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Reduction of opened files #797

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jpalus opened this issue Oct 20, 2022 · 2 comments
Closed

Reduction of opened files #797

jpalus opened this issue Oct 20, 2022 · 2 comments

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@jpalus
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jpalus commented Oct 20, 2022

Today mold failed to link qtwebengine from Qt6 due to too many opened files. Linking consists of more than 8400 object files, while my limit at the time was set to 8192. So it appears mold keeps descriptors to all object files at some point. Is it possible to reduce that like close descriptor after processing?
@rui314
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rui314 commented Oct 20, 2022

We close a file as soon as we mmap(2) it. IIUC, mmaped files are not counted as opened files. My ulimit shows that the maximum number of open files for me is 1024, but mold seems to be working fine for large programs. So I guess it's not a simple ulimit error. Can you run the linker with strace to watch what system call is failing?

@jpalus jpalus mentioned this issue Oct 20, 2022
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@jpalus
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jpalus commented Oct 20, 2022

@rui314 you're absolutely right, mold seems to do everything correctly. Looks like it's issue with my particular setup. Raised containers/fuse-overlayfs#378 for this.

@jpalus jpalus closed this as completed Oct 20, 2022
@rui314 rui314 mentioned this issue Nov 7, 2022
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@rui314 @jpalus