* Re: [PATCH 5/6] dax,pmem: Add data recovery feature to pmem_copy_to/from_iter()
[not found] <20211021001059.438843-6-jane.chu@oracle.com>
@ 2021-10-26 10:21 ` kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2021-10-26 10:21 UTC (permalink / raw)
To: Jane Chu, david, djwong, dan.j.williams, hch, vishal.l.verma,
dave.jiang, agk, snitzer, dm-devel, ira.weiny
Cc: llvm, kbuild-all
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Hi Jane,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on device-mapper-dm/for-next]
[also build test WARNING on mszeredi-fuse/for-next linus/master v5.15-rc7 next-20211025]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Jane-Chu/dax-poison-recovery-with-RWF_RECOVERY_DATA-flag/20211021-081336
base: https://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git for-next
config: i386-randconfig-a013-20211022 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 5dc339d9825f1dbe788cfb69c88210a59bbf8e3a)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/0day-ci/linux/commit/a01994a484c54b2f4b6eb32104ab3caf7b9b32a8
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Jane-Chu/dax-poison-recovery-with-RWF_RECOVERY_DATA-flag/20211021-081336
git checkout a01994a484c54b2f4b6eb32104ab3caf7b9b32a8
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=i386
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> drivers/nvdimm/pmem.c:337:12: warning: format specifies type 'unsigned long' but the argument has type 'size_t' (aka 'unsigned int') [-Wformat]
addr, bytes);
^~~~~
include/linux/dev_printk.h:146:70: note: expanded from macro 'dev_warn'
dev_printk_index_wrap(_dev_warn, KERN_WARNING, dev, dev_fmt(fmt), ##__VA_ARGS__)
~~~ ^~~~~~~~~~~
include/linux/dev_printk.h:110:23: note: expanded from macro 'dev_printk_index_wrap'
_p_func(dev, fmt, ##__VA_ARGS__); \
~~~ ^~~~~~~~~~~
1 warning generated.
vim +337 drivers/nvdimm/pmem.c
306
307 /*
308 * Even though the 'no check' versions of copy_from_iter_flushcache()
309 * and copy_mc_to_iter() are used to bypass HARDENED_USERCOPY overhead,
310 * 'read'/'write' aren't always safe when poison is consumed. They happen
311 * to be safe because the 'read'/'write' range has been guaranteed
312 * be free of poison(s) by a prior call to dax_direct_access() on the
313 * caller stack.
314 * However with the introduction of DAXDEV_F_RECOVERY, the 'read'/'write'
315 * range may contain poison(s), so the functions perform explicit check
316 * on poison, and 'read' end up fetching only non-poisoned page(s) up
317 * till the first poison is encountered while 'write' require the range
318 * is page aligned in order to restore the poisoned page's memory type
319 * back to "rw" after clearing the poison(s).
320 * In the event of poison related failure, (size_t) -EIO is returned and
321 * caller may check the return value after casting it to (ssize_t).
322 */
323 static size_t pmem_copy_from_iter(struct dax_device *dax_dev, pgoff_t pgoff,
324 void *addr, size_t bytes, struct iov_iter *i, unsigned long flags)
325 {
326 phys_addr_t pmem_off;
327 size_t len, lead_off;
328 struct pmem_device *pmem = dax_get_private(dax_dev);
329 struct device *dev = pmem->bb.dev;
330
331 if (flags & DAXDEV_F_RECOVERY) {
332 lead_off = (unsigned long)addr & ~PAGE_MASK;
333 len = PFN_PHYS(PFN_UP(lead_off + bytes));
334 if (is_bad_pmem(&pmem->bb, PFN_PHYS(pgoff) / 512, len)) {
335 if (lead_off || !(PAGE_ALIGNED(bytes))) {
336 dev_warn(dev, "Found poison, but addr(%p) and/or bytes(%#lx) not page aligned\n",
> 337 addr, bytes);
338 return (size_t) -EIO;
339 }
340 pmem_off = PFN_PHYS(pgoff) + pmem->data_offset;
341 if (pmem_clear_poison(pmem, pmem_off, bytes) !=
342 BLK_STS_OK)
343 return (size_t) -EIO;
344 }
345 }
346
347 return _copy_from_iter_flushcache(addr, bytes, i);
348 }
349
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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