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Auto-guess atomic_write_size from /sys

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This commit is contained in:
Vitaliy Filippov
2025-12-02 01:52:12 +03:00
parent eaff4509ca
commit 959f792f82
8 changed files with 48 additions and 2 deletions
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src/disk_tool/disk_tool_udev.cpp
+13
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@@ -367,6 +367,19 @@ int disk_tool_t::pre_exec_osd(std::string device)
{
return 1;
}
if (sb["params"]["atomic_write_size"].uint64_value() > 4096 &&
sb["params"]["use_atomic_flag"].bool_value())
{
uint64_t atomic_write_size = get_atomic_write_size(sb["real_data_device"].string_value());
if (atomic_write_size < sb["params"]["atomic_write_size"].uint64_value())
{
fprintf(stderr, "Atomic write size is set to %ju in the OSD superblock but data device %s only supports %ju."
" Did you enable IOMMU? Linux has a hardcoded max_hw_sectors_kb value for NVMe drives.\n",
sb["params"]["atomic_write_size"].uint64_value(),
sb["real_data_device"].string_value().c_str(), atomic_write_size);
return 1;
}
}
if (json_is_true(sb["params"]["disable_meta_fsync"]) &&
sb["real_meta_device"].string_value() != "" && sb["real_meta_device"] != sb["real_data_device"] &&
check_disabled_cache(sb["real_meta_device"].string_value()) != 0)