LXR linux/fs/xfs/kmem.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   4 * All Rights Reserved.
   5 */
   6#include "xfs.h"
   7#include <linux/backing-dev.h>
   8#include "xfs_message.h"
   9#include "xfs_trace.h"
  10
  11void *
  12kmem_alloc(size_t size, xfs_km_flags_t flags)
  13{
  14        int     retries = 0;
  15        gfp_t   lflags = kmem_flags_convert(flags);
  16        void    *ptr;
  17
  18        trace_kmem_alloc(size, flags, _RET_IP_);
  19
  20        do {
  21                ptr = kmalloc(size, lflags);
  22                if (ptr || (flags & KM_MAYFAIL))
  23                        return ptr;
  24                if (!(++retries % 100))
  25                        xfs_err(NULL,
  26        "%s(%u) possible memory allocation deadlock size %u in %s (mode:0x%x)",
  27                                current->comm, current->pid,
  28                                (unsigned int)size, __func__, lflags);
  29                congestion_wait(BLK_RW_ASYNC, HZ/50);
  30        } while (1);
  31}
  32