51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2000-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*/
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#include "xfs.h"
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#include <linux/nmi.h>
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#include "xfs_message.h"
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#include "xfs_trace.h"
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#include "xfs_linux.h"
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void *
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kmem_alloc(size_t size, xfs_km_flags_t flags)
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{
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int retries = 0;
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gfp_t lflags = kmem_flags_convert(flags);
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void *ptr;
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trace_kmem_alloc(size, flags, _RET_IP_);
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if (xfs_kmem_alloc_by_vmalloc &&
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size > (PAGE_SIZE * xfs_kmem_alloc_by_vmalloc) &&
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xfs_kmem_alloc_large_dump_stack) {
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xfs_warn(NULL, "%s size: %ld large than %ld\n",
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__func__, size, PAGE_SIZE * xfs_kmem_alloc_by_vmalloc);
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dump_stack();
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}
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do {
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if (xfs_kmem_alloc_by_vmalloc && (size > PAGE_SIZE * xfs_kmem_alloc_by_vmalloc))
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ptr = __vmalloc(size, lflags);
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else
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ptr = kmalloc(size, lflags);
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if (ptr || (flags & KM_MAYFAIL))
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return ptr;
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if (!(++retries % 100)) {
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xfs_err(NULL,
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"%s(%u) possible memory allocation deadlock size %u in %s (mode:0x%x), flags: 0x%x",
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current->comm, current->pid,
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(unsigned int)size, __func__, lflags, flags);
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if (xfs_kmem_fail_dump_stack == 1)
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dump_stack();
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else if (xfs_kmem_fail_dump_stack == 2)
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trigger_all_cpu_backtrace();
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else if (xfs_kmem_fail_dump_stack == 3)
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__show_mem(0, NULL, gfp_zone(lflags));
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}
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memalloc_retry_wait(lflags);
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} while (1);
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}
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