dso__data_write_cache_offs(9)

dso__data_write_cache_offs(9) 💅

okay so welcome to the Kernel API Manual corner of the group chat — today’s main character is dso__data_write_cache_offs, and she is lowkey here to write data into the dso data cache. No cap. ✨

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NAME 🌸

dso__data_write_cache_offs — write data to dso data cache at file offset.

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SYNOPSIS 🎀

ssize_t dso__data_write_cache_offs (struct dso *dso , struct machine
*machine , u64 offset , const u8 *data_in , ssize_t size );

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ARGUMENTS 🫶

• dso — the dso object, bestie.
• machine — the machine object.
• offset — file offset, iykyk.
• data_in — the manual literally says -- undescribed -- here, so that’s the whole tea 🫖.
• size — size of the data buffer.

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DESCRIPTION 🌸

So the vibe is: this writes into the dso file data cache. But it does not change the file itself — not touching the actual file, periodt. 💅

bestie, key detail: cache gets the write, file stays unchanged. 🦋

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SEE ALSO 🔥

Kernel file ./tools/perf/util/dso.c plus these besties:

• dso__data_close(9)
• dso__data_get_fd(9)
• dso__data_size(9)
• dso__data_read_offset(9)
• dso__data_read_addr(9)
• dso__data_write_cache_addr(9)

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mwah 💋 — source/version vibes: this page lives in ./tools/perf/util, dated October 2026, and it’s serving dso__data_write_cache_offs(9) realness. 🎀