6e46b8b24f
L2P table can be huge in many cases, since it typically requires 1GB of DRAM for 1TB of drive. When there is not enough memory available, OOM killer turns on and kills random processes, which can be very annoying for users. This patch changes the flag for L2P table allocation on order to handle this situation in more user friendly way. GFP_KERNEL and __GPF_HIGHMEM are default flags used in parameterless vmalloc() calls, so they are also keeped in that patch. Additionally __GFP_NOWARN flag is added in order to hide very long dmesg warn in case of the allocation failures. The most important flag introduced in that patch is __GFP_RETRY_MAYFAIL, which would cause allocator to try use free memory and if not available to drop caches, but not to run OOM killer. Signed-off-by: Igor Konopko <igor.j.konopko@intel.com> Reviewed-by: Hans Holmberg <hans.holmberg@cnexlabs.com> Reviewed-by: Javier González <javier@javigon.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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.