Why does the Linux kernel build system use incremental linking or ar T thin archives?
While studying the kernel build system, I noticed that before v4.9 the kernel was using incremental linking (ld -r) and then it moved to thin archives (ar T) as shown at: What is the difference between the following kernel Makefile terms: vmLinux, vmlinuz, vmlinux.bin, zimage & bzimage? I noticed
Then, I tried to make a synthetic incremental linking benchmark to see if the link speedup was considerable at: https://stackoverflow.com/questions/3349521/what-is-incremental-linking/53959661#53959661 but it wasn't for my benchmark.
Therefore, my question is: why does the kernel use incremental linking or thin archives?
Is it to speed up the build or for some other reason?
Which commit introduced incremental linking? With that I would be able to figure out the rationale from git log. I found the one that moved to thin archives with git log --grep 'thin archive' (a5967db9af51a84f5e181600954714a9e4c69f1f), but could not easily grep the incremental linking one.
If it exists to speed up the build, is there a way to quickly test out link with vs without incremental linking to see the speedup?
linux-kernel
asked Dec 28 '18 at 14:11
Ciro Santilli 新疆改造中心 六四事件 法轮功
4,94124041
add a comment |
While studying the kernel build system, I noticed that before v4.9 the kernel was using incremental linking (ld -r) and then it moved to thin archives (ar T) as shown at: What is the difference between the following kernel Makefile terms: vmLinux, vmlinuz, vmlinux.bin, zimage & bzimage? I noticed
Then, I tried to make a synthetic incremental linking benchmark to see if the link speedup was considerable at: https://stackoverflow.com/questions/3349521/what-is-incremental-linking/53959661#53959661 but it wasn't for my benchmark.
Therefore, my question is: why does the kernel use incremental linking or thin archives?
Is it to speed up the build or for some other reason?
Which commit introduced incremental linking? With that I would be able to figure out the rationale from git log. I found the one that moved to thin archives with git log --grep 'thin archive' (a5967db9af51a84f5e181600954714a9e4c69f1f), but could not easily grep the incremental linking one.
If it exists to speed up the build, is there a way to quickly test out link with vs without incremental linking to see the speedup?
linux-kernel
asked Dec 28 '18 at 14:11
Ciro Santilli 新疆改造中心 六四事件 法轮功
4,94124041
add a comment |
While studying the kernel build system, I noticed that before v4.9 the kernel was using incremental linking (ld -r) and then it moved to thin archives (ar T) as shown at: What is the difference between the following kernel Makefile terms: vmLinux, vmlinuz, vmlinux.bin, zimage & bzimage? I noticed
Then, I tried to make a synthetic incremental linking benchmark to see if the link speedup was considerable at: https://stackoverflow.com/questions/3349521/what-is-incremental-linking/53959661#53959661 but it wasn't for my benchmark.
Therefore, my question is: why does the kernel use incremental linking or thin archives?
Is it to speed up the build or for some other reason?
Which commit introduced incremental linking? With that I would be able to figure out the rationale from git log. I found the one that moved to thin archives with git log --grep 'thin archive' (a5967db9af51a84f5e181600954714a9e4c69f1f), but could not easily grep the incremental linking one.
If it exists to speed up the build, is there a way to quickly test out link with vs without incremental linking to see the speedup?
linux-kernel
asked Dec 28 '18 at 14:11
Ciro Santilli 新疆改造中心 六四事件 法轮功
4,94124041
While studying the kernel build system, I noticed that before v4.9 the kernel was using incremental linking (ld -r) and then it moved to thin archives (ar T) as shown at: What is the difference between the following kernel Makefile terms: vmLinux, vmlinuz, vmlinux.bin, zimage & bzimage? I noticed
Then, I tried to make a synthetic incremental linking benchmark to see if the link speedup was considerable at: https://stackoverflow.com/questions/3349521/what-is-incremental-linking/53959661#53959661 but it wasn't for my benchmark.
Therefore, my question is: why does the kernel use incremental linking or thin archives?
Is it to speed up the build or for some other reason?
Which commit introduced incremental linking? With that I would be able to figure out the rationale from git log. I found the one that moved to thin archives with git log --grep 'thin archive' (a5967db9af51a84f5e181600954714a9e4c69f1f), but could not easily grep the incremental linking one.
If it exists to speed up the build, is there a way to quickly test out link with vs without incremental linking to see the speedup?
linux-kernel
linux-kernel
asked Dec 28 '18 at 14:11
Ciro Santilli 新疆改造中心 六四事件 法轮功
4,94124041
asked Dec 28 '18 at 14:11
Ciro Santilli 新疆改造中心 六四事件 法轮功
4,94124041
edited 9 mins ago
asked Dec 28 '18 at 14:11
Ciro Santilli 新疆改造中心 六四事件 法轮功
4,94124041
asked Dec 28 '18 at 14:11
Ciro Santilli 新疆改造中心 六四事件 法轮功
4,94124041
asked Dec 28 '18 at 14:11
Ciro Santilli 新疆改造中心 六四事件 法轮功
4,94124041
4,94124041
add a comment |
add a comment |
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