode,
which allows random access. We can use this to bypass the full archive
extraction and dramatically speed up kernel debuginfo requests
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