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
  11 void *
  12 kmem_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 }