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Quelle task_io_accounting.h Sprache: C |
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/* SPDX-License-Identifier: GPL-2.0 */ /* * task_io_accounting: a structure which is used for recording a single task's * IO statistics. * * Don't include this header file directly - it is designed to be dragged in via * sched.h. * * Blame Andrew Morton for all this. */ struct task_io_accounting { #ifdef CONFIG_TASK_XACCT /* bytes read */ u64 rchar; /* bytes written */ u64 wchar; /* # of read syscalls */ u64 syscr; /* # of write syscalls */ u64 syscw; #endif /* CONFIG_TASK_XACCT */ #ifdef CONFIG_TASK_IO_ACCOUNTING /* * The number of bytes which this task has caused to be read from * storage. */ u64 read_bytes; /* * The number of bytes which this task has caused, or shall cause to be * written to disk. */ u64 write_bytes; /* * A task can cause "negative" IO too. If this task truncates some * dirty pagecache, some IO which another task has been accounted for * (in its write_bytes) will not be happening. We _could_ just * subtract that from the truncating task's write_bytes, but there is * information loss in doing that. */ u64 cancelled_write_bytes; #endif /* CONFIG_TASK_IO_ACCOUNTING */ };
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2026-10-09