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1/ If we find an entry that is too young to be pruned, return SHRINK_STOP to ensure we don't get called again. This is more correct, and avoids wasting a little CPU time. Prior to 3.12, it can prevent drop_slab() from spinning indefinitely. 2/ Return a precise number from rpcauth_cache_shrink_count(), rather than rounding down to a multiple of 100 (of whatever sysctl_vfs_cache_pressure is). This ensures that when we "echo 3 > /proc/sys/vm/drop_caches", this cache is still purged, even if it has fewer than 100 entires. Neither of these are really important, they just make behaviour more predicatable, which can be helpful when debugging related issues. Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.