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7047b5a40b
If THP is failed to migrate due to -ENOSYS or -ENOMEM case, the THP will be split, and the subpages of fail-to-migrate THP will be tried to migrate again, so we should not account the retry counter in the second loop, since we already accounted 'nr_thp_failed' in the first loop. Moreover we also do not need retry 10 times for -EAGAIN case for the subpages of fail-to-migrate THP in the second loop, since we already regarded the THP as migration failure, and save some migration time (for the worst case, will try 512 * 10 times) according to previous discussion [1]. [1] https://lore.kernel.org/linux-mm/87r13a7n04.fsf@yhuang6-desk2.ccr.corp.intel.com/ Link: https://lkml.kernel.org/r/20220817081408.513338-9-ying.huang@intel.com Tested-by: "Huang, Ying" <ying.huang@intel.com> Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Zi Yan <ziy@nvidia.com> Cc: Yang Shi <shy828301@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.