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e242b92af5
While a btree transaction is running, we hold a SRCU read lock on the btree key cache that prevents btree key cache keys from being freed - this is so that relock() operations won't access freed memory. The downside of this is that long running btree transactions prevent memory from being freed from the key cache. This adds a check in bch2_trans_begin() - if the transaction has been running longer than 1 second, drop and retake the SRCU read lock and zero out pointers to unlock key cache paths. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> |
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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.