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 } 32