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b4ad50ac5f
For earlier versions of the kernel with memalloc_noio_save, it only turns off __GFP_IO but leaves __GFP_FS untouched during direct reclaim. This would cause threads to direct reclaim into ZFS and cause deadlock. Instead, we should stick to using spl_fstrans_mark. Since we would explicitly turn off both __GFP_IO and __GFP_FS before allocation, it will work on every version of the kernel. This impacts kernel versions 3.9-3.17, see upstream kernel commit torvalds/linux@934f307 for reference. Signed-off-by: Chunwei Chen <david.chen@osnexus.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Tim Chase <tim@chase2k.com> Closes #515 Issue zfsonlinux/zfs#4111
110 lines
2.8 KiB
C
110 lines
2.8 KiB
C
/*
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* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
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* Copyright (C) 2007 The Regents of the University of California.
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* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
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* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
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* UCRL-CODE-235197
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*
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* This file is part of the SPL, Solaris Porting Layer.
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* For details, see <http://zfsonlinux.org/>.
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*
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* The SPL is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* The SPL is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with the SPL. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <sys/debug.h>
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#include <sys/vmem.h>
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#include <linux/mm_compat.h>
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#include <linux/module.h>
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vmem_t *heap_arena = NULL;
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EXPORT_SYMBOL(heap_arena);
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vmem_t *zio_alloc_arena = NULL;
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EXPORT_SYMBOL(zio_alloc_arena);
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vmem_t *zio_arena = NULL;
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EXPORT_SYMBOL(zio_arena);
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size_t
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vmem_size(vmem_t *vmp, int typemask)
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{
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ASSERT3P(vmp, ==, NULL);
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ASSERT3S(typemask & VMEM_ALLOC, ==, VMEM_ALLOC);
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ASSERT3S(typemask & VMEM_FREE, ==, VMEM_FREE);
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return (VMALLOC_TOTAL);
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}
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EXPORT_SYMBOL(vmem_size);
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/*
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* Public vmem_alloc(), vmem_zalloc() and vmem_free() interfaces.
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*/
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void *
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spl_vmem_alloc(size_t size, int flags, const char *func, int line)
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{
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ASSERT0(flags & ~KM_PUBLIC_MASK);
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flags |= KM_VMEM;
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#if !defined(DEBUG_KMEM)
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return (spl_kmem_alloc_impl(size, flags, NUMA_NO_NODE));
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#elif !defined(DEBUG_KMEM_TRACKING)
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return (spl_kmem_alloc_debug(size, flags, NUMA_NO_NODE));
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#else
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return (spl_kmem_alloc_track(size, flags, func, line, NUMA_NO_NODE));
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#endif
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}
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EXPORT_SYMBOL(spl_vmem_alloc);
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void *
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spl_vmem_zalloc(size_t size, int flags, const char *func, int line)
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{
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ASSERT0(flags & ~KM_PUBLIC_MASK);
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flags |= (KM_VMEM | KM_ZERO);
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#if !defined(DEBUG_KMEM)
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return (spl_kmem_alloc_impl(size, flags, NUMA_NO_NODE));
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#elif !defined(DEBUG_KMEM_TRACKING)
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return (spl_kmem_alloc_debug(size, flags, NUMA_NO_NODE));
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#else
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return (spl_kmem_alloc_track(size, flags, func, line, NUMA_NO_NODE));
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#endif
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}
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EXPORT_SYMBOL(spl_vmem_zalloc);
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void
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spl_vmem_free(const void *buf, size_t size)
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{
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#if !defined(DEBUG_KMEM)
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return (spl_kmem_free_impl(buf, size));
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#elif !defined(DEBUG_KMEM_TRACKING)
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return (spl_kmem_free_debug(buf, size));
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#else
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return (spl_kmem_free_track(buf, size));
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#endif
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}
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EXPORT_SYMBOL(spl_vmem_free);
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int
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spl_vmem_init(void)
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{
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return (0);
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}
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void
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spl_vmem_fini(void)
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{
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}
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