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Miaohe Lin
6cec2b95da
When swap in shmem error at swapoff time, there would be a infinite loop in the while loop in shmem_unuse_inode(). It's because swapin error is deliberately ignored now and thus info->swapped will never reach 0. So we can't escape the loop in shmem_unuse(). In order to fix the issue, swapin_error entry is stored in the mapping when swapin error occurs. So the swapcache page can be freed and the user won't end up with a permanently mounted swap because a sector is bad. If the page is accessed later, the user process will be killed so that corrupted data is never consumed. On the other hand, if the page is never accessed, the user won't even notice it. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Miaohe Lin <[email protected]> Reported-by: Naoya Horiguchi <[email protected]> Reviewed-by: Naoya Horiguchi <[email protected]> Cc: Alistair Popple <[email protected]> Cc: David Hildenbrand <[email protected]> Cc: David Howells <[email protected]> Cc: Hugh Dickins <[email protected]> Cc: Matthew Wilcox (Oracle) <[email protected]> Cc: NeilBrown <[email protected]> Cc: Peter Xu <[email protected]> Cc: Ralph Campbell <[email protected]> Cc: Suren Baghdasaryan <[email protected]> Cc: Vlastimil Babka <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
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.