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06fa229ceb
A rolling buffer is a series of folios held in a list of folio_queues. New folios and folio_queue structs may be inserted at the head simultaneously with spent ones being removed from the tail without the need for locking. The rolling buffer includes an iov_iter and it has to be careful managing this as the list of folio_queues is extended such that an oops doesn't incurred because the iterator was pointing to the end of a folio_queue segment that got appended to and then removed. We need to use the mechanism twice, once for read and once for write, and, in future patches, we will use a second rolling buffer to handle bounce buffering for content encryption. Signed-off-by: David Howells <dhowells@redhat.com> Link: https://lore.kernel.org/r/20241216204124.3752367-6-dhowells@redhat.com cc: Jeff Layton <jlayton@kernel.org> cc: netfs@lists.linux.dev cc: linux-fsdevel@vger.kernel.org Signed-off-by: Christian Brauner <brauner@kernel.org> |
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| .. | ||
| buffered_read.c | ||
| buffered_write.c | ||
| direct_read.c | ||
| direct_write.c | ||
| fscache_cache.c | ||
| fscache_cookie.c | ||
| fscache_internal.h | ||
| fscache_io.c | ||
| fscache_main.c | ||
| fscache_proc.c | ||
| fscache_stats.c | ||
| fscache_volume.c | ||
| internal.h | ||
| iterator.c | ||
| Kconfig | ||
| locking.c | ||
| main.c | ||
| Makefile | ||
| misc.c | ||
| objects.c | ||
| read_collect.c | ||
| read_pgpriv2.c | ||
| read_retry.c | ||
| rolling_buffer.c | ||
| stats.c | ||
| write_collect.c | ||
| write_issue.c | ||