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88dca4ca5a
The pgprot argument to __vmalloc is always PAGE_KERNEL now, so remove it. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Michael Kelley <mikelley@microsoft.com> [hyperv] Acked-by: Gao Xiang <xiang@kernel.org> [erofs] Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Wei Liu <wei.liu@kernel.org> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: David Airlie <airlied@linux.ie> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Laura Abbott <labbott@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Nitin Gupta <ngupta@vflare.org> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Sakari Ailus <sakari.ailus@linux.intel.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Will Deacon <will@kernel.org> Link: http://lkml.kernel.org/r/20200414131348.444715-22-hch@lst.de Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
139 lines
3.2 KiB
C
139 lines
3.2 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/backing-dev.h>
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#include "xfs_message.h"
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#include "xfs_trace.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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do {
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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)",
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current->comm, current->pid,
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(unsigned int)size, __func__, lflags);
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congestion_wait(BLK_RW_ASYNC, HZ/50);
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} while (1);
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}
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/*
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* __vmalloc() will allocate data pages and auxiliary structures (e.g.
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* pagetables) with GFP_KERNEL, yet we may be under GFP_NOFS context here. Hence
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* we need to tell memory reclaim that we are in such a context via
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* PF_MEMALLOC_NOFS to prevent memory reclaim re-entering the filesystem here
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* and potentially deadlocking.
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*/
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static void *
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__kmem_vmalloc(size_t size, xfs_km_flags_t flags)
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{
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unsigned nofs_flag = 0;
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void *ptr;
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gfp_t lflags = kmem_flags_convert(flags);
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if (flags & KM_NOFS)
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nofs_flag = memalloc_nofs_save();
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ptr = __vmalloc(size, lflags);
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if (flags & KM_NOFS)
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memalloc_nofs_restore(nofs_flag);
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return ptr;
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}
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/*
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* Same as kmem_alloc_large, except we guarantee the buffer returned is aligned
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* to the @align_mask. We only guarantee alignment up to page size, we'll clamp
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* alignment at page size if it is larger. vmalloc always returns a PAGE_SIZE
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* aligned region.
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*/
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void *
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kmem_alloc_io(size_t size, int align_mask, xfs_km_flags_t flags)
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{
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void *ptr;
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trace_kmem_alloc_io(size, flags, _RET_IP_);
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if (WARN_ON_ONCE(align_mask >= PAGE_SIZE))
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align_mask = PAGE_SIZE - 1;
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ptr = kmem_alloc(size, flags | KM_MAYFAIL);
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if (ptr) {
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if (!((uintptr_t)ptr & align_mask))
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return ptr;
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kfree(ptr);
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}
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return __kmem_vmalloc(size, flags);
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}
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void *
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kmem_alloc_large(size_t size, xfs_km_flags_t flags)
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{
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void *ptr;
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trace_kmem_alloc_large(size, flags, _RET_IP_);
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ptr = kmem_alloc(size, flags | KM_MAYFAIL);
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if (ptr)
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return ptr;
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return __kmem_vmalloc(size, flags);
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}
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void *
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kmem_realloc(const void *old, size_t newsize, 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_realloc(newsize, flags, _RET_IP_);
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do {
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ptr = krealloc(old, newsize, 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 %zu in %s (mode:0x%x)",
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current->comm, current->pid,
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newsize, __func__, lflags);
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congestion_wait(BLK_RW_ASYNC, HZ/50);
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} while (1);
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}
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void *
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kmem_zone_alloc(kmem_zone_t *zone, 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_zone_alloc(kmem_cache_size(zone), flags, _RET_IP_);
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do {
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ptr = kmem_cache_alloc(zone, 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 in %s (mode:0x%x)",
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current->comm, current->pid,
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__func__, lflags);
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congestion_wait(BLK_RW_ASYNC, HZ/50);
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} while (1);
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}
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