From 0e847864cef404f555387d7fcc97f7dbe769e1e9 Mon Sep 17 00:00:00 2001 From: Richard Braun Date: Fri, 3 May 2013 19:56:50 +0200 Subject: Handle notification on page eviction If requested by the user, make libpager call pager_notify_evict when a page is flushed out by the kernel. Based on work by Ognyan Kulev. * console/pager.c (pager_notify_evict): New function. (user_pager_create): Update call to pager_create. * ext2fs/pager.c: (pager_notify_evict): New function. (create_disk_pager): Update call to diskfs_start_disk_pager. (diskfs_get_filemap): Update call to pager_create. * fatfs/pager.c: (pager_notify_evict): New function. (create_fat_pager): Update call to diskfs_start_disk_pager. (diskfs_get_filemap): Update call to pager_create. * isofs/pager.c: (pager_notify_evict): New function. (create_disk_pager): Update call to diskfs_start_disk_pager. (diskfs_get_filemap): Update call to pager_create. * libdiskfs/disk-pager.c (diskfs_start_disk_pager): Update definition and call to pager_create. * libdiskfs/diskfs-pager.h (diskfs_start_disk_pager): Update declaration. * libpager/data-request.c (_pager_seqnos_memory_object_data_request): Take pager's `notify_on_evict' member into account when calling memory_object_data_supply. * libpager/data-return.c (_pager_do_write_request): Handle user notification on page flush. * libpager/pager-create.c (pager_create): Update definition and set pager's `notify_on_evict' member. * libpager/pager.h (pager_create): Update declaration. (pager_notify_evict): New declaration. * libpager/priv.h (struct pager): New `notify_on_evict' member. * storeio/pager.c: (pager_notify_evict): New function. (dev_get_memory_object): Update call to pager_create. * tmpfs/pager-stubs.c (pager_notify_evict): New function. * ufs/pager.c (pager_notify_evict): New function. (create_disk_pager): Update call to diskfs_start_disk_pager. (diskfs_get_filemap): Update call to pager_create. --- storeio/pager.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'storeio') diff --git a/storeio/pager.c b/storeio/pager.c index cbae7eb6..7d787110 100644 --- a/storeio/pager.c +++ b/storeio/pager.c @@ -110,6 +110,13 @@ pager_unlock_page (struct user_pager_info *upi, vm_offset_t address) return 0; } +void +pager_notify_evict (struct user_pager_info *pager, + vm_offset_t page) +{ + assert (!"unrequested notification on eviction"); +} + /* The user must define this function. It should report back (in *OFFSET and *SIZE the minimum valid address the pager will accept and the size of the object. */ @@ -246,7 +253,7 @@ dev_get_memory_object (struct dev *dev, vm_prot_t prot, memory_object_t *memobj) { dev->pager = pager_create ((struct user_pager_info *)dev, pager_port_bucket, - 1, MEMORY_OBJECT_COPY_DELAY); + 1, MEMORY_OBJECT_COPY_DELAY, 0); if (dev->pager == NULL) { pthread_mutex_unlock (&dev->pager_lock); -- cgit v1.2.3